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Journal of Jilin Agricultural University
2022, Vol.44 Num.5
Online: 2022-10-31


 
505 CUI Xiyan,ZHANG Yingying,ZHOU Ying
Research Progress of Plant Transcription Factors in Response to Drought Stress Hot!
In recent years, soil drought has become increasingly serious due to climate warming.Drought can affect plant growth at least, and cause plant death at most. Plant transcription factor families play an important role in regulating plant growth and development, metabolic processes, and biotic and abiotic stress processes. This paper reviews the structure of five transcription factor families including bZIP, NAC, WRKY, MYB and AP2/ERF in response to drought stress, as well as the research progress in the regulation mode of transcription factor family and its involvement in signaltransduction under drought stress. It is expected to provide reference for the future research on mo?lecular mechanism and regulation of drought tolerance in plants.
2022 Vol. 44 (5): 505-511 [Abstract] ( 87 ) [HTML 1KB] [PDF 1193KB] ( 0 )
512 WANG Yiming,TAN Zining,ZHU Daomi,CHEN Linlin,MA Hongxia
Research Progress of Quorum Sensing System in Regulating Klebsiella pneumoniae Biofilm Formation Hot!
Biofilm (BF) is a sessile microbial community formed when bacteria adhere to solid sur? faces, of which the released extracellular polymers can improve resistance to antibiotics and host im? mune system. Recently, with the ever deepening understanding of pathogenesis and development and usage of novel antibacterial agents, infectious diseases have been controlled efficiently. However, high drug selection pressure has resulted in frequent appearance of drug-resistant strains, posing a serious threat to human and animal health. Klebsiella pneumoniae is a common opportunistic bacte?rium, and the formation of its biofilm is closely related to bacterial virulence and drug resistance. Studies found that bacterial quorum sensing (QS) system plays a key role in BF formation. BF forma? tion can be effectively prevented by inhibiting QS system, and thus reducing pathogen virulence and drug resistance. As a result, inhibiting QS related molecules could be a novel strategy against BF for? mation, with vital clinical significance. The article reviewed Klebsiella pneumoniae BF formation, QS system and its regulation effect on BF, as well as the effective routes to suppress QS system, aiming to provide new ideas for relative research on QS regulation of BF.
2022 Vol. 44 (5): 512-519 [Abstract] ( 65 ) [HTML 1KB] [PDF 1216KB] ( 0 )
520 JIAO Peng,ZOU Junyan,JIANG Zhenzhong,QU Jing,MA Yiyong,GUAN Shuyan
Screening and Bioinformatics Analysis of Maize Trihelix Transcription Factor Family
Trihelix gene family is a kind of small transcription factor family that is key in regulating plant stress response and improving crop quality. In this study, 43 members of the Trihelix family were selected from the whole genome database of maize by bioinformatics methods. In order to fur? ther explore the function of the Trihelix transcription factor family of maize, chromosome localization analysis, signal peptide analysis, subcellular localization analysis, phosphorylation site analysis, phy? logenetic tree construction, protein structure analysis and conservative motif analysis were carried out respectively. The results showed that the members of ZmTrihelix family are unevenly distributed on chromosome 1-10. Only ZmTrihelix1 signal peptide exists in this protein family; 83.7% of the pro? tein family is located on the nucleus, 16.3% on chloroplast, cytoplasmic membrane and mitochon? dria. Phosphorylation of the protein family is mainly concentrated on oxalic acid, serine and threo? nine residues. The family is divided into five subfamilies, namely GT-1, GT-2, GTγ, SIP1 and SH4; The members of these families are highly conservative, and each subfamily has its special domain. The protein family consists of multiple helix, extended chain and corner structures. The research has laid a foundation for exploring the functions of the members of maize Trihelix family and further pro? vided reference for quality improvement and molecular breeding of maize.
2022 Vol. 44 (5): 520-527 [Abstract] ( 46 ) [HTML 1KB] [PDF 2335KB] ( 0 )
528 LIU Shuang,WANG Zhen,CI Jiabin,YANG Wei,JIANG Liangyu,YANG Weiguang
Genetic Improvement Effect of Single Plant Yield and Yield Components of Core Germplasm of Maize Reid Group Hot!
Abundant germplasm resources are the basis of genetic material for breeding excellent maize varieties. The fundamental way to solve the problem of narrow germplasm resources is to intro? duce, expand, improve and innovate genetic materials. The inbred line PH6WC of Reid group was used as the basic material, J1590, J1595 and J1020,J1598 were respectively cultivated after two rounds of genetic improvement, and then the basic line and the four improved lines in the two rounds were used as female parent, and the six No-Reid group inbred lines were used as the male parent to make 5×6 incomplete double-column hybridization to analyze the heterosis and combining ability. The results showed that the genetic gain effect of the second round of improved line J1598 was the best. Its single plant yield, ear thickness, 100-grain weight and ear length heterosis values were all higher than those of the basic line and the first round of improved lines J1590 and J1595. Combining ability analysis showed that the general combining ability improvement effect of the second round ofimproved line J1598 was better, and the improved lines J1590, J1595 and J1598 based on PH6WC were easily grouped in traits such as single plant yield, ear thickness, 100-grain weight, and ear length to match better hybrids. Comprehensive research results showed that the first round of im? proved lines J1590 and J1595 and the second round of improved lines J1598 could be used as excel? lent germplasm for hybrids and have a high potential for use.
2022 Vol. 44 (5): 528-535 [Abstract] ( 32 ) [HTML 1KB] [PDF 1309KB] ( 0 )
536 BI Rui,CUI Juan,WEI Lixia,SHI Shusen
Effects of Temperature on Growth and Development of Palomena viridissim (Poda)
To explore the effect of temperature on growth and development of Palomena viridissim (Poda), the effects of five constant temperature treatments at 19, 22, 25, 28 and 31℃ on development period, development rate, survival rate, development threshold temperature and effective accumu? lated temperature of Palomena viridissim (Poda) were studied with green bean as the main host feed. The results showed that at the experimental temperature, the developmental duration of each stage of Palomena viridissim (Poda) was negatively correlated with temperature, and the developmental dura? tion shortened with the increase of temperature. By fitting the relationship model between growth rate and temperature, it is concluded that the two had a significant correlation and accorded with different relationship models. Among the effects of temperature on survival rate, the survival rate of egg and nymph reached the maximum at 22 ℃, but it declined with the continuous increase of temperature. The developmental threshold temperature of egg, nymph, preoviposition and generations were 14.97 ℃ , 7.63 ℃ , 2.68 ℃ and 7.07 ℃ , respectively, and the effective accumulated temperatures were 45.34, 1 007.77, 672.96 and 1 668.04 d·℃. The results could provide a scientific basis for the prediction of the occurrence period and integrated management of Palomena viridissim (Poda).
2022 Vol. 44 (5): 536-540 [Abstract] ( 39 ) [HTML 1KB] [PDF 1323KB] ( 0 )
541 WANG Jing,PIAO Chunhong,WANG Yumei,LIU Junmei,HU Yang,TANG Yufang
Formation and Inhibition of AGEs and ALEs in Sterilization Hot!
The formation of the advanced glycation end products (AGEs) and advanced lipid peroxi? dation end products (ALEs) and the inhibition effects of buckwheat hull extract (BHE) under pas? teurization and autoclaving conditions in glucose/fructose-BSA, linoleic acid-lysine/BSA and soy? bean milk were studied. Amino guanidine (AG) was used as a positive control. The results showed that a large number of AGEs or ALEs were formed in the sterilization of different systems. In the glucose/fructose-BSA system, BHE presented high inhibitory effect on AGEs fermentation, with the highest inhibition rate of 66.55% (80 ℃, 1 h), and its inhibition mechanism was different from that of AG. In the linoleic acid-lysine/BSA system, the inhibitory effect of BHE on the formation of ALEs was also higher than AG, but the inhibition rate was lower than in glucose/fructose-BSA sys? tem. The highest inhibition rate in the linoleic acid-lysine/BSA system was 39.14% (80 ℃, 6 h). Af? ter pasteurization or autoclaving, compared with normal soymilk, the fluorescence value of the soy? milk added BHE decreased significantly by 11.78% (80 ℃ , 1 h), 14.32% (115 ℃ , 20 min) and 14.09%(121 ℃, 20 min), respectively. Buckwheat hull extract can significantly reduce the formation of AGEs and ALEs in food processing, and is of great significance in the processing of low browning foods.
2022 Vol. 44 (5): 541-547 [Abstract] ( 48 ) [HTML 1KB] [PDF 1397KB] ( 0 )
548 ZHAO Wenxuan,JIAO Hongguan,ZHENG Yaqiang
Effects of Pretreatment and Ligninase on Enzymatic Hydrolysis and Saccharification of Corn Stalk
Corn stalk was selected as the research material, enzymatic hydrolysis and saccharifica? tion analysis, Scanning Electron Microscopy and Fourier Transform Infrared Spectroscopy were used as detection indexes, and the high-efficiency pretreatment method and conditions of corn straw were established. The synergistic effects of ligninase, cellulase and xylanase in enzymatic hydrolysis and saccharification were studied, and the optimal addition ratio and amount of lignocellulase in the pro? cess of enzymatic hydrolysis and saccharification were also discussed. The results showed that 2% CaCO3+ 1% H2O2 could remove lignin and retain cellulose and hemicelluloses well at ratio of 1∶11, temperature of 120 ℃, and time of 70 min. Enzymatic hydrolysis saccharification experiment showed that laccase in ligninase played a major role in promoting the hydrolysis of pretreated corn straw, and the optimal addition amount of each ligninase was laccase 8 U/g, lignin peroxidase 10 U/g and man? ganese peroxidase 6 U/g, respectively. Under these conditions, the mixed sugar content in the hydro? lyzate was 116 mmol/L, which was 16% higher than that without ligninase added. This study lays foundation for the establishment of a high-efficiency lignocellulose-degrading complex enzyme sys? tem with low enzyme dosage and high sugar yield and the efficient conversion and utilization of corn stalk lignocellulose raw materials.
2022 Vol. 44 (5): 548-556 [Abstract] ( 35 ) [HTML 1KB] [PDF 2195KB] ( 0 )
557 ZHANG Tian,CHENG Lin,YANG Linlin,HAN Mei,LI Jiasi,YANG Limin
Relationship Between Quality Formation of Scutellaria baicalensis in Spring and Expression of Ecological Factors and Key Enzyme Genes Hot!
To explore the effects of quality change, environmental factors and gene expression of key enzymes on S. baicalensis in spring, the content of 4 monomeric flavonoids and total flavonoids was determined by high performance liquid chromatography and ultraviolet spectrophotometry, respec? tively, the expression levels of 9 key enzymes (PAL, C4H, 4CL, CHS, CHI, FNS, F6H, UBGAT and GUS) in the baicalin synthesis pathway were analyzed by real-time fluorescence quantitative PCR, and environmental parameters were recorded at the same time. In view of the change of the content of medicinal ingredients, it is suggested that the biennial S. baicalensis should be harvested from the end of May to the beginning of June in spring. CHI, GUS, 4CL and PAL were the key enzyme genes that affected the accumulation of medicinal ingredients in root of biennial S. baicalensis in spring. Soil temperature, Ta, RH and TaMin were significantly related to the accumulation of medicinal ingre? dients in root of biennial S. baicalensis in spring. TaMax, rainfall and SWC also had significant effects on the accumulation, while light and short-term heavy rainfall had little effect. Soil moisture and tem? perature had important effects on the accumulation of medicinal ingredients of S. baicalensis, soil moisture and temperature in spring had different effects on root quality of S. baicalensis, and soil tem? perature had a greater effect than SWC. The relationship between spring harvest time of biennial S. baicalensis and the accumulation of its pharmacodynamic components and ecological factors and the expression of key enzyme genes was clarified, which provides a theoretical basis for the determina? tion of the optimal harvest time and the improvement of the quality of S. baicalensis.
2022 Vol. 44 (5): 557-566 [Abstract] ( 57 ) [HTML 1KB] [PDF 1328KB] ( 2 )
567 RONG Han,WANG Zhenxing,SUN Dan,WANG Yue,AI Jun
Chlorophyll Fluorescence Parameters of Schisandra chinensis(Turcz.) Baill“Zaohong”and“Yanhong”
A comparative study of chlorophyll fluorescence parameters was carried out by selecting two varieties of Schisandra chinensis,“Zaohong ”and“Yanhong”cultivated on vertical fence. The re? sults showed that in the OJIP standard curve, the Wk and VJ values of“Yanhong”were larger than “Zaohong”, and the relative variable fluorescence intensity of the leaves was less than“Zaohong”. It shows that the electron donor side and acceptor side of“Yanhong”leaves are more inhibited than “Zaohong”under natural light. The Fv /Fm and PIABS of“Zaohong”were significantly larger than those of“Yanhong”, indicating that the activity of photosystem Ⅱ of“Zaohong”leaves was higher than that of“Yanhong”under the condition of fence. The number of reaction centers per unit area (RC/CSO) of the“Yanhong”was less than“Zaohong”, and the unit reaction center absorption (ABS/RC) and cap? tured light energy (TRO/RC) were higher than“Zaohong”. All of them indicate that the reaction cen? ter of the“Yanhong”fence leaves is inactivated, the electron transfer is inhibited, and the photosyn? thetic capacity is also reduced compared with“Zaohong”. The photosynthesis characteristics of Schisandra chinensis (Turcz.) Baill cultivar“Zaohong”and“Yanhong”are quite different, and it is of great significance to carry out research on targeted cultivation methods.
2022 Vol. 44 (5): 567-571 [Abstract] ( 47 ) [HTML 1KB] [PDF 2065KB] ( 0 )
572 SAIYAREMU Halifu,DENG Xun,SONG Xiaoshuang,SONG Ruiqing
Seasonal Variation of Soil Nutrients and Fungal Community Structure in Rhizosphere of Susceptible and Non-susceptible Pinus sylvestris var. mongolica Plantations
Pinus sylvestris var. mongolica has the characteristics of strong resistance and fast growth, which plays an important role in sand control project in north China. In recent years, the changes of environmental conditions have led to the weakening of the growth of P. sylvestris var. mongolica plan? tation in Zhanggutai area, Liaoning province, and the serious occurrence of shoot blight disease. In this study, the physical and chemical properties of rhizosphere soil, the variation of fungal commu? nity structure and the effects of soil physical and chemical properties on fungal community structure of susceptible and non-susceptible P. sylvestris var. mongolica plantations in Zhanggutai area of Lia? oning Province were analyzed by high-throughput sequencing and qPCR technology. The results showed that at phylogenetic level, Ascomycota, Basidiomycota, Mortierellomycota and Fungiunclassified were the main flora. There were significant differences in the abundance of ck soil samples and ss soil samples(P<0.05). There were 30 genera with different abundance at genus classi? fication level. The content of 30 genera in ck soil samples was significantly higher than that in ss soil samples(P<0.05), all of which are mycorrhizal fungi, dark septal fungi, Trichoderma and other probiotics. RDA analysis showed that pH, OM, TN, NH4 + , NO3 - , AP, TP, AK and TK were the main environmental factors affecting the fungal community structure in spring and summer, and 30 gen? era with significant differences were the main factors affecting the microbial community structure in autumn.
2022 Vol. 44 (5): 572-585 [Abstract] ( 38 ) [HTML 1KB] [PDF 2721KB] ( 0 )
586 LU Mengzhao,LIU Mei,CHEN Guang,WANG Xuefeng
Effects of Ganoderma lingzhi Continuous Cropping on Soil Physicochemical Properties and Nematode Community Hot!
Soil nematodes are an important part of soil animal community, and changes in their com? munity structure can effectively indicate soil environment and health status. In the present study, the relationship between composition of nematode communities and environmental factors at different soil depths were studied based on Ganoderma lingzhi cultivation soil samples of different continuous cropping years (first year, 2 years and 3 years of cultivation) collected from the Ganoderma lingzhi planting base in Huangsongdian. The results revealed that the content of organic matter (OM), avail? able phosphorus (AP), available potassium (AK) and ammonia nitrogen (AN) and soil pH were signifi? cantly reduced. A total of 21 genera of nematodes were identified in continuous cropping soil. Bacte? riophagous nematode group and fungus-eating nematode group are both dominant nutrient groups in continuous cropping soil, up to 1 580 (per 100 g of soil) in the topsoil cultivated for 2 years and 640 (per 100 g of soil) in the topsoil cultivated for 3 years. The abundance of nematodes in the soil for 2 years of cultivation was significantly higher than that in the first year and 3 years (P<0.05) and it was significantly higher in the topsoil than that in the middle and bottom soils (P<0.05), up to 2 686 (per 100 g of soil) in the topsoil. Shannon-Weiner diversity index (H′), species richness (SR), nema? tode chanel ratio (NCR) and nematode maturity index (MI) decreased, dominance index (λ) and fungus-bacteria-eating nematode ratio (F/B) increased with the increase of continuous planting years. The numbers of Aphelenchoides, Protorhabditis and Prodorylaimus were significantly positively corre? lated with soil pH, available phosphorus (AP) and ammonia nitrogen (AN) contents (P<0.05).
2022 Vol. 44 (5): 586-594 [Abstract] ( 45 ) [HTML 1KB] [PDF 1643KB] ( 0 )
595 DU Shuai1,WANG Qi,CHANG Tianying,SONG Zhisong,ZHANG Hui4,LI Qingjie, WANG Quankai
DNA Molecular Identification of Sika Deer Skin and Its Adulterants Based on COI Barcode Sequence Hot!
Based on COI barcode sequence, DNA molecular identification was carried out on the genuine raw materials of Manchu medical deer skin gum, sika deer skin and its adulterants (red deer, deer and other deer species similar to sika deer are regarded as adulterants), and NJ tree was estab? lished to analyze the difference between the genuine sika deer skin and the adulterated sika deer skin, so as to establish a fast and effective identification method of authenticity. The results showed that in the NJ tree, all the samples of the genuine sika deer skin were clustered into an independent branch, with a 100% support rate and obvious unilinearity. The adulterated samples were also aggre? gated into a single branch, with a support rate of 100%. This study proves that DNA barcode technol? ogy based on COI sequence can effectively identify the genuineness of sika deer skin,which provides a new scientific method for authenticity identification of sika deer skin, a traditional Manchu medici? nal material.
2022 Vol. 44 (5): 595-600 [Abstract] ( 43 ) [HTML 1KB] [PDF 1507KB] ( 0 )
601 GAO Yi,LIU Hongliang,YU Yongsheng,LI Zhaohua,JIN Xin,ZHANG Guoliang,LI Na
Traits of Muscle Fiber in Different Parts of Berkshire×Landrace× Yorkshire Porcine Hybrid Pigs
In order to explore the muscle fiber traits of different parts of pigs, four tissues of longissi? mus dorsi, psoas major, subscapularis and adductor of berkshire×landrace×yorkshire (BLY) hybrid pigs were studied. The diameter, cross-sectional area and density of muscle fibers in different parts were observed by HE staining, and the expression percentage of fast and slow muscle fibers in differ? ent parts was detected by immunohistochemistry. Finally, qPCR was used to analyze the expression of MyHCⅠ/MYH7 (slow oxidizing type), IIa/MYH2 (fast oxidizing type), IIx/MYH1 (oxidation and gly? colysis type) and IIb/MYH4 (fast glycolysis type) genes in the muscles of different parts. The results showed that fast muscle fibers accounted for 76%-91% in longissimus dorsi, psoas major, adductor and subscapularis muscles, and slow muscle fibers accounted for 9%-23%. Subscapularis muscle had the best meat quality with the highest muscle fiber density and the highest content of oxidized muscle fibers. The muscle fiber density of psoas major was the lowest and the lowest content of oxi? dized muscle fibers was longissimus dorsi muscle. The study aims to collect data for the improvement of pig breeding and muscle quality by analyzing the muscle fiber traits in different parts of pigs.
2022 Vol. 44 (5): 601-606 [Abstract] ( 44 ) [HTML 1KB] [PDF 11004KB] ( 0 )
607 SONG Yupu,ZHANG Lei,CHANG Xiaofei,GUO Chanying,ZONG Yanfeng,SUI Yu? jian,SUN Yongfeng
Expression of FGFR3 Gene in Embryonic Skin Follicles of Goose and Chicken
Zi goose and "Jingbai 1" chicken were used for routine observation of skin tissue by hema? toxylin and HE staining.The expression trends of FGFR3 mRNA and its target proteins at three im? portant developmental time nodes(goose embryonic day 13,18,28 and chicken embryonic day 9,12, 18) in goose and chicken were investigated by quantitative PCR and Western-blot.The expression of FGFR3 mRNA showed a significant trend(P<0.05) with follicle development in goose skin, but the opposite trend was observed in“Jingbai1”chicken.As expected from the WB results, the target pro? tein expression all decreased significantly with hair follicle growth and development.Taken together, FGFR3 may be involved in the regulation of hair follicle growth and development, showing a pro dif? ferentiation role during hair follicle differentiation.
2022 Vol. 44 (5): 607-612 [Abstract] ( 44 ) [HTML 1KB] [PDF 1975KB] ( 0 )
613 LI Minghan,ZHAO Quan
Isolation, Identification and Genome-wide Analysis of Bacillus licheniformis from Chicken Hot!
Through a variety of methods, such as bacterial morphology,physiological and biochemi? cal characteristics and 16S rRNA sequencing, the strain isolated from layer feces was identified as Bacillus licheniformis.The probiotic effect of Bacillus licheniformis LH96 was evaluated by the in vi? tro method, and it was found that it reached a stable period at 14 h, and it had good heat resistance. It had good tolerance under the conditions of pH 2.5-5.0,0.1%-0.3% bile salt concentration and simu? lated artificial gastrointestinal fluid. B. licheniformis LH96 had the ability to produce a variety of short-chain fatty acids, of which the ability to produce acetic acid was the strongest.The results of the antibiotic resistance test showed that the strain was resistant to azithromycin, clindamycin and eryth? romycin.At the same time,the whole genome information of B.licheniformis LH96 was obtained by gene assembly.The results showed that the strain was 4 187 148 bp, with a G+C content of 46.18% and a total of 4 263 protein coding sequences. The strain contains a large number of genes related to carbohydrate metabolism, as well as glycoside hydrolases, polysaccharide lyases and carbohydrate es? terases. The enzymes in these metabolic pathways can help break down nutrients such as starch, cel? lulose and pectin that chickens cannot digest.The results provide a genetic basis for further elucidat? ing the functional mechanism of its probiotic properties.
2022 Vol. 44 (5): 613-623 [Abstract] ( 35 ) [HTML 1KB] [PDF 3633KB] ( 0 )
624 YANG Zhiyong,YANG Lan,LI Denglai,LI Liang,ZHU Rui,YU Zhe,WU Li? fang
Effects of Replacing Fish Meal with Different Soybean Protein Sources on Growth Performance, Protease Activities and Immune Indices of Carassius auratus Hot!
In order to study the effects of expanded soybean meal,fermented soybean meal and soy? bean meal on the growth,protease activity,protein metabolism enzyme activity and non-specific im? mune indices of Carassius auratus, this experiment took Carassius auratus with an initial body weight of (43.31±2.11)g/tail as the research object.In the compound feed of Carassius auratus, expanded soybean meal, fermented soybean meal and soybean meal were used to replace 60% fish meal, and formulated into 4 kinds of compound feeds which were the control group(ck), expanded soybean meal group(ESBM), fermented soybean meal group(FSBM) and soybean meal group(SBM)with equal nitrogen and fats. An 8-week breeding trial was conducted in an indoor temperature-controlled single-cycle breeding system.After the feeding experiment, the protease activity was determined by the Folin-phenol reagent method, the activities of GPT, GOT, AKP, SOD and LZM in hepatopancreas were determined by Nanjing Jiancheng kit.These results show that the specific growth rate of Caras? sius auratus in the FSBM group was higher than that in the SBM group(P<0.05); the protein effi? ciency ratio of Carassius auratus in the FSBM group was lower than that in the ck group(P<0.05); the protease activity of Carassius auratus's hepatopancrea, fore intestine, middle intestine and hind intestine in the FSBM group was lower than that in the ck group (P<0.05); the protease activity of Carassius auratus's hepatopancrea and hind intestine of the FSBM group was higher than that of the ESBM group and SBM group(P<0.05); the GPT activity of Carassius auratus in the FSBM group was lower than that in the ck group(P<0.05); the AKP activity of Carassius auratus in the FSBM group was lower than that of the ESBM group(P<0.05); the SOD activity of Carassius auratus in the FSBM group was higher than that in the SBM group(P<0.05).In summary, under the experimental conditions, when the proportion of ESBM, FSBM and SBM replacing fish meal in Carassius auratus compound feed is 60%, the effect of FSBM replacing fish meal is the best, the effect of ESBM is the second, and the effect of SBM is the worst.
2022 Vol. 44 (5): 624-630 [Abstract] ( 41 ) [HTML 1KB] [PDF 1287KB] ( 0 )
吉林农业大学学报
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Copyright 2009 Journal of Jilin Agricultural Univerisity
 No.2888 of Xincheng Dajie,Changchun City,Jilin Province(130118)
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