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“双一流”畜牧学科大学生新时代“三下乡”社会实践教学改革

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黑龙江农业科学 2024年第9期 91-96页

作者：窦秀静王鑫王羿阳盛一于文皓毕重朋董娜单安山东北农业大学动物科学技术学院黑龙江哈尔滨150030

大学生“三下乡”以青春之力助力乡村实践是中国当代农业高校大学生专业素质培养和育人教育与时俱进的重要载体。在乡村振兴大背景下,农业高校在校大学生是乡村发展过程中重要的劳动参与者与知识传递者。本文以东北农业大学“双一流”... 详细信息

大学生“三下乡”以青春之力助力乡村实践是中国当代农业高校大学生专业素质培养和育人教育与时俱进的重要载体。在乡村振兴大背景下,农业高校在校大学生是乡村发展过程中重要的劳动参与者与知识传递者。本文以东北农业大学“双一流”建设畜牧学科大学生“三下乡”助农实践小队实践过程为例,对实践过程中出现的问题进行总结和剖析、寻找解决方案。以“实践内容创新、实践总结全面、实践分析透彻、实践意义重大”为实践理念,充分发挥社会实践的作用。通过以小见大,以点引面,总结当前“三下乡”活动中的创新和不足,提高“三下乡”社会实践的可行性与创新性,为今后的大学生乡村振兴“三下乡”社会实践提供经验,更好地服务乡村发展,培养肩负重任的社会人才。

关键词： “三下乡”社会实践乡村振兴农业高校

Effects of Chinese herbs on lactation of rat and performance of offspring

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Journal of Northeast Agricultural University(English Edition) 2007年第1期14卷 22-26页

作者： SHI Baoming shan anshan Institute of Animal Nutrition Northeast Agricultural University Harbin 150030 China

An experiment was conducted to study the effects of different Chinese herbs on lactation in the rat. Seventy-two Sprague Dawley female rats at gestation day 18 were assigned to 9 groups randomly, with 8 rats each. Control rats were offered basal diets until the end of the weaning period. Rats in the other 8 groups were administered diets supplemented with 1% Medulla tetmpanacis （MT）, Astragalus membranacens （AM）, Vaccaria segetalis （VS）, Leonurus heterophyllus sweet （LHS）, Radix rehmarmiae preparata （RRP）, Squama man/t/s （SM）, Schisandra chinensis （SC）, Ligustrum lucidum （LL）, respectively. After parturition, the litter size was culled to 8 pups per dam. Pup weight and milk yield were significantly higher in the VS, LHS, AM and SM groups than these in the control group during middle and late lactation （P〈0.05 or P〈0.01）. The weight and feed intake were not different in the dams fed either diet.

关键词： rat lactation Chinese herbs

Effects of Rumen Protected Methionine on Milk Yield and Milk Composition in Earlier Lactating Cow

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Journal of Northeast Agricultural University(English Edition) 2008年第2期15卷 30-32页

作者： SUN Manji shan anshan Institute of Animal Nutrition Northeast Agricultural University Harbin 150030 China

A total of 12 mature healthy Holstein dairy cows of the nearly body weight （580±30） kg, milk yield （22.5±2.8） kg in the early stages of lactation were selected in this experiment. The cows were randomly divided into 2 groups, every group had 6 cows, every group had 6 repeats, and every repeat had 1 cow. Added 20 g protected methionine in earlier lactating cow food every day. The results showed that protected methionine increased milk yield by 10.83%, testing group milk yield was significantly different than that of control （P〈0.05）; protected methionine increased milk fat by 5.98%, testing group milk fat was significantly different than that of control （P〈0.05）; Milk protein increased by 2.15%, but bad insignificantly different （P〉0.05）; dry matter of milk had the tendency of decrease, but had insignificant difference （P〉0.05）.

关键词： methionine earlier lactating period milk yield milk composition

Detection and Analysis of 1,2-propanediol Content in Whole-crop Silage Corn

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Animal Husbandry and Feed Science 2017年第4期9卷 239-242页

作者： Li Yanbing Li Jingchun shan anshan College of Animal Science and Technology Northeast Agricultural University College of Animal Science and Technology Heilongjiang Bayi Agricultural University

[ Objective ] The paper was to investigate the content of 1,2-propanediol in silage feed. [ Method ] Whole-crop corn was stored in laboratory bag silos and outdoor bunker silos. Bag silos were stored for 3, 7, 14, 28, 56 and 120 d, respectively, and fermentation products were analyzed after opening; the fermentation products, which were from three 500 t above-ground outdoor bunker silos stored for 120 d, were detected. Eight sampling points were selected for each bunker silo. [ Result] No 1,2-propanediol was detected out in laboratory bag silos, and lactic acid was dominant in fermentation products. The acetic acid content significantly increased （ P 〈 0.05 ） with the extension of storage time, whereas the acetic acid content was kept below one-third of the lactic acid content ; 1,2-propanediol and a small amount of 1-propanol were detected out in three bunker silos, and lactic acid was dominant in fermentation products, whereas the content of acetic acid was slightly lower than that of lactic acid. The differences in fermentation products from different silos and different sites in silos presented heterogeneity; except to propanediol, lactic acid bacteria and yeast, there was no significant difference in fermentation products at the top and bottom layers of silos （ P 〉0.05 ） ; there were significant differences in contents of lactic acid, acetic acid, 1,2-propanediol, and yeast between the outer and inner parts of silos （P 〈 0.05 ） ; except to pH values and acetic acid, there were significant differences in fermentation products between hunker silos （P 〈0. 05）. [ Conclusion] No 1,2-propanediol is detected out in laboratory bag silos due to relatively simple fermentation products. However, 1,2-propanediol can be detected in the bunker silos due to complex outdoor environment for silage, and the microorganisms producing 1,2-propanediol exist in silos.

关键词： Silage 1,2-propanediol Whole-crop corn Fermentation product Silo

Effects of temperature,moisture and choline chloride on vitamin A stability in broiler premix

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Journal of Northeast Agricultural University(English Edition) 2007年第2期14卷 115-119页

作者： SUN Haixia shan anshan SHI Baoming Institute of Animal Nutrition Northeast Agricultural University Harbin 150030 China Northeast Institute of Geography and Agricultural Ecology Chinese Academy of Sciences Harbin 150040 China

A 2×2×2 factorial design was adopted to study the effects of temperature, moisture and choline chloride on vitamin A stability in premix. The results indicated that temperature, moisture and choline chloride damaged vitamin A significantly. The regression equations of vitamin A disappearance rate and storage time were as follows： in room temperature （18±3）℃, y=14.368Ln（x）＋ 4.1425, R^2=0.978; in high temperature （4 ℃ ）, y=22.24Ln （x）＋13.27, R^2=0.9918; in low moisture （2%-3%）, y= 10.408Ln （x）＋9.5418, R^2=-0.9322; in high moisture （8%-9%）, y=26.199Ln（x）＋7.8741, R^2=-0.9949; in the condition of choline chloride flee, y=9.5125Ln（x）＋ 8.9869, R^2=0.9826; supplemented with choline chloride, y=27.094Ln （x）＋8.4276, R^2=0.9984. Temperature had highly significant interaction with moisure and choline chloride on destruction of vitamin A, respectively from the periods of two months storage. However, from the period of the first month storage, the interaction of moisture and choline chloride, as well as the interaction of temperature, moisture and choline destroyed vitamin A remarkably.

关键词： vitamin A temperature moisture choline chloride stability

Influence of Early Quantitative Feed Restriction on Performance and Carcass Characteristics of Broiler Chickens

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Journal of Northeast Agricultural University(English Edition) 2006年第2期13卷 140-144页

作者： SHI Baoming shan anshan CHAN Long Institute of Animal Nutrition Northeast Agricultural University Harbin Heilongjiang 150030 PRC

An experiment was conducted to study the influence of eady quantitative feed restriction on the performance and carcass characteristics of broiler chickens. Two hundred 8-day-old commercial Avian male broiler chicks were assigned to four groups randomly, with 50 broilers each. At the age of 8 days the broilers were restricted to 90%, 80% or 70% of the ad libitum intake for 7 days. When the restricion was finished, all birds received feed ad libitum again. The results showed that diet restriction resulted in a reduction in body weight and daily gain during the restriction period （P 〈0.05）. The birds restricted to 90% of the ad libitum intake showed the occurring of growth compensation in the 3rd week. The birds restricted to 80% and 70% of the ad libitum intake had growth compensation in the 4th week. No significant differences between the effects of the restriction and the control on final body weight, growth rate, feed conversion efficiency and carcass characteristics （P 〈0.05）.

关键词： broiler, early feed restriction performance carcass characteristics

Study on HPLC method to determine contents of Schisandrin A and Schisandrin B in Schisandra chinensis extraction

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Journal of Northeast Agricultural University(English Edition) 2007年第4期14卷 323-326页

作者： XU Liangmei LI Jianping YAN Changjiang shan anshan College of Animal Science and Technology Northeast Agricultural University Harbin 150030 China

The determination method of Schisandrin A and Schisandrin B in Schisandra chinensis was improved with the high performance liquid chromagraphy （HPLC）. The sample was extracted exceedingly in the critical limit of CO2. The retention time of Schisandrin A and Schisandrin B was reduced, with methano/water （75 ： 25） as mobile phase. The wavelength for detection was 254 nm. The R^2 of standard curve was 0.9998 and the relative standard deviation was 2.31% and 3.17% with the recovery of 96.45% and 97.37%, respectively. The result shows that the rate of veracity of this method is higher and it proves that the determination method of Sehisandrin A and Schisandrin B in Schisandra chinensis is a feasible method.

关键词： HPLC Schisandra chinensis Schisandra A Schisandrin B

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种母鸡饲粮锌和钙水平对子代雏鸡的影响

畜牧兽医学报 1991年第3期22卷 219-224页

作者：单安山东北农学院

试验观测了种母鸡饲粮锌和钙水平对子代雏鸡的影响和子代的补偿作用。结果表明,母子两代饲粮都未加锌时子代雏鸡增重和采食量显著降低(P0.05)。母子两代饲粮都未加锌时子代血清总蛋白含量最低,子代加锌有一定的补偿作用。种母鸡饲粮高... 详细信息

试验观测了种母鸡饲粮锌和钙水平对子代雏鸡的影响和子代的补偿作用。结果表明,母子两代饲粮都未加锌时子代雏鸡增重和采食量显著降低(P0.05)。母子两代饲粮都未加锌时子代血清总蛋白含量最低,子代加锌有一定的补偿作用。种母鸡饲粮高钙使子代雏鸡血清总蛋白(P0.05)。

关键词：鸡子代雏鸡锌钙饲料种鸡

Toxic effects of phoxim on rats and the protective role of vitamin E

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Toxic effects of phoxim on rats and the protective role of v...