模拟轮牧条件下黄土高原三叶草产量与营养品质的预测  

Prediction of forage yield and quality of clover in Loess Plateau under simulated rotational grazing

作　　者：石丽娜 杨天辉[1,2] 常生华 侯扶江[1] SHI Lina;YANG Tianhui;CHANG Shenghua;HOU Fujiang(State Key Laboratory of Grassland Ago-ecosystem/Key Laboratory of Grassland Livestock Industry Innovation,Ministry of Agriculture/College of Pastoral Agriculture Science and Technology,Lanzhou University,Lanzhou 730020,Gansu,China;Institute of Animal Science,Ningxia Academy of Agricultural and Forestry Sciences,Yinchuan 750002,Ningxia,China)

机构地区：[1]草地农业生态系统国家重点实验室/农业部草牧业创新重点实验室/兰州大学草地农业科技学院,甘肃兰州730020 [2]宁夏农林科学院动物科学研究所,宁夏银川750002

出　　处：《草业科学》2019年第8期2050-2060,共11页Pratacultural Science

基　　金：长江学者和创新团队发展计划项目(IRT-17R250);甘肃省现代草食畜产业技术体系(GARS-08);甘肃省退牧还草科技支撑(2018001、GH2016-TMHC001)

摘　　要：为探究黄土高原地区三叶草(Trifolium)的产量、营养品质与生长时间、≥0℃积温之间的关系,本研究以白三叶(Trifolium repens‘KopuⅡ’)、红三叶(Trifolium pretense‘Sensation’)为对象,通过模拟轮牧试验,分析生长时间、≥0℃积温与其产量、中性洗涤纤维、酸性洗涤纤维、粗蛋白、粗脂肪、可溶性碳水化合物、粗灰分含量之间的相关性。结果表明,两种三叶草的生长时间、≥0℃积温与其产量及各营养指标之间显著相关(P<0.05),据此建立了利用三叶草生长时间和≥0℃积温预测其产量和品质的Ⅱ类估测模型。预测模型准确性较高,可以为黄土高原地区三叶草的栽培管理和收获利用提供科学依据。To investigate the relationship between forage yield,nutritional quality of clover,growth time,and≥0℃accumulated temperature,Trifolium repens‘KopuⅡ’and Trifolium pretense‘Sensation’were used.The correlation between growth time and≥0℃accumulated temperature,and forage yield,neutral detergent fiber,,acid detergent fiber,crude protein,ether extract,water soluble carbohydrate,and ash content through simulated rational grazing field experiments were analyzed.The results showed that growth time and≥0℃accumulated temperature of clover were significantly correlated with forage yield and each nutrient index(P<0.05).Accordingly,forage yield and nutritional quality of clover were predicted based on the growth time and≥0℃accumulated temperature.The accuracy of these prediction models was hiand they could provide a scientific basis for the cultivation, management, and harvest of clover in the Loess Plateau.

关 键 词：白三叶 红三叶 生长时间 ≥0℃积温 产量 品质 代谢能 

分 类 号：S541.209[农业科学—作物学]