玉草2号、川单14×墨西哥大刍草和墨西哥大刍草产量和饲用价值比较  

Comparisons on Forage Yield and Feeding Value Between Zea mexicana, Yucao2 and Chuandan14-Zea mexicana Hybrid

作　　者：冯云超[1,2] 唐祈林[1] 荣廷昭[1] 

机构地区：[1]四川农业大学玉米研究所,四川雅安625014 [2]重庆三峡农业科学院,重庆万州404001

出　　处：《玉米科学》2011年第3期68-72,共5页Journal of Maize Sciences

基　　金："973计划"项目(2007CB108907);国家自然科学基金项目(30671308;31071432);国家支撑计划项目(2007BAD89B15-1);教育部创新团队发展计划(IRT0453);饲草玉米育种攻关项目

摘　　要：采用裂区设计,对不同种植密度下玉草2号、川单14×墨西哥大刍草和墨西哥大刍草产量以及最适密度下饲用价值进行研究。结果表明,在试验设计的密度下,玉草2号鲜、干草产量均最高,川单14×墨西哥大刍草其次,墨西哥大刍草最低;3种饲草其鲜、干草产量随密度增加呈"低—高—低"的变化趋势。最适密度下饲用价值比较表明,玉草2号和川单14×墨西哥大刍草粗蛋白、酸性洗涤纤维、中性洗涤纤维和粗脂肪4种饲用成分产量均显著或极显著高于墨西哥大刍草,其粗蛋白和粗脂肪含量均低于墨西哥大刍草;玉草2号和墨西哥大刍草相对饲用价值差异不显著,均显著高于川单14×墨西哥大刍草。To understand the forage yields in different planting density as well as their feeding value in the optimum density, a field experiment which Zea mexicana and Zea mays-Zea mexicana hybrids （Yucao2 and Chuandanl4 × Zea mexicana） used as the materials were designed by random block split plot design investigated. The main results were that the fresh and dry matter yields of the three forages, which showed the change of ＂low^-high-low＂ with the increase of planting density. The fresh and dry matter yields were the highest in the Yucao2 and the lowest in Zea mexicana among all planting density. The yields of crude protein （CP）, acid detergent fiber （ADF）, neutral detergent fiber （NDF） and ether extract（EE） in Yucao2 and chuandanl4 ×Zea Mexicana were higher than in Zea mexicana significantly or high significant, however, the content of CP and EE was the highest in Zea Mexicana. The relative feeding value（RFV） in Yucao2 had no significance with that in Zea mexicana and were higher than in chuandanl4× Zea mexicana significantly.

关 键 词：玉草2号 墨西哥大刍草 产量 饲用价值 

分 类 号：S513.024[农业科学—作物学]