苜蓿+玉米间作系统饲料生产潜力的评定  

An evaluation of forage potential of an alfalfa+maize intercropping system

作　　者：张桂国[1,2] 杨在宾[1] 董树亭[2] 

机构地区：[1]山东农业大学动物科技学院,山东泰安271018 [2]作物生物学国家重点实验室山东农业大学农学院,山东泰安271018

出　　处：《草业学报》2011年第2期117-126,共10页Acta Prataculturae Sinica

基　　金："十一五"国家科技攻关项目(2006BAD15B07-03);国家科技支撑计划项目(2007BAD31B04);国家自然科学基金项目(30571098;30771282)资助

摘　　要：本试验目的在于探讨不同苜蓿+玉米间作模式下营养物质生产能力及其瘤胃可降解养分产量的差异,从而对玉米+苜蓿间作系统饲料生产能力作出合理的评定。试验设苜蓿、玉米行数比分别为2∶2,3∶2,4∶2,5∶2四个间作处理,每处理3个重复,其所占间作面积比分别为33%∶67%,43%∶57%,50%∶50%,55%∶45%,玉米、苜蓿单作为对照组。通过测定各处理干物质产量、营养物质产量、养分瘤胃降解率,从而可以对不同间作模式下可降解营养物质产量及总可降解养分产量等指标进行比较,对不同间作系统饲料生产能力进行综合评定。结果表明,苜蓿+玉米间作系统与玉米和苜蓿单作系统相比,提高了单位间作面积总干物质产量、营养物质的产量,营养物质瘤胃降解率和瘤胃可降解养分产量,具有更高的饲料生产潜力,是一种可行的饲料生产模式,本试验条件下5∶2间作模式表现出最佳的生产优势。The nutrient production performance of different alfalfa（Medicago sativa）＋maize（Zea mays） intercropping systems and the discrepancy of rumen degradable nutrients yields were studied to make a comprehensive assessment on the forage potential of these intercropping systems.Four intercropping treatments（alternating alfalfa and maize rows in a 2∶2,3∶2,4∶2,5∶2,design） with three replicates and intercropping area rates of 33%∶67%,43%∶57%,50%∶50%,55%∶45%,respectively were established.Pure stands of maize and alfalfa were used as the control groups.Dry matter yields,nutrient yields,and rumen degradability of nutrients were measured to make comparisons of degradable nutrients output and total degradable nutrients of the different alfalfa＋maize intercropping systems.A comprehensive assessment was made of forage potential.The alfalfa＋maize intercropping system improved total dry matter and nutrient yields per unit of intercropped land and enhanced nutrients rumen degradability and production of total degradable nutrients,with a higher feed production potential compared with pure stands of maize or alfalfa.Under the conditions of this experiment,the 5∶2 intercropping patterns gave the best production.

关 键 词：苜蓿 玉米 间作 饲料生产潜力 

分 类 号：S541.9[农业科学—作物学] S513