摘要： 为解决东北农牧交错区夏秋季饲草短缺问题,在玉米乳熟至完熟期间,对玉米植株进行不同组合方式的去叶以收获叶片做粗饲料进行了研究。结果表明:随着生育期的延长,在某些阶段去叶不降低籽粒产量,并且可获得相当于1～2 hm²草地饲草的生产量。同时,收获的粗饲料的粗蛋白、消化率和代谢能都维持在相对较高的水平,粗蛋白含量为5.01%～8.48%,干物质体外消化率为53.43%～64.65%,代谢能在6.84～8.51 MJ/kg。在东北农牧交错区,玉米生长后期去叶可以作为收获粗饲料的途径。

关键词: 玉米, 去叶, 优质粗饲料, 籽粒产量

Abstract: The roughage harvested from corn by different combinations of defoliation was studied during milk ripe and full ripe stage for solving feed shortage of the ecotone between agriculture and animal husbandry in Northeast China during summer and autumn.The results showed that defoliation(cutting the top)at some stages could not reduce grain yield,and could harvest much forage,which was about equivalent to forage yield of 1-2 hectares grassland.Meanwhile,the concentrations of crude protein and metabolizable energy and digestibility of haversted roughage were maintained at a relatively high level.The content crude protein was 5.01%-8.48%DM,in vitro dry matter digestibility ranged from 52.74% to 64.65% DM,metabolizable energy concentration was between 6.84-8.51 MJ/kg DM.Defoliation at late growth stage of corn can offer high quality roughage for the ecotone between agriculture and animal husbandry in Northeast China.

Key words: Corn Defoliation, High quality roughage, Grain yield

中图分类号: 

• S513.01