灌溉对粮饲兼用玉米根系分布及产量影响  

The effect of irrigation amounts on root distribution and yield of forage maize

作　　者：潘菊梅[1] 李辛村[2] 李涛[1] 齐广平[1,3] 

机构地区：[1]甘肃农业大学工学院,兰州730070 [2]甘肃农业大学农学院,兰州730070 [3]甘肃农业大学草业学院,兰州730070

出　　处：《干旱区资源与环境》2012年第11期200-203,共4页Journal of Arid Land Resources and Environment

基　　金：博士后基金项目;现代农业产业技术体系建设专项资金资助

摘　　要：通过大田试验,在灌溉量2700m3/hm2、3600m3/hm2、4500m3/hm2条件下,对粮饲兼用玉米根系分布特征及产量影响进行了研究。结果表明:1)3600m3/hm2的灌溉量在0～40cm土层的土壤含水率较充分灌溉显著提高4.78%～19.3%;2)各灌溉条件下,根系随生育进程不断向下发展,随灌溉量的减少,根系有向深层发展的趋势;3)3600m3/hm2的灌溉条件下,粮饲兼用玉米籽粒产量较充分灌溉显著提高11.3%;4)秸秆产量在充分灌溉条件下较高,尤其在抽雄至乳熟期达到最高。The effect of root distribution trait and yield of forage maize were studied in the field experiment under the irrigation amounts of 2700m3/hm^2,3600m3/hm^2,4500m3/hm^2.The results showed that 1）The soil moisture within 0-40cm soil layer was improved markedly by 4.78%-19.3% under 3600m3/hm^2 compared with full irrigation;2） For all irrigation amounts,the roots grew downward continuously with the development process.When the irrigation amount was reduced,the root system showed the trend of developing downward;3）Under the irrigation amount of 3600m3/hm^2 the grain yield of forage maize was improved by 11.3% compared with full irrigation;4） The straw yield was higher under the full irrigation amount.Especially,the straw yield was the highest from tasseling stage to milk stage.

关 键 词：粮饲兼用玉米 土壤水分 根系分布 产量 

分 类 号：S152.75[农业科学—土壤学]