施氮对新灌区不同间套种植模式产量及茬口养分特性的影响  

Effect of N application on yield and stubble nutrient characteristics of intercropping patterens in new irrigation area of Gansu

作　　者：黄鹏[1] 张恩和[1] 柴强[1] 

机构地区：[1]甘肃农业大学农学系,甘肃兰州730070

出　　处：《草业学报》2001年第1期86-91,共6页Acta Prataculturae Sinica

基　　金：甘肃省自然科学基金资助项目 :;新灌区水肥资源持续高效利用途径研究! ( ZS981- A 2 1- 0 37N )

摘　　要：在甘肃秦王川新灌区的大田试验表明 ,春小麦 / /蚕豆、春小麦 /油菜、春小麦 /马铃薯及春小麦 / /草木樨等 4种间套种植模式均能提高农田的生产力 ;豆科作物与牧草能显著地改善耕层的茬口养分特性 ,草木樨茬口不但速效养分含量高于其他模式 ,对提高土壤有机质和降低土壤容重也有明显效果。施氮能显著提高各种植模式的综合经济产量 ,但过量施氮时增产效果又有所下降 。A study on four intercropping patterns was carried out in the Qinwangchuan New Irrigation Area of Gansu Province. It included intercropping of spring wheat with broad bean, rape seed, potato and sweet clover, respectively. The result showed that the productivity per unit of farmland was increased through intercropping practices and the leguminous plants could improve the nutrient characteristics significantly in the cultivation layer of soil. Application of N fertilizer had significant effect on increasing the yield, but with some negative effect on stubble Olsen P content.

关 键 词：新灌区 间套种植 施氮水平 产量 茬口养分特性 

分 类 号：S344.3[农业科学—作物栽培与耕作技术] [农业科学—农艺学] S143.1