草业学报2017，Vol.26Issue(10)：46-55,10.DOI:10.11686/cyxb2017162
西北灌区薯/豆连续套作对系统产量及土壤肥力的影响
Crop yield and soil fertility affected by continuous potato/soybean intercropping systems along the Yellow River
摘要
Abstract
The objective of this work was to explore the mechanisms for the yield advantage of a potato/soybean continuous intercropping system.Potato,variety Kexin 4 and soybean,variety Jidou 12 were used in a longterm field experiment undertaken from 2011 to 2014 in Guochen,Huining County,Gansu Province in the Northwest irrigation district.The treatments included potato monocropping (PM),soybean monocropping (SM),potato-soybean rotational system (P-S),potato/soybean continues intercropping (IC) and potato/soybean rotational intercropping (IR).The influences of different cultivation systems on crop yields and soil fertility were analyzed.Continuous intercropping systems produced higher yields;IC and IR treatments enhanced yield by 28.5％-254.1％ and 39.4％-284.0％ compared with PM and SM,respectively and by 57.5％ to 70.8％ compared with P-S.There was no difference in yield between IC and IR in 2011 and 2012 but in 2013 and 2014 IR yield was significantly higher than those of PM,SM,IC and P-S,achieving 9913 kg/ha and 9590 kg/ha,respectively.Cultivation system influenced yield over time.For PM,yield was stable after 1 year but declined significantly by 22.1 ％ and 42.1％ after two and three years of continuous cropping,respectively.The SM and IC treatments significantly reduced yields by 31.2％-53.6％ and 13.9％-24.2％ after two years,respectively.The P-M and IR treatments did not influence yield over the four years of the study.Topsoil fertility was improved to some extent by different cultivation systems;Olsen P＞available N＞total N＞total P＞available K＞organic carbon＞total K＞pH.Topsoil fertility in the IC and IR treatments decline after four years of continuous cropping compared with PM,SM and P-S;Olsen P and available K decreased by 26.2％-42.9％ and 18.5％-30.2％,respectively.The results of this study showed that potato/soybean intercropping systems (IC or IR) produced better yields after four years of continuous cropping compared with monocropping and rotational cropping with the potato/soybean rotational intercropping system clearly superior.关键词
马铃薯/大豆/连续套作/系统产量/耕层土壤肥力Key words
potato/soybean/continuous intercropping/system yields/topsoil fertility引用本文复制引用
陈光荣,王立明,杨如萍,董博,张国宏,杨桂芳..西北灌区薯/豆连续套作对系统产量及土壤肥力的影响[J].草业学报,2017,26(10):46-55,10.基金项目
国家自然基金(31660134),现代农业产业技术体系建设专项资金(CARS-04-CES17),甘肃省农业科学院青年基金(2015GAAS20)和兰州市农业科技专项(2015-3-37)资助. （31660134）
