冀西北坝上高原区豆科作物培肥效应研究

目的]研究6种豆科作物的培肥效应,为实现冀西北坝上高原区资源与抗逆性豆科固氮作物优化配置提供科学依据。方法]采用微区定位试验,测定作物产量和土壤氮素含量。结果]结果表明:连续3年苜蓿的产量都高于其他5种豆科作物,达到3900~5400kg/hm2,土壤氮素含量除第1年略低于对照外,后2年均高于对照;第1年蚕豆产量与土壤氮素含量都最低,但第2、3年的产量仅低于苜蓿,土壤氮素含量也高于对照;第1年大豆种植产量为2700~3050 kg/hm2,重茬明显减产,但土壤氮素含量都高于对照;豌豆3年的产量都较低,土壤氮素含量第1年低于对照,后2年高于对照,且第3年高于其他5种豆科作物;红芸豆和一粒传的产量较高,但土壤氮素含量较低。结论]综合产量和土壤氮素含量得出,苜蓿是该地区相对适宜种植的豆科作物。

Research on the Effects of Legume Fertility Betterment on the Bashang Plateau

Objective] The research aimed to study the effects of legume fertility betterment on the northwest of Bashang plateau,and provide references for optimal allocation of achieving resources and resistance nitrogen-fixing legume crops.Method] The output and the soil nitrogen content of 6 kinds of legume crops were determined through micro-experiment.Result] The results showed that the output of alfalfa was 3 900-5 400 kg/hm2 for 3 consecutive years,which was higher than the other 5 legume crops.In the 1st year,the soil nitrogen content was slightly lower than control,but in the 2nd and 3rd years,the soil nitrogen content was higher than control.In the 1st year,broad bean output and soil nitrogen levels were the lowest,while in the following 2 years,the output of broad bean was lower only than alfalfa,and the soil nitrogen content was higher than control.In the 1st year,soybean output was 2 700-3 050 kg/hm2,the output of continuous cropping was underproduction,while the soil nitrogen content was also higher than control.In these 3 years,the output of pea was relatively low,and in the 1st year the soil nitrogen content was lower than control,while in the following two years higher than control,in the 3rd year,the soil nitrogen content was higher than the other 5 legume crops.Tthe output of red kidney beans and the one grain hereditary kidney bean were higher,but the soil nitrogen content was relatively lower.Conclusion] By integrating production and soil nitrogen content,alfalfa is the relatively suitable cultivation of leguminous crop on the northwest of Bashang plateau.