CAJ | 학술논문

采用单因素随机区组设计，研究了薯豆套作模式下大豆不同种植密度对作物产量的影响。结果表明，套作大豆产量与密度变化的关系可以用二次抛物线回归方程表达，并随大豆密度的增加，株高、主茎节数、底荚高度趋于升高，而有效分枝数、单株荚数、单株粒数和单株粒重趋于下降，荚粒数、百粒重变化不大，相对稳定。密度对套作马铃薯株高及单株结薯数影响不大，而商品薯率随密度增加而降低。大豆密度为15万株/hm2时，大豆、马铃薯产量均最高，分别是2136.03、42462.5 kg/hm2。
채용단인소수궤구조설계，연구료서두투작모식하대두불동충식밀도대작물산량적영향。결과표명，투작대두산량여밀도변화적관계가이용이차포물선회귀방정표체，병수대두밀도적증가，주고、주경절수、저협고도추우승고，이유효분지수、단주협수、단주립수화단주립중추우하강，협립수、백립중변화불대，상대은정。밀도대투작마령서주고급단주결서수영향불대，이상품서솔수밀도증가이강저。대두밀도위15만주/hm2시，대두、마령서산량균최고，분별시2136.03、42462.5 kg/hm2。
In this study,single radom-plot design was conducted to study the effect of different densities on yield in early potato intercropping soybean in Gansu irrigation districts along Yellow River . The results indicated that the yield of relaying soybean changed with plant density,which could be expressed by using a parabola regression equation . With the increase of plant density, plant height,the number of the main stalk,the height of lowest pods increased,but the effective branching,pod number per plant, seed number per plant,grain weight per plant reduced,and seed number per pod,100-grain weight almost kept stable . And the yield of relaying soybean and early potato was the highest with the optimum density of about 150 000 plants/hm2,which are 2 136.03 kg/hm2 and 42 462.5 kg/hm2,respectively.