种植方式对大豆植株干物质积累及养分吸收影响的研究

不同种植方式对大豆植株干物质积累量，干物质积累速度、各器官光合产物的分配及对氮、磷、钾营养元素的吸收均有不同程度的影响。窄行穴播种植法在结英至鼓粒期单株干物质日积累最多１．４５ｇ，较窄行条播、垄上双条播、垄上穴播种植法分别增加０．０１ｇ、０．０２ｇ、０．０６ｇ；光合产物分配率也最高为２６．１％，较窄行条播、垄上双条播、垄上穴播分别高４．２％、４．９％、３．２％。同时养分积累也最多，氮、磷、钾在叶片

THE EFFECT OF PLANTING PATTERN ON DRY MATTER ACCUMULATION AND NUTRIENT CONTENT ABSORBABILITY OF SOYBEAN PLANT

There were different effect of different planting pattern on dry matter content,speed ofdry matter aaccumulation, photosynthate apportion rate of various organ,and absorbabilityof nitrogen, phosphorus. Potassium of soybean plant. The dry matter accumulation of sowingin narrow hill drop was 1. 15g/plant. day at podding to seed filling stage,which was 0. 01g,0. 02g,0.06g higher than those sowing in narrow drill,sowing two rows on ridge,sowinghole on ridge respectively. The photosynthate apportion rate at this stage was 26.1%,whichwas 4.2%,4.9%,3.2% higher than those sowing in narrow drill, sowing two sows onridge,and sowing hill drop on ridge. Simultaneously, nutrient content accumulation washigher at this stage.The content of nitrogen,phosphorus,potassium was also higher in leaf,stem,leaf stalk,pod and seed.Therefore we must meet the needs of plant nutrient absorbability at this stage to improve soybean yeild.