大豆干物质积累与氮,磷,钾吸收与分配的研究

本文通过在高产条件下对大豆不同生育阶段的茎、叶、叶柄、英、籽粒及全植株（不包括含根）干物质积累及氮、磷、钾吸收与分配的研究表明，大豆干物质积累量在始花期至盛花期和结英期至鼓粒期出现两次高峰，分别占总积累量的２３．９１％和４７．３９％。不同生育阶段氮和磷的吸收与积累量最大值在结英至鼓粒期，分别占总量的４７．７４％和４４．００％。钾的积累量最大值在始花期至盛花期，占总积累的３４．６６％，氮和钾的累积速

STUDY ON ACCUMULATION OF DRY MATTER AND ABSORPTION AND DISTRIBUTION OF NITROGEN,PHOSPHOROUS AND POTASSIUM IN SOYBEAN

The dry matter accumulation and absorption and distrbution of Nitrogen, Phosphorous, potassium in stems, leaves, leaf stalks, pods,seeds and plant (except rood) of soybean were studied on different development stages under high yield condition. The results showed: the dry matter accumulation had two peaks which account for 23.91%,47.39% of total accumulation at the periods from flower-beginning to full-flower stage and from pod-setting to pod-filing. The absorption and accumulation of Nitrogen, Phosphorous were the highest at the period from pod-setting to pod-filling, account for 47.74% and 44.00% of total respectively. Accumulation of Potassume was the highest at the period of from flower-beginning to full-flower stage, accunting for 34.66% of total accumulation amount. Accumulation rates of Nitrogen and Potassium were two peaks which appeared at the stage from flower-beginning to full-flower and pod-setting to pod-filling.