【摘要】 以(1 5NH4)2SO4 作为标记氮肥,设三个氮肥量,对大豆植株地上部的氮肥吸收率加以研究,结果表明,高氮肥能促进大豆植株对化肥氮的吸收,在低氮处理下,子粒对化肥氮的吸收率更高;大豆各部位间相比,叶片对氮肥吸收率最高,茎、荚果次之,叶片、茎的氮肥吸收率随大豆生长发育而逐渐降低,荚果则呈现高-低-高的变化。更多还原

【Abstract】 The nitrogen absorption rate of soybean was studied with (15NH 4) 2SO 4 as the mark nitrogen.The result showed that the high nitrogen could promote soybean to absorb it; while the low nitrogen could promote soybean to sbsorb it obviously; there was the highest nitrogen absorption rate in leaf and higher in stem and legume;the nitrogen absorption rate in leaf and stem reduced gradually with soybean growing, but in legume the rate changed as high-low-high.更多还原