摘要
70年代以来,国内外对大豆养分吸收动态和大豆的需肥量已进行过不少的研究.如Hanway等(1971)测定了大豆一生中氮、磷、钾的积累动态,确定了大约40%的氮、45%的磷和40%的钾是在豆粒开始形成之后积累的.Harper(1971)的研究证明,开花早期氮、磷、钾的积累速率急剧增加。
The studies were carried out with early variety (Hongfeng3)and late varieties(Liaodou3,Kaiyu8)in1984, 1986 and 1987.The results showed that the concentrations of N, P(P_2O_5)and K(K_2O) are decreasing in nutritive organs, but, increasing in developmental seeds.
The total accumulations of N, P, K in soybeans can be expressed by Logistic curve equations. It is about 1 to 2 weeks earlier to appear the maxium absorption rate of K than those of N and P. The amount of N,P and K which were uptaked from soil for producing 100kg soybean seeds are changeable, in our studies, N 9.45kg,P 1.95, K 2.96 for Liaodou3, but, for Hongfeng3, N 8.25kg, P 1.89kg, K 2.01kg.
出处
《辽宁农业科学》
北大核心
1989年第4期6-11,共6页
Liaoning Agricultural Sciences
基金
该项研究得到辽宁省科委的资助
