夏大豆植株氮、磷、钾含量与水肥的关系

1986—1988年在本所防雨轨道网室内,用盆栽方法研究了夏大豆植株各部器官在各生育时期N、P_2O_5、K_2O含量与水肥用量之间的关系。结果表明:随着水肥用量增加,植株各器官在各个生育时期N、P_2O_5、K_2O含量(克)都增加。每次供水1.8公斤/株处理比0.9公斤/株处理绝对含量(克/株)增加1倍以上;施20克/株比10克/株复合肥处理N、P_2

Relationship between the Contents of N.P.K.and Water Supply and Fertilizer in Summer Soybean

The relationship between the contents of N, P_2O_5 and K_2O in organs of summer soybeanat different growth stages and water supply and complex fertilizer were studied potculture.The results showed that the contents of N, P_2O_5 and K_2O in organs of plants in-creased with the increase of water and complex fertilizer supply. The absolute contents(g/plant) of N, P_2O_5 and K_2O in summer soybean treated with 1.8kg water / plant weremore than double those treated with 0.9kg water. The absolute contents of N, P_2O_5 and K_2Oin summer soybean treated with 20kg plant complex fertilizer were 20%--78% higher thanthose treated with 10kg complex fertilizer. However, the absolute contents of N, P_2O_5 andK_2O decreased when summer soybean were supplied with too much water and complex ferti-lizer. A simulated model of the curve relationship between the contents of N, P_2O_5 and K_2Oin summer soybean and the supply of water and complex fertilizer was established with com-puter.