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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_2O_5、K_2O绝对含量增加20—78％。水肥过量绝对含量降低。经微机模拟,提出了植株N、P_2O_5、K_2O含量与水肥用量间的曲线关系模式。
From 1986 to 1988, the relationship between N, P_2O_5 and K_2O contents and the amount of water and fertilizer in different growth stages of summer soybean plants was studied by potted method in our rain-proof orbital net. The results showed that N, P_2O_5 and K_2O contents (g) increased with the increase of water and fertilizer dosage. The absolute content of N, P_2O_5 and K_2O increased 20-78 times with the treatment of 20 kg / plant than 10 g / plant compound fertilizer at 1.8 kg / plant and 0.9 kg / plant respectively %. The absolute amount of excess water and fertilizer decreased. Through computer simulation, the curve of plant N, P_2O_5, K_2O content and the relationship between water and fertilizer consumption patterns was proposed.