施用磷肥对旱作豌豆生长和氮、磷、钾吸收的影响

The Effect of Phosphoric Fertilizer on the Growth and N,P,K Uptake of Pea under under Rainfed Condition

本文利用田间分期取样。研究了旱作条件下施用磷肥对豌豆地上和根系干物质消长规律及氮、磷、钾吸收的影响．结果表明，施磷能显著提高豌豆根系和地上的干物质重量．磷浓度以及氮、磷、钾单株吸收量．通过对平均吸收速度分析，可以认为，施磷后．氮、钾吸收量的提高，主要是因为根系量增多，吸收面积加大的缘故，而磷吸收量的提高则应是磷吸收速度加快和根系量增多、吸收面积加大共同所致．

The efTect of phosphoric feritilizer on the growth and N,P,K apsorption of dryland pea was studied under field condition.The dry weight of root and above-ground,P concentrition and amount of N,P,K per plant were increased by phosphate applicahon.By analyzing the mean uptake rate of N,P and K,it was was considered that the raise of amount of N and K per Plant was result from the increase of root amount and the area of uptake,and that the reason of the raise of P amount perplant was that both root amount and the mean uptake rate were increased.