旱作豌豆磷肥效应研究

The Effect of Phosphoric Fertilizer on Growth and Root Distribution of Bea 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部生长、根系分布和产量的影响．结果表明，施用磷肥显著促进豌豆地上部生长，增长根量，扩大根系范围，增加单株荚数、粒重、提高产量．不施磷与施磷肥下，豌豆株高、主茎节数的地上干物重随生育期的变化均可用Ｌｏｇｉｓｔｉｃ方程描述，而一定土体内单株根长随上层深度和生育期的变化可用非齐次的二元多项式模拟．在本试验条件下，豌豆磷肥的经济最佳施用量为每亩６７．４ｋｇ过磷酸钙．

The study on the effect of phosphoric fertilizer on the growth,root distribuhon and yield of dryfarming pea was conducted under field condition.ResultS showed that phosphoric fertilizer applied promoted the growth above ground,increased the root amount,expended the root distribution range, raised the number of pod and grain weight per plant and increaded the yield.The variation of the plant height,number of stem node and dry weight above ground with growing time were simulated by logistic Equation. and the changement of the root length in a definite soil body with soil depth and growing time were imitated by a binary power function. Under the experimental condition the most economical amount or phosphoric fertilizer was 1011.0kg, superphosphate per ha.