福建主要粮油作物测土配方施肥指标体系研究Ⅳ.土壤速效氮磷钾测定值与最佳施肥量的关系

Soil testing and fertilization indices for major grain and oil crops in Fujian Ⅳ.Correlation between soil test data and fertilization model

摘要: 根据近年来在水稻、甘薯、马铃薯和花生上完成的众多氮磷钾肥效试验结果建立肥效模型,计算各试验点的相应氮磷钾推荐施肥量;对采集的基础土样测定土壤碱解氮、Olsen-P和速效钾含量;然后在氮、磷、钾推荐施肥量与相应土测值之间建立起回归关系式.结果表明,这种关系式满足指数回归模型,各回归方程均达到统计显著水平.建立的关系式使得本来只有相对意义的土壤速效养分测定值转变为直接用于确定施肥量的参数.因此,该关系式的建立使肥料效应函数法同时起到了宏观调控和微观指导的全面功能.

Abstract: Based on a large number of field fertilization experiments on rice,sweet potatoes,potatoes and peanuts,fertilization models were established.Soil tests for alkali-hydrolyzable nitrogen,Olsen-P and available K were conducted for data to perform a regression analysis against these models.The results showed a correlation in an exponential function with F values reaching significant level.Thus,the established models were considered applicable in practice.