松嫩平原黑土区施肥与土壤有效磷累积关系的研究

以农业生态系统思想为指导,采用以组合设计为理论基础的旋转设计,建立了松嫩平原黑土区土壤有效磷以农肥、化肥和秸秆为实验因子的数学模型。采用模型解析的方法,借助于计算机分析、图示等先进手段,研究了农肥、化肥和秸秆与有效磷累积的关系,全面分析了试验因子与有效磷累积关系的规律,并定量地给出了有效磷维持在一定水平的调控途径。

Study on Relationship Between Fertilizer Application and Available Phosphorus Accumulation of Soils in Black Earth Zone of Songnen Plain

Based on the theory of agricultural ecosystem and by using the rotation design method which takes the combination design as its theoretical basis,the mathematical model on available P of soils in the black earth zone of the Songnen Plain as a function of applied farmyard manure,fertilizer and straw were used to study the relationship between the available P accumulation in soils and the application of farmyard manure,fertilizer and straw,And it is analyzed in an all-round way the dynamics of the accumulation of available P in relation to these factors,particularly to single factor and to double factors,and then the way to regulate and control the available P in soils at certain level is given.