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海河流域是我国农业发展的一个重要基地,由于不合理开发利用,造成某些地区土壤出现贫瘠化、盐渍化和沙漠化,土壤缺磷也很明显.为了寻找植物对磷的需求特点以及海河流域土壤磷分布规律,可以从植物指示的角度研究不同地区不同植物磷含量特征及其差异,研究植物每年从土壤中输出和输入的磷总量,从而寻找农业生态系统磷循环规律并科学指导施肥.
The Haihe River Basin is an important base for agricultural development in our country. Due to the unreasonable exploitation and utilization, the soil in some areas is impoverished, salinized and desertified, and the phosphorus deficiency in the soil is also obvious. In order to find out the demand characteristics of plants for phosphorus and the Haihe River Basin The distribution of soil phosphorus can study the characteristics and differences of phosphorus content of different plants in different regions from the perspective of plant indications. The total amount of phosphorus output and input by plants from soil can be studied in order to find the phosphorus cycling rules of agricultural ecosystem and to guide the fertilization by science.