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地表径流含有丰富的营养,虽然个别植物养分与农药一起对水藻和水生植物的生长有限制或抑制作用,但研究者们相信,磷是使地表径流变肥的重要元素。如果由于磷的存在而水生植物生长受到影响的话,那么磷就变成了一种污染物质。 管理协会研究了农田控制非点源污染的基本要求和原理,提供了一种可变的管理系统控制非点源污染,即CREAMS模型。有些研究人员发现径流中的可溶性磷,耕地施肥造成的潜在污染磷与流域土壤和河流泥沙的吸收缓冲能力之间有相关关系。一些研究者在径流中的全磷流失量与泥沙含量之间建立了正相关关系。他们还表明,当泥沙含量低时,可溶性磷含量可能较高,这表明在径流中可能还有其它的可溶磷存在,如植物及其残余物。在美国不同湿润地区的径流小区与采用水保耕作法以及普通耕作法的流域,这些关系有所发展。这些研究或再早些的研究是从1963年开始观测的。 由于该区气候湿热和Ultisols侵蚀,与其它地区的水保措施,包括耕作措施相比较有明显的不同.我们试图验证南部山麓地带耕地径流中磷的形式和数量,并从中找出它与土壤保持措施的相关关系。
Surface runoff is rich in nutrients and although individual plant nutrients and pesticides have limited or dampened the growth of algae and aquatic plants, researchers believe phosphorus is an important element of surface runoff. If the growth of aquatic plants is affected by the presence of phosphorus, phosphorus becomes a pollutant. The Institute of Management studied the basic requirements and principles of non-point source pollution control in farmland and provided a variable management system to control non-point source pollution, namely the CREAMS model. Some researchers found that there was a correlation between soluble phosphorus in runoff, potential pollution of phosphorus from arable land fertilization and absorption buffer capacity of riverine sediment and sediment. Some researchers have established a positive correlation between total phosphorus loss and sediment content in runoff. They also showed that the soluble phosphorus content may be higher when sediment content is low, suggesting that there may be other soluble phosphorus species present in runoff, such as plants and their residues. These relationships have been developed in runoff plots in different wetlands of the United States and watersheds that use conservation tillage and ordinary farming practices. These studies or earlier studies have been observed since 1963. Because of the climatic and thermal runoff in this area and the Ultisols erosion, there is a clear difference compared to the conservation measures in other areas, including tillage practices. We attempted to verify the form and amount of phosphorus in cultivated land runoff in the southern foothills and find out how it interacts with the soil Correlation of measures.