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农田中的正磷酸盐一部分被植物、细菌利用,一部分伴随径流进入水体进而对水体造成污染。研究灌溉区农田到河岸带中正磷酸盐的迁移规律与迁移特征。选取成都双流县黄龙溪灌区农田,伴随可用于灌溉的河道设施,测定农田到河岸带河岸过渡带区域不同地点土壤中正磷酸盐的含量。结果表明农田区域正磷酸盐含量缓慢降低,农田区与河岸过渡带交界处出现陡降,在河岸过渡带区域又呈先上升后下降的趋势。该成果可为灌渠水体污染防治问题提供支持。
Part of the orthophosphate in farmland is utilized by plants and bacteria, and some of it is accompanied by runoff and enters the water body, causing pollution to the water body. To study the migration and migration of mesophosphate from farmland to riparian zone in irrigated area. The farmland of Huanglongxi Irrigation District in Shuangliu County of Chengdu was selected, and along with the river facilities available for irrigation, the content of orthophosphate in the soil at different locations along the riparian zone from farmland to riparian zone was measured. The results showed that the content of orthophosphate in farmland decreased slowly, and the junction of farmland and bank was declining sharply, and the area in the bank increased first and then decreased. This result can provide support for the prevention and control of irrigation canal water pollution.