漳河灌区农田地表排水中磷素流失特征分析

:为了揭示农田面源污染的机理及其成因，该文选取湖北省漳河灌区的典型试验田作为试验对象，在田间试验结果进行分析的基础上，研究了水稻和玉米2种作物在不同处理方式下农田排水磷素流失的影响因子及其规律。试验结果表明，降雨强度、作物类型、农业耕作管理方式（包括灌溉施肥方式等）是农田磷素流失的主要影响因素；另外，土壤物理化学特性和地形地势等也在一定程度上影响农田磷素的流失。

Characteristic analysis of phosphorus loss in surface drainage from cropland in Zhanghe irrigation district

In order to reveal the mechanisms and causes of agricultural non-point source pollution, the Zhanghe Irrigation District in Hubei Province was selected to conduct the study on the basis of analyses of field experiments in this paper. The influencing factors and patterns of phosphorus losses in the agricultural drainage water of paddy rice and corn fields were studied. The results showed that rainfall intensity, crop type and agricultural tillage management (including irrigation techniques and fertilizer application, etc) are the crucial factors influencing the loss of phosphorus from agricultural drainage. Besides, soil physical and chemical properties, topography and land slope also affect the losses of phosphorus from farmland to a certain extent.