Experimental study on simulated rainfall of N and P loss from farmland in Huaibei Plain

doi:10.14088/j.cnki.issn0439-8114.2022.03.009

Abstract

Abstract: Huaibei Plain farmland was taken as the research object to investigate the correlation between infiltration water, soil flow TN, TP and soil type and soil depth of two types of soil （Shajiang black soil and Yellow tide soil） through artificial rainfall simulation test. Combined with field sampling survey, the nitrogen and phosphorus content index of regional water body was determined, and the characteristics of nitrogen and phosphorus nutrient loss in regional farmland were analyzed, and the transfer ratio was estimated. The results showed that the contents of TN and TP in soil flow were different with soil type, soil depth and rainfall duration; Nutrient loss in Yellow tide soil aquic soil was easier to migrate and lose than N, while that in Shajiang black soil was easier to migrate; Field sampling data showed that the basic way of nitrogen and phosphorus loss in Huaibei Plain was as follows： dry land/farmland→small ditch→big ditch/pond. The contents of TN and TP in big ditch water body were 80.01% and 83.23% of those in small ditch, respectively, which could be used as a reference for selecting the inflow coefficient of farmland non-point source in the main rivers of the region.

Key words: Huaibei Plain, rainfall simulation, farmland non-point source, nitrogen and phosphorus loss

CLC Number:

S146⁺.2

ZHANG Chun, ZHANG Hao-jie, WANG Lei. Experimental study on simulated rainfall of N and P loss from farmland in Huaibei Plain[J]. HUBEI AGRICULTURAL SCIENCES, 2022, 61(3): 42-46.

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