Abstract
In order to study the relationship between different soil cover thickness and soil organic matter and total nitrogen in floodplain after land consolidation, spatial distribution characteristics of six soil cover thicknesses and soil carbon and nitrogen in the field plot experiment from 2015 to 2017. The results showed that soil organic matter and total nitrogen content decreased with soil depth under different thickness of soil cover, soil depth had a negative correlation with soil organic matter and total nitrogen content, and soil nutrient had apparent surface aggregation. When soil thickness was 50-60cm (C50, C60), soil organic matter and total nitrogen content were the highest among all soil depths, indicating that soil organic matter is one of the key ecological factors affecting soil total nitrogen. Therefore, for land reclamation of floodplain, the soil thickness of 50-60cm is the best, with good fertilizer-holding effect.
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