Effects of Paddy Field Construction on Nutrient and Carbon Sequestration in Different Types of Soil
SUN Xubo
DU Yichun
SUN Yingying
CAO Tingting
LIU Hongying
ZHANG Hongkai
Abstract：In order to evaluate the effect of land use change on soil nutrient and carbon sequestration,three typical soil types of lou soil,alluvial soil and loessial soil surrounding the Great Xi'an River were studied to analyze the effects of paddy field construction on the nutrient contents and carbon retention of different soil types.The results showed that the grain compositions of the three soils did not change much after the paddy field was constructed.In the 0-60 cm soil layer,compared with before paddy field,the contents of available phosphorus in the alluvial soil and the loessial soil decreased significantly by 41.2％ and 46.5％,available potassium contents decreased by 22.8％ and 16.9％,respectively;available phosphorus and available potassium contents in the lou soil increased significantly by 70.3％ and 32.4％,respectively;the contents of total nitrogen and total organic carbon in the three soils decreased by 17.1％-32.9％ and 16.1％-39.3％ respectively,and total carbon contents of the alluvial soil and the loessial soil decreased significantly by 7.6％ and 28.6％,while that of the lou soil increased by 13.9％,which indicated that the carbon retention capacity of the lou soil was improved after the construction of paddy field.In conclusion,either dry land or unutilized land for paddy field construction on the lou soil was more conducive to the improvement of soil nutrient and carbon sequestration.
Keywords：Soil typeConstruction of paddy fieldsNutrient changeCarbon fixation
Publication Date：2018-04-02
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：6( 54-58,63 )