Effects of Irrigation and Nitrogen Fertilizer on Soil Carbon Leaching in Cotton Fields in Arid Areas

In order to formulate a reasonable water input model for cotton fields in southern Xinjiang scientific and rational fertilization, reduce soil carbon leaching, improve sequestration capacity, an undisturbed column leaching test was used simulate the current field management method study area. Two methods, drip irrigation flood irrigation, were set up, three nitrogen fertilizer levels carry out test. The results showed that amount mode of affected distribution loss organic inorganic soil. When application rate increased from 270 kg·hm−2 450 kg·hm−2, soluble significantly. 6000 m3·hm−2 9000 m3·hm−2, DOC DIC under higher than irrigation. rates fastest conditions high (9000 m3·hm−2) (450 kg·hm−2). This shows methods are important factors affecting leaching. case excessive input, long-term high-frequency is main factor