Saline–Alkaline Characteristics during Desalination Process and Nitrogen Input Regulation in Reclaimed Tidal Flat Soils

Coastal salt-affected soils account for a large area all around the world. Soil salinity and pH are two important parameters affecting soil quality. Investigating correlation of electrical conductivity (EC) at different depths in saline was useful quickly assessing saline–alkaline characteristics. During natural desalination process field reclaimed lands, phenomena increase nitrogen accumulation may occur. A sampling experiment conducted slightly affected by newly heavily soil. series soil–water ratio extracts consisting 1:2.5, 1:5, 1:10, 1:20, 1:40 designed to measure EC simulating characteristics during process. Meanwhile, reasonable utilization naturally ameliorated which consists high content nitrogen, plastic mulching (PM) accompanied with (N) fertilizer addition maize cultivation plots designed. Results showed that significant and/or existed ratios extracts, had higher (1.06 g kg−1). The negatively correlated depth 0~100 cm coastal soil, indicated value alkalization its desalination. Furthermore, PM treatments no difference N bulk density water obtained similar grain yield, between 6.2 6.5 t ha−1. decreased harvest index largest treated plots. Our study beneficial rapidly monitoring sustainable resources. In addition, we should focus far more on improvement rational chemical obtaining benefits