Effect of irrigation water quality on soil chemical characteristics and on crop growth was studied in this work. The salt content and sodium adsorption ratio (SAR) of irrigation water were considered to be two main indexes which were combined in the 16 treatments of irrigation water quality in the experiment. Results showed that salts of irrigation water were accumulated and leached alternately in the soil. When salt content of irrigation water was below 3.0g/L, the salt was kept balanced in soil profile. When the salt content of irrigation water was more than 3.0g/L, the salt was accumulated in the soil, even resulting in the medium secondary salinization. High SAR and high Na2CO3 in irrigation water can cause Ca2+ and Mg2+ to form sediment of CaCO3 and MgCO3 to decrease Ca2+ and Mg2+ concentration and to increase Na+ concentration in the soil solution. Thus SSP, SDR and SAR were risen. As a result ESP increased in the soil. When the SAR of irrigation water was more than 14, and the salt content was more than 3.0g/L or 4.0g/L, the growth and yield of soybean and wheat were influenced, a medium or strong soil secondary alkalization occurred.
肖振华,万洪富,郑莲芬.灌溉水质对土壤化学特征和作物生长的影响[J].土壤学报,1997,34(3):272-285. DOI:10.11766/trxb199601280306 Xiao Zhenhua, Wan Hongfu, Zheng Lianfen. EFFECT OF IRRIGATION WATER QUALITY ON SOIL CHEMICAL CHARACTERISTICS AND CROP GROWTH[J]. Acta Pedologica Sinica,1997,34(3):272-285.复制