APPLICATION OF ZEOLITE IN IMPROVEMENT OF SALINE-ALKALI SOIL IN NORTHEAST CHINA
CHEN Jiang1,2, CHEN Xiao-yan3, DAI Hui-min1,2, LIU Guo-dong1,2, LIU Kai1,2, FANG Na-na1,2, MAO Zhao-xia1
1. Shenyang Center of China Geological Survey, Shenyang 110034, China; 2. Key Laboratory of Black Land Evolution and Ecological Effects, CGS, Shenyang 110034, China; 3. Jilin University, Changchun 130026, China
Abstract:The salinization of black land in Northeast China, especially Songnen Plain, is accelerating, greatly challenging the food security in black land. Therefore, the improvement of saline-alkali soil becomes important. The main influencing factors include semi-arid climate, geological conditions, low-lying terrain and groundwater level. The soda saline-alkali lands are well developed in Songnen Plain, with Na+ as the major positive ion, CO32- and HCO3- negative ions in soil salt, characterized by high alkalization. As both the exchanger and adsorbent of ions, zeolite can absorb Na+ and SO42- in saline-alkali soil, reducing soil pH and alkalinity. Moreover, it can increase the capacity of soil to retain NH4+, PO43- and K+, and improve nutrient availability, which is significantly effective in soil improvement. However, due to the uncertainty of zeolite modification, dosage and aging, the future study should pay more attention to the soil improvement in saline-alkali land by zeolite according to local conditions and strengthen the research on zeolite modification and regeneration, so that zeolite can play a greater role in desalination and alkali reduction.
陈江, 陈霄燕, 戴慧敏, 刘国栋, 刘凯, 房娜娜, 毛朝霞. 沸石矿物在东北地区黑土地盐碱化土壤改良中的应用[J]. 地质与资源, 2020, 29(6): 621-626.
CHEN Jiang, CHEN Xiao-yan, DAI Hui-min, LIU Guo-dong, LIU Kai, FANG Na-na, MAO Zhao-xia. APPLICATION OF ZEOLITE IN IMPROVEMENT OF SALINE-ALKALI SOIL IN NORTHEAST CHINA. GEOLOGY AND RESOURCES, 2020, 29(6): 621-626.
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