吉林西部不同种植年限水稻土酸缓冲性能研究

Studies on Acid Buffering Ability of Saline-Alkali Paddy Soil of Different Cultivation Years in Western Jilin Province

种植水稻是盐碱地区改良土壤的一种有效方式,而选取p H值较低的水稻苗床土已经成为盐碱地区亟待解决的一个主要问题。本文主要针对吉林省西部盐碱地区不同种植年限的水稻土进行理化性质、水溶性盐基离子和酸缓冲性能的测定,确定影响盐渍水稻土酸缓冲性的主要因素,寻找水稻育苗土可利用资源。结果表明:西部不同种植年限盐渍水稻土的酸缓冲容量表现为:种植60年(壤质黏土)<50年(壤质黏土)<35年(壤质黏土)<45年(壤质黏土)<20年(壤质黏土)<45年(黏土)<25年(黏土),酸缓冲性主要受土壤碳酸盐、土壤黏粒及土壤碱化度的影响,种植50年和60年水稻的壤质粘土酸缓冲性较弱,易于调酸,可以考虑作为苗床土的供选资源。

Rice cultivation was an effective way to improve the soil in saline areas. However, how to select the rice seedbed soil has become a major problem in saline areas. Focused on the different cultivation years of paddy soils, the acid buffering properties, water soluble inorganic salt ions and physical and chemical properties were analyzed to find the key factors for acid buffering properties. The results showed that the acid buffering capacities of saline paddy soil was 60 years of loamy clay 〈 50 years of loamy clay 〈 35 years of loamy clay 〈 45 years of loamy clay 〈 20 years of loamy clay 〈 45 years of clay 〈 25 years of clay. The content of CO3^2-, clay particles and ESP played the important roles in the soil acid buffering ability, and the acid buffering capacity of planting 50 years and 60 years of loamy clay were weaker than others, and their acidity were easy to regulate and control, which could be developed as seedbed soil.