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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 is an effective way to improve soil in saline-alkali region. Selecting paddy soil with low p H value has become a major problem to be solved urgently in saline-alkali region. In this paper, the physicochemical properties, water-soluble base ions and acid buffer properties of paddy soils with different planting years in the saline-alkali region of western Jilin Province were determined. The main factors influencing the acid buffering capacity of saline paddy soils were determined and the available resources . The results showed that the acid buffering capacity of saline paddy soils with different planting years in western China was as follows: 60 years of planting (loamy clay) <50 years (loamy clay) <35 years (loamy clay) <45 years (loamy clay) <20 years (loamy clay) <45 years (clay) <25 years (clay), acid-buffering is mainly affected by soil carbonate, soil clay and soil alkalinity, planting 50 years and 60 years of rice Acid clay loam buffer is weak, easy to adjust acid, can be considered as an alternative source for seedbed soil.