摘要
为探明温室土壤中钙素的形态分布特征及其迁移转化规律,以沈阳市郊栽培年限为15年左右的温室耕层和犁底层土壤为研究对象,系统研究了土壤中不同形态钙素的含量及其分布特征,并进一步分析了不同形态钙素与土壤pH值、有机质之间的相关性。研究结果表明:耕层土壤全钙含量呈现出温室>冷棚>耕地的规律性。温室土壤中交换性和酸溶性钙含量高于冷棚和耕地土壤,但钙素的有效性相对降低。温室耕层土壤中以非酸溶性钙含量为主,犁底层土壤中水溶性、交换性和酸溶性钙含量较多,钙在土壤中易向下迁移;温室耕层土壤中酸溶性钙与pH呈极显著的正相关,温室土壤pH的降低可促进酸溶性钙在土壤中的淋失。土壤全钙和非酸溶性钙与有机质之间呈显著和极显著的正相关,有机质含量主要影响土壤中钙素的积累。
This study was conducted to investigate the fractionations and the migration rules of calcium in greenhouse soils. The different configuration calcium content and distributing character in cultivation layer and plow pan in facility cultivation soils of Shenyang suburbs,Liaoning of China,which have been planted about 15 years,was investigated. The relativity between different configuration calcium content and pH.content of soil organic manure was analyzed further. The results showed that there was a certain regularity about the total content of calcium, green-house soils〉 plastic tunnel soils〉field soils. The content of exchangeable calcium and acid soluble calcium in the green-house soils was more than that in plastic tunnel soils and field soils. But calcium availability decreased relatively. The Non-acid soluble calcium content of soil in cultivation layer was more than that in plow pan. Water soluble calcium, exchangeable and acid soluble calcium content were opposite. Calcium moved down easily in soil. Significant correlations were found between acid soluble calcium content and pH value, total calcium content and content of organic manure,non-acid soluble calcium content and content of organic manure in cultivation layer soil of greenhouse. The decreasing of pH value in greenhouse soils could accelerate acid soluble calcium to run off. Organic manure affected the accumulation chiefly.
出处
《水土保持学报》
CSCD
北大核心
2009年第4期200-203,212,共5页
Journal of Soil and Water Conservation
基金
国家科技支撑计划项目(2006BAD07B04)
关键词
沈阳市郊
温室土壤
钙素特征
Shenyang suburbs
greenhouse soils
the feature of calcium
