辽西褐土施肥及养分循环再利用中长期试验Ⅳ.土壤肥力变化  

A long-term field trial on fertilization and on use of recycled nutrients in farming systems Ⅳ.Soil fertility changes.

作　　者：张璐[1] 沈善敏[1] 宇万太[1] 

机构地区：[1]中国科学院沈阳应用生态研究所,沈阳110016

出　　处：《应用生态学报》2002年第11期1413-1416,共4页Chinese Journal of Applied Ecology

基　　金：国家重点基础研究发展规划项目 (NKBRSF;G19990 1180 4 0 2 );中国科学院"九 .五"重点基金项目 (KZ95 2 JI 2 14 );中国科学院知识创新重大项目 (KZCX2 413 4) .

摘　　要：经 12年田间试验 ,各施肥处理耕层土壤的肥力变化表明 ,在保持农业系统养分循环再利用基础上 ,施用适量化肥以平衡土壤养分收支 ,不仅可实现作物高产 ,减少过剩养分进入环境 ,并可改善土壤肥力 ,表现为明显提高了耕层土壤的有机C、N浓度 .不过 ,在本例中欲保持较高的土壤有效P水平 ,恐需在平衡土壤P收支基础上适当增加P肥施用量 .The fertility changes of soil under different fertilization treatments of a twelve years field trial indicated that the application of compost recycled in a farming system with appropriate amount of fertilizer applied to balance the soil nutrient budget, could not only produce higher crop yields and less surplus of nutrients into environment, but also improved soil fertility with significant increase of soil organic carbon and nitrogen in cultivated layer. However, maintaine higher soil available phosphorus, it was not sufficient just to balance the budget of soil phosphorus, and more phosphorus fertilizer application was needed .

关 键 词：辽西 褐土 施肥 养分循环再利用 长期试验 土壤肥力变化 

分 类 号：S158[农业科学—土壤学]