江西农业学报2011，Vol.23Issue(4)：86-90,5.
宁南山区苜蓿地土壤养分的变化规律
摘要
Abstract
In order to investigate the variation of soil nutrients in alfalfa fields in the semi - arid hilly loess region of south Ningxia, this study analyzed the soil nutrients of alfalfa fields at different sloping positions and with different planting years.The results showed that: ( 1 ) In the hilly loess region of south Ningxia, the soil nutrient content of alfalfa fields reduced along with the increase of soil depth.(2) Except available K, the contents of organic matter, total N, available N, total P and available P in 0 ～ 100 cm soil layer all obviously increased as the sloping position of alfalfa field lowered.The comprehensive fertility index of alfalfa fields at different sloping positions appeared the following order: down slope ＞ mid slope ＞ upsiope.(3) The soil fertility index of alfalfa fields with different planting years varied from 0.539 to 0.847, it was lower than that of the sloping lands, and increased first and then declined along with the increase of the planting years of alfalfa.关键词
土壤养分/苜蓿地/坡位/种植年限/土壤综合肥力指数分类
农业科技引用本文复制引用
潘占兵,李生宝,马璠,董立国,季波,王月玲,张源润..宁南山区苜蓿地土壤养分的变化规律[J].江西农业学报,2011,23(4):86-90,5.基金项目
国家自然科学基金(41061034) （41061034）
国家"十一五"科技支撑计划项目"半干旱黄土丘陵区退化生态系统恢复技术研究"(2006BAC01A07) （2006BAC01A07）
宁夏自然科学基金"宁夏退耕还林工程效益监测与定量评价研究"(NZ0969). （NZ0969）
