干旱地区农业研究2013，Vol.31Issue(1)：127-132,6.
民勤湖区表层土壤养分的空间异质性
Spatial heterogeneity of surface soil nutrients in Minqin lake area
摘要
Abstract
By using the methods of geostatistics, the spatial heterogeneity of available N, available P and available K in surface soils in Minqin lake area was studied. The results indicated that soil N and K were rich but soil P was poor over the three landscapes of oasis, desert and transitional belt. The variation coefficient of soil available N and P was the smallest in oasis area and the biggest in desert area, while that of soil available K was the smallest in desert area and the biggest in oasis-desert transitional belt. Soil nutrients in the study area wholly exhibited moderate spatial variability. The soil available N and P presented a U-shaped distribution pattern, and the soil available K presented an inverse U-shaped distribution pattern from oasis to desert. Available N, P and K fitted well to Exponential model, PentaspHerical model and Tetrasherical model, respectively. The enriched zone of available N and P was located in oasis area, whereas that of available K was located in oasis - desert transitional belt. The soil nutrient contents were related not only to the elements of parent rocks, but also to the impact of human activities.关键词
表层土壤/养分/空间异质性/地统计学/民勤湖区Key words
surface soil/ nutrient/ spatial heterogeneity/ geostatistics/ Minqin lake area分类
农业科技引用本文复制引用
张凯,冯起,吕永清,张勃,司建华,王润元..民勤湖区表层土壤养分的空间异质性[J].干旱地区农业研究,2013,31(1):127-132,6.基金项目
甘肃省自然科学基金项目(3ZS061-A25-009) （3ZS061-A25-009）
国家公益性行业(气象)科研专项(GYHY200806021,GYHY201106029) （气象）
干旱气象科学研究基金项目(LAM201206) （LAM201206）
甘肃省气象局第二批"青年优秀人才"基金 （）
