摘要
利用"网格"取样、土壤养分状况系统研究法和GIS技术探讨了湖北省粮食主产区3个自然村土壤养分的空间变异特性。结果表明,pH值和有机质相对稳定,在整个研究区域其变异较小,近似于正态分布,施肥元素的变异则较大,表现出明显的负偏峰分布特征;土壤有效P、K和Zn等重要施肥元素的空间变异主要是受土壤利用方式和施肥水平等随机因素的影响,同时其缺乏又更多地出现在水田中。
Soil nutrients spatial variability in 3 natural villages from different grain crop regions of Hubei were studied by using grid sampling, ASI method and GIS techniques. Results showed that： （1） Soil pH values and organic matter content were relatively stable soil properties. In the area studied their spatial variability was rather small and showed almost normal distribution. As the fertilization soil elements, their spatial variability was quite great and showed obviously negative distribu- tion. （2）The spatial variability of the fertilization elements （soil available P, K and Zn） was mainly influenced by random factors, such as crop type and fertilization levels. Paddy soils were more easily deficient in available P, K and Zn.
出处
《湖北农业科学》
北大核心
2007年第6期904-907,共4页
Hubei Agricultural Sciences
基金
国家科技攻关项目"粮食主产区地力培育与农田污染防治技术研究"(2004BA520A13)
北美/加拿大钾磷肥研究所(PPI/PPIC)NMS项目(Hubei199901)
关键词
土壤养分
一般变异特性
空间分布特征
soil nutrients
general variability
spatial distribution characteristics
