摘要
本文分析了黔东地区的水稻土,对土壤各理化因素和肥力分级之间的关系,进行了相关、回归、以及主成分分析等大量的数理统计,筛选出3个因素作为分析的间接指标,并证明提出的肥力分级指标的可测性,其方法简便;此外,还从不同角度来阐明肥力分级数量化方案的实用性。
The modernization of agricultural production and the scientifical and technological interchange require the gradation of soil fertility in quantification, which is also a domestic and overseas trend of the development of soil fertility science.According to the definition of soil fertility, the gradation is suggested by use of the biomqss of the plants growing on the natural soil but for agricultural soil the annual crop yield (ton / ha) is used in gradation.In this paper the paddy field of the eastern Guizhou is investigated. The relationship between the soil physical and chemical factors and chemical factors and its fertility gradation is analysed by statistical method of the correlation and regression and principal component anqlysis. Three factors are sieved out as the indirect indices of gradation, the indexes are proved to be mesurable and the method os simple and easy.In addition, the practical value of the fertility gradation plan in accordance with quantification is expounded from various angles. At last, the applicability of this means is also tuched.
关键词
数量化分级
土壤肥力
理化性质
soil
quantification
soil fertility gradation
paddy soil
eastern Guizhou
