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河南省土壤生产力评价

发表时间:2012-12-31  浏览量:1636  下载量:435
全部作者: 王文琴,王媛
作者单位: 天津大学环境科学与工程学院
摘 要: 在介绍土壤生产力指数(soil productivity index, PI)模型与表土评价法(surface soil productivity index, CI)模型机理和模型结构的基础上,以国家粮食战略工程河南核心区为研究区,利用研究区14个市各县的土壤理化性质数据、气候状况和作物产量调查数据,比较分析根据研究区土壤特性和数据可获得性订正过的PI模型(modified PI, MPI)和订正过的CI模型(modified CI, MCI)对土壤生产力的评价效果。结果表明:1) MPI模型的差异性较小,不易将土壤生产力水平进行分异;MCI模型的差异性较大,容易将土壤生产力水平进行分异。2) 2种模型生产力指数与正常年景小麦的线性回归结果比较,MCI模型较好(R2=0.784 1),MPI模型较差(R2=0.426 1)。3) 以MCI模型为标准,把河南省粮食核心区的土地土壤生产力划分成低、中、高三级。总体而言,MCI模型比MPI模型更适合河南省粮食核心区的土壤生产力评价。
关 键 词: 土壤环境学;土壤生产力;评价模型;河南省
Title: Research on the soil productivity in Henan province
Author: WANG Wenqin, WANG Yuan
Organization: School of Environmental Science and Engineering, Tianjin University
Abstract: Based on the systematic introduction of soil productivity index (PI) and surface soil productivity index (CI), this paper took the national grain strategy project of Henan province as study area and chose the data of 14 cities’soil profiles, weather conditions and crop yield. According to the soil properties and data availability, we compared the analysis results on modified PI (MPI) model and modified CI (MCI) model. The results showed that: 1) The discrepancy of calculated index on MCI model was more obvious than MPI model, so MCI model was better for distinguishing soil productivity between different soils. 2) Correlation between productivity index and crop yield in common years were analyzed, MCI model had the higher determination coefficient with R2= 0.784 1, followed by MPI model with R2=0.426 1. 3) Took MCI model as the standard, soil productivity of the land in Henan province could be divided into three levels: low, middle and high. Taken together, compared with MPI model, the MCI model is more suitable for the area grain soil productivity evaluation of Henan province.
Key words: soil enviornmental science; soil productivity; assessment model; Henan province
发表期数: 2012年12月第24期
引用格式: 王文琴,王媛. 河南省土壤生产力评价[J]. 中国科技论文在线精品论文,2012,5(24):2323-2332.
 
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