中国玉米主产区土壤养分的空间变异及影响因素分析

赵晴月,许世杰,张务帅,张哲,姚智,陈新平,邹春琴

Spatial Regional Variability and Influential Factors of Soil Fertilities in the Major Regions of Maize Production of China

ZHAO QingYue,XU ShiJie,ZHANG WuShuai,ZHANG Zhe,YAO Zhi,CHEN XinPing,ZOU ChunQin

表1 全国玉米主产区土壤养分含量描述性统计

Table 1 Overall statistical characteristic of measured soil fertilities in the major regions of maize production in China

土壤养分 Soil fertility 样品数 Sample size 分布类型 Distribution types 中值 Median 5%—95%置信区间 5%-95% confidence interval 均值 Mean 标准差 Standard derivation 变异系数 Variance coefficient (%) 偏度 Skewness 峰度 Kurtosis pH 980 对数正态 Lognormal 6.9 5.1—7.9 6.8 0.9 12.7 -0.70 -0.11 有机质 Organic matter (g·kg-1) 980 对数正态 Lognormal 21.0 10.7—48.6 23.9 11.6 48.5 1.62 3.26 全氮 Total N (g·kg-1) 980 对数正态 Lognormal 1.5 0.7—3.5 1.7 0.9 50.0 1.48 2.70 有效磷 Olsen-P (mg·kg-1) 980 偏态 Skewed 22.4 4.6—84.2 30.5 25.5 83.6 1.66 2.90 速效钾 Available K (mg·kg-1) 980 偏态 Skewed 164.5 66.0—358.9 183.8 95.5 52.0 1.55 5.59