%0 Journal Article
%T 仁和烟区土壤肥力状况时空变化综合评价<br>Comprehensive Evaluation of Soil Fertility and Spatial-Temporal Characteristics in Sichuan’s Renhe Tobacco-Growing Areas
%A 冯文龙
%A 杨鹏
%A 杨建春
%A 罗富国
%A 唐李丽
%A 彭成林
%A 袁家富
%A 徐祥玉
%J Hans Journal of Agricultural Sciences
%P 59-68
%@ 2164-5523
%D 2020
%I Hans Publishing
%R 10.12677/HJAS.2020.101009
%X <div style=\"text-align:justify;\">
	<span style=\"font-size:14px;\">协调的土壤养分状况和较高的土壤综合肥力是作物优质高产的保障。本文采用主成分分析和等间距聚类分析方法对攀枝花市仁和烟区植烟土壤养分和肥力状况进行综合评价。研究结果表明：1) 土壤pH值和碱解氮适中，有机质、水溶性氯偏低；速效磷、速效钾、交换性钙、交换性镁丰富；2011~2017年pH值稍有升高、有机质和水溶性氯稍有降低，速效磷、速效钾、交换性钙、交换性镁大幅度上升。2) 2015~2017年土壤肥力综合得分IFI值的变幅为0.19~0.82，变异系数较2009~2010年降低，IFI平均值为0.52，较2009~2010年提高；主要是中、低海拔IFI值提高，高海拔降低；不同海拔高度土壤的综合肥力指标值大小为中海拔 &gt; 高海拔 &gt; 低海拔。3) 两次普查显示土壤养分各个指标对肥力综合评价值贡献变异较大，说明连年化肥施用导致土壤养分不平衡加剧。<br />
Harmonious soil nutrient and highly comprehensive fertility are guaranteed of high quality and high yield of crops. In this paper, principal component analysis and equidistant cluster analysis were used to evaluate the status of soil nutrients and fertility. The results showed that: 1) The pH value and available nitrogen were suitable; organic matter and water-soluble chlorine were low; available phosphorus, available potassium, exchangeable calcium and exchangeable magnesium were rich. From 2011 to 2017, pH value was slightly increased, organic matter and water-soluble chlorine ware decreased gradually; available phosphorus, available potassium, exchangeable calcium and exchangeable magnesium increased significantly. 2) The IFI value of the whole soil samples range from 0.19 to 0.82 in 2017 year, with the average IFI value was 0.52, which was higher than that in 2010, but the coefficient of variation was lower than that in 2010. Comparing with 2010 year, IFI value of medium and low altitude in 2017 year was increased, while that of high altitude was decreased. The soil integrated fertility index of different altitudes was medium altitude &gt; high altitude &gt; low altitude. 3) Our results also showed that the contribution of various indexes of soil nutrients to the IFI value varied greatly, which indicated that the application of fertilizers in successive years led to the aggravation of soil nutrient imbalance.</span> 
</div>
%K 土壤肥力，时空演变，综合评价，主成分分析<br>Soil Fertility
%K Spatial-Temporal
%K Comprehensive Evaluation
%K Principal Component Analysis
%U http://www.hanspub.org/journal/PaperInformation.aspx?PaperID=33929