文山植烟土壤交换性钙镁分布特征及影响因素分析

发布时间：2018-05-04 04:12

本文选题：文山烟区 + 土壤　；参考：《烟草科技》2017年09期

【摘要】：为研究文山烟区土壤交换性钙、镁含量及其比值的空间分布情况和影响因素,利用GPS技术在文山烟区采集了276份土壤样品,测定了其交换性钙、镁含量,并应用地统计学和经典统计学研究其空间分布特征和影响因素。结果表明:(1)文山植烟土壤交换性钙、镁含量丰富,平均含量分别为2 389.15和213.95 mg·kg~(-1),但钙镁比失调较为严重,有17.10%的区域可能造成烟株生理性缺钙(钙镁比5);有54.64%的区域可能造成烟株生理性缺镁(钙镁比10)。空间特征分析表明交换性钙、镁及其比值分布特征明显。(2)典型相关性分析表明文山烟区土壤交换性钙、镁含量及其比值受海拔高度、土壤pH以及土壤全磷的影响显著。逐步回归分析表明土壤pH对三者的影响最大。(3)土壤交换性钙、镁含量及其比值均随土壤pH和土壤全磷含量的升高而升高,交换性钙含量随海拔的升高而下降。
[Abstract]:In order to study the spatial distribution of exchangeable calcium, magnesium and their ratios in Wenshan tobacco region, 276 soil samples were collected by GPS technique and their exchangeable calcium and magnesium contents were determined. Geostatistics and classical statistics were used to study its spatial distribution and influencing factors. The results showed that the exchangeable calcium and magnesium contents in the tobacco planting soil of Wenshan were rich, the average contents were 2 389.15 and 213.95 mg / kg ~ (-1) respectively, but the imbalance of Ca / mg / mg ratio was serious. 17.10% of the regions may cause physiological calcium deficiency (Ca / mg = 5) and 54.64% of the regions may cause physiological magnesium deficiency (Ca / mg = 10). Spatial characteristics analysis showed that exchangeable calcium, magnesium and their ratio distribution were obvious. The canonical correlation analysis showed that the content and ratio of exchangeable calcium and magnesium in Wenshan tobacco region were significantly affected by altitude, soil pH and total phosphorus. Stepwise regression analysis showed that soil pH had the greatest effect on the three factors.) the contents of exchangeable calcium, magnesium and their ratios increased with the increase of soil pH and total phosphorus content, and the exchangeable calcium content decreased with the increase of altitude.
【作者单位】：湖南农业大学烟草研究院;湖南农业大学生物科学技术学院;湖南农业大学东方科技学院;
【基金】：云南省烟草公司科技项目“文山烟叶特色风格定位研究及品牌导向型基地建设开发”(2011YN73)
【分类号】：S158;S572

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