永顺县植烟土壤钙、镁、硫分布特征及其影响因素研究

发布时间：2018-03-10 04:01

本文选题：永顺县　切入点：植烟土壤　出处：《湖南农业大学》2015年硕士论文　论文类型：学位论文

【摘要】：永顺县是湖南省的主要植烟区之一。为明确永顺烟区植烟土壤中钙、镁、硫元素的含量状况,研究了永顺烟区植烟土壤的钙、镁、硫元素发布及其影响因素,以期为永顺烟区植烟土壤钙、镁、硫元素诊断和施肥提供参考。主要研究结论如下：1.永顺县植烟土壤交换性钙含量总体偏高。交换性钙含量平均1561.73 mg.kg~(-1)。交换性钙含量适宜的土样仅占22.45%,偏高的占53.06%；另外有23.81%的土壤存在着不同程度的缺钙,极度缺乏的样品出现在毛坝乡,交换性钙含量为193.90 mg.kg~(-1),需补充含钙的肥料。2.永顺县植烟土壤有效硫含量丰富。有效硫含量平均为50.88 mg.kg~(-1)。有效硫含量中等水平以上的土样占86.90%,含量缺乏的土样仅占10.34%；有效硫含量偏低的土壤主要为高坪乡和石堤乡,这些乡镇土壤建议适当施用含硫肥料。3.永顺县植烟土壤交换性镁含量适宜。交换性镁平均含量为178.26 mg.kg~(-1)。交换性镁含量达中等以上的土样占70.75%,缺乏的土样占29.25%,极缺乏的土样占4.76%。植烟土壤中交换性镁含量分布不平衡,空间变异较大。全县西南部和中部交换性镁含量丰富,北部和南部成缺乏和极缺乏状态。4.采用分组方法分析了土壤pH、土壤类型、有机质与钙、镁、硫元素含量的关系。交换性钙和交换性镁的含量都随着pH的升高而升高的趋势；石灰土的平均含钙量最高,水稻土的交换性钙含量仅次于石灰土；交换性钙、镁含量有随着有机质的升高含量升高的趋势,植烟土壤有效硫含量有随有机质的升高而降低的趋势。
[Abstract]:Yongshun County is one of the main tobacco planting areas in Hunan Province. In order to determine the content of calcium, magnesium and sulfur in tobacco planting soil of Yongshun tobacco region, the distribution of calcium, magnesium and sulfur in tobacco planting soil in Yongshun tobacco region and its influencing factors were studied. In order to plant tobacco in Yongshun tobacco area, calcium, magnesium, The main conclusions are as follows: 1. The content of exchangeable calcium in tobacco planting soil in Yongshun County is on the high side. The average content of exchangeable calcium is 1561.73 mg 路kg ~ (-1) 路kg ~ (-1) 路kg ~ (-1). 23.81% of the soils had different levels of calcium deficiency. Extremely lacking samples appeared in Maoba Township, The exchangeable calcium content was 193.90 mg 路kg ~ (-1) 路kg ~ (-1), which needed to be supplemented with calcium fertilizer .2.The available sulfur content of tobacco planting soil in Yongshun County was rich, the average available sulfur content was 50.88 mg 路kg ~ (-1) 路kg ~ (-1) C ~ (-1). The main soils with low effective sulfur content were Gaoping and Shidixiang. The soil of these villages and towns suggested appropriate application of sulfur-containing fertilizer .3.The content of exchangeable magnesium in tobacco planting soil of Yongshun County was suitable. The average content of exchangeable magnesium was 178.26 mg 路kg 路kg ~ (-1) 路kg ~ (-1). 70.75% of soil samples with medium and above exchangeable magnesium content were found to be lack of soil samples, and 29.25% of soil samples were scarce. The content of exchangeable magnesium in tobacco planting soil was not balanced. The content of exchangeable magnesium in the southwest and central part of the county is abundant, and the north and south of the county are deficient and extremely deficient. The soil pH, soil type, organic matter and calcium, magnesium are analyzed by grouping method. The content of exchangeable calcium and exchangeable magnesium increased with the increase of pH, the average calcium content of lime soil was the highest, and the exchangeable calcium content of paddy soil was second only to lime soil. The content of magnesium increased with the increase of organic matter, and the available sulfur content of tobacco planting soil decreased with the increase of organic matter.
【学位授予单位】：湖南农业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S572;S158.3

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