本文選題：永順縣　切入點(diǎn)：植煙土壤　出處：《湖南農(nóng)業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：永順縣是湖南省的主要植煙區(qū)之一。為明確永順煙區(qū)植煙土壤中鈣、鎂、硫元素的含量狀況,研究了永順煙區(qū)植煙土壤的鈣、鎂、硫元素發(fā)布及其影響因素,以期為永順煙區(qū)植煙土壤鈣、鎂、硫元素診斷和施肥提供參考。主要研究結(jié)論如下：1.永順縣植煙土壤交換性鈣含量總體偏高。交換性鈣含量平均1561.73 mg.kg~(-1)。交換性鈣含量適宜的土樣僅占22.45%,偏高的占53.06%；另外有23.81%的土壤存在著不同程度的缺鈣,極度缺乏的樣品出現(xiàn)在毛壩鄉(xiāng),交換性鈣含量為193.90 mg.kg~(-1),需補(bǔ)充含鈣的肥料。2.永順縣植煙土壤有效硫含量豐富。有效硫含量平均為50.88 mg.kg~(-1)。有效硫含量中等水平以上的土樣占86.90%,含量缺乏的土樣僅占10.34%；有效硫含量偏低的土壤主要為高坪鄉(xiāng)和石堤鄉(xiāng),這些鄉(xiāng)鎮(zhèn)土壤建議適當(dāng)施用含硫肥料。3.永順縣植煙土壤交換性鎂含量適宜。交換性鎂平均含量為178.26 mg.kg~(-1)。交換性鎂含量達(dá)中等以上的土樣占70.75%,缺乏的土樣占29.25%,極缺乏的土樣占4.76%。植煙土壤中交換性鎂含量分布不平衡,空間變異較大。全縣西南部和中部交換性鎂含量豐富,北部和南部成缺乏和極缺乏狀態(tài)。4.采用分組方法分析了土壤pH、土壤類型、有機(jī)質(zhì)與鈣、鎂、硫元素含量的關(guān)系。交換性鈣和交換性鎂的含量都隨著pH的升高而升高的趨勢；石灰土的平均含鈣量最高,水稻土的交換性鈣含量僅次于石灰土；交換性鈣、鎂含量有隨著有機(jī)質(zhì)的升高含量升高的趨勢,植煙土壤有效硫含量有隨有機(jī)質(zhì)的升高而降低的趨勢。
[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.
【學(xué)位授予單位】：湖南農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：S572;S158.3

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