论文部分内容阅读
为了解黔西南州植烟土壤pH分布特征及其与土壤养分的关系,采用传统统计学和地统计学及灰色关联方法分析了黔西南州植烟土壤pH状况、空间分布及其与土壤养分的关系。结果表明:(1)邵阳烟区植烟土壤pH总体上适宜,平均值为6.65,变幅为4.68~7.87,变异系数为11.72%,处于适宜范围内的样本占51.04%;(2)植烟土壤pH值的均值从高到低依次为:安龙县、兴义市、兴仁县、贞丰县、晴隆县和普安县,安龙县植烟土壤pH值极显著高于其他各县;(3)土壤pH有随土壤质地偏粘而降低的趋势;(4)黔西南州植烟土壤pH值有从南向北递减的分布趋势,在安龙县有一个高值区,在普安县有一个低值区;(5)铵态氮、硝态氮、速效钾与土壤pH的相关性达到显著或极显著负相关;(6)土壤养分与土壤pH的关联顺序为缓效钾>碱解氮>有机质>速效磷>全氮>全磷>速效钾>铵态氮>硝态氮。
In order to understand the relationship between soil pH and soil pH in tobacco planting areas in southwestern Guizhou Province, the relationship between soil pH and tobacco planting soil pH was analyzed by traditional statistics, geostatistics and gray relational methods. relationship. The results showed that: (1) The soil pH of Shaoyang tobacco growing area was generally suitable, the average was 6.65, the amplitude ranged from 4.68 to 7.87, the coefficient of variation was 11.72%, and the samples in the suitable range accounted for 51.04%; (2) The average value of soil pH from high to low was as follows: Anlong County, Xingyi City, Xingren County, Zhenfeng County, Qinglong County and Pu’an County, Anlong County, tobacco planting soil pH value was significantly higher than other counties; (3) Soil pH tends to decrease with the bias of soil texture; (4) The distribution of soil pH in tobacco planting in southwestern Guizhou tends to decrease from south to north. There is a high value area in Anlong County, (5) A significant or extremely significant negative correlation was found between ammonium nitrogen, nitrate nitrogen, available potassium and soil pH; (6) The order of soil nutrients and soil pH was slow potassium> alkali N> organic matter> available phosphorus> total nitrogen> total phosphorus> available potassium> ammonium nitrogen> nitrate nitrogen.