摘要
为深入了解湘西植烟土壤有机质含量区域特征,对湘西州488个烤烟主产区植烟土壤样品进行化验分析研究。结果表明：湘西州植烟土壤有机质总体上属适宜水平,平均值为2.2%,变幅为0.3%~5.4%,变异系数为39.9%,41.5%样本有机质处于适宜范围内,＂缺乏＂和＂偏低＂的植烟土壤样本共占43.5%,＂丰富＂和＂偏高＂的植烟土壤样本之和为15.0%,不同植烟土壤类型的有机质含量差异达极显著水平（P=0.000）,水稻土〉黄棕壤〉黄壤〉红壤〉石灰土〉红灰土,总的来说,从东北部、西部和西南部向州中部及东南方向有机质减少。方差分析结果表明,有随海拔高度的升高而有机质含量增高的趋势,植烟土壤有机质与海拔为显著正相关（P=0.012）,土壤有机质含量与全氮、全磷、有效硼的含量呈极显著相关（P值分别为0.0000、0.0098、0.0029）,与有效硫、交换性镁、交换性钙含量呈显著相关（P值分别为0.036、0.019、0.042）。
Organic matter in 488 soil samples taken from main tobacco-growing field in Xiangxi prefecture were tested in order to understand roundly regional character of organic matter. The results indicated that the overall organic matter value was suitable for tobacco growing, average value was 2.2%, amplitude was 0.3%-5.4%, variable coefficient was 39.9%. Soil samples with the organic matter value in suitable range accounted for 41.5%, soil samples with the organic matter value in＂low＂or＂lack＂range accounted for 43.5%, while in＂high＂or＂rich＂range accounted for 15.0%. The organic matter value of different tobacco-growing soil types reached extremely significant difference（P=0.000）, paddy soil〉 yellow brown loamy soil 〉yellow soil 〉red soil 〉limestone soil 〉red dust soil. As a whole, the organic matter value reduced from the northeast, west and southwest to the southeast and middle part of the prefecture. Variance analysis indicated that the organic matter content increased with the rise of elevation and there was a significantly positive correlation between the two（P=0.012）. Content of total nitrogen, total phosphorus and available boracic had highly significant correlation with the organic matter as P value was 0.0000, 0.0098 and 0.0029, respectively, and available sulphur, exchangeable magnesium and exchangeable calcium were significantly correlated with the organicmatter as P value was 0.036, 0.019 and 0.042, respectively.
出处
《中国农学通报》
2015年第1期69-75,共7页
Chinese Agricultural Science Bulletin
基金
湖南省烟草专卖局(公司)"湘西州山地特色烤烟高效施肥技术研究与示范"(XX14-16Aa03)
关键词
烟草
土壤
有机质
养分
特征
相关性
tobacco
soil
organic matter
nutrient
characteristics
correlation
