论文部分内容阅读
[目的]对合理布局长顺县特色优质烟叶生产提供参考。[方法]利用GPS定位,在贵州省长顺县采集172份植烟土壤样品,采用地统计学进行土壤主要养分空间变异分析。[结果]长顺县植烟土壤有机质、碱解氮、有效磷和速效钾的平均值分别为27.54、141.77、40.62和215.07 mg/kg,变异系数分别为24.53%、23.68%、64.11%和56.06%。有机质、碱解氮、有效磷和速效钾均表现出明显的空间趋势效应和中等的空间相关性。从空间分布来看,长顺县大部分植烟土壤有机质处于适宜水平,而碱解氮、有效磷和速效钾含量较为丰富;少部分植烟土壤有机质含量偏高或偏低,而碱解氮、有效磷和速效钾含量偏低。[结论]在土壤养分丰富的烟区应适当减少用肥量,而在养分偏低的烟区适当增加用肥量,以保证植烟土壤养分维持在烤烟生长的适宜水平。
[Objective] The study aimed to provide reference for the reasonable layout of Changshu County’s specialty high-quality tobacco. [Method] With the use of GPS positioning, 172 tobacco-growing soil samples were collected in Changshun County of Guizhou Province. Geostatistics was used to analyze spatial variability of soil nutrients. [Result] The average values of soil organic matter, available nitrogen, available phosphorus and available potassium in tobacco planting soil in Changshun were 27.54, 141.77, 40.62 and 215.07 mg / kg respectively, and the coefficients of variation were 24.53%, 23.68%, 64.11% and 56.06 respectively %. Organic matter, available nitrogen, available phosphorus and available potassium showed obvious spatial trend and moderate spatial correlation. In terms of spatial distribution, the organic matter content of most tobacco-growing soils in Changshun County was at an appropriate level, while the content of available nitrogen, available phosphorus and available potassium were relatively abundant. The contents of organic matter in some tobacco-growing soils were either high or low, , Available phosphorus and potassium content is low. [Conclusion] The amount of fertilizer should be reduced appropriately in tobacco-rich soil area, while the amount of fertilizer should be increased appropriately in tobacco area with low nutrient content so as to ensure the tobacco soil nutrients maintained at the appropriate level for the growth of flue-cured tobacco.