遵义市植烟土壤有机质含量变化特征

为掌握贵州省遵义市植烟土壤有机质含量变化特征,采用传统统计学的方法分析了遵义市2006年和2012年植烟土壤耕层有机质含量的分布状况以及变化情况。结果表明,遵义市2006年植烟土壤有机质含量均值为25.4 g/kg,变异系数为32.11%,2012年全市均值增加到32.6 g/kg,变异系数为29.06%,有机质年均增加1.21 g/kg;2006年全市土壤有机质含量在缺乏等级(10 g/kg)的比例为1.12%,2012年降为0.72%;2006年偏低等级(10~20 g/kg)的比例为24.16%,2012年降为6.31%;适宜等级(20~30 g/kg)比例由2006年的53.37%降为2012年的34.00%;偏高及以上等级(30 g/kg)比例由2006年的21.35%增加到2012年的58.97%,其中土壤有机质含量为高等级(40 g/kg)的比例由5.62%增加到21.23%。遵义市植烟土壤有机质含量总体处于适宜水平,需要根据土壤有机质含量因地制宜的进行有机肥施用量的调控。

Variation Characteristics of Organic Matter Content of Tobacco-Growing Soil in Zunyi City

To understand the organic matter content change characteristics of tobacco-growing soil in Zunyi city,Guizhou province,the distribution and change situation of soil organic matter content in 2006 and 2012 was analyzed using traditional statistical methods.Results showed that the average organic content of tobacco-growing soil in Zunyi in 2006 was 25.4 g/kg,and coefficient of variation was 32.11％;the content increased to 32.6 g/kg in 2012,the variation coefficient was 29.06％,and increased 1.21 g/kg per year averagely.The soil organic matter content in the absence level (＜10 g/kg) accounted for 1.12％ in 2006,fell to 0.72％ in 2012;Low level (10～20g/kg) accounted for 24.16％ in 2006,fell to 6.31％ in 2012;Appropriate level (20～30 g/kg) accounted for 53.37％ in 2006,fell to 34.00％ in 2012;High or higher level (＞30 g/kg) accounted for 21.35％ in 2006,increased to 58.97％ in 2012,and of which,high level (＞40 g/kg) increased from 5.62％ to 21.23％.It showed that the organic matter content of tobacco-growing soil in Zunyi was in an appropriate level,and its application should be regulated according to the content of soil organic matter.