遵义烟区土壤有效硅含量评价

Soil Available Silicon Content in Flue-cured Tobacco in Zhunyi

为了查明遵义烟区土壤有效硅的分布状况,在遵义县和仁怀市共采集87份耕层土壤样品并进行了分析。结果表明,土壤有效硅含量在30.24～444.89 mg/kg之间,平均值为169.75 mg/kg,变异系数为73.27%。如果以100 mg/kg作为烟区土壤有效硅的临界值,则有20.69%的土壤缺硅。不同类型土壤有效硅含量平均值黄壤最高,石灰土次之,水稻土最低。不同母质发育的土壤有效硅含量从高到低依次为页岩>石灰岩>白云岩>泥灰岩>白云质灰岩>第四纪粘土>黄色砂岩。在酸性至中性土壤中,有效硅含量与pH存在极显著正相关关系。

In order to identify the distribution of soil available silicon in Zhunyi tobacco area,87 soil samples of plow layers from Zhunyi county and Renhui county were analyzed.The results indicated that soil available silicon content ranged from 30.24 to 444.89 mg/kg,with an average of 169.75 mg/kg,and the variation coefficients was 73.27%.If using 100 mg/kg as the deficient critical point of soil silicon,20.69% of the soils were silicon deficient.Soil available silicon content was found that yellow soil calcareous soil rice soil,and in term of soil parent material,shale limestone dolomite marl dolomite limestone Quaternary clay yellow sandstone.There was no significant relationship between the soil available silicon content and the organic content or the altitude of sampling points,but there were significantly positive correlations between the soil available silicon content and the soil pH.