贵州遵义植烟土壤微量元素含量状况及分析

Distribution of Soil Micronutrients in Zunyi Tobacco-growing Area

为科学补充烟田微量元素,平衡烟株营养,进一步改善烟叶质量,对遵义10个产烟县(市)356个植烟土壤样本中有效态微量元素进行了测定。结果表明,遵义市植烟土壤有效铁和有效锰平均含量达到32.51mg/kg和69.09mg/kg,含量极丰富;有效铜平均含量为1.28mg/kg,含量丰富;有效硼、有效锌和水溶性氯分别为0.71mg/kg、1.35mg/kg、11.71mg/kg,含量偏低。这几种微量元素在不同生态区、不同土壤类型和不同县域间都存在差异。聚类分析表明,Ⅰ类是南部余庆,其特点是高硼、中锌、高铜、中氯;Ⅱ类包括北部道真、桐梓、湄潭、凤冈和务川,其特点是低硼、低锌、中铜、低氯;Ⅲ类为中部的绥阳、正安、仁怀和遵义县,其特点是低硼、低锌、中铜、中氯。

In order to supply micronutrients to tobacco fields, balance nutrition of tobacco plant to improve the quality of tobacco, the microelement contents in 356 soil samples of Zunyi tobacco-growing areas were determined, and their distribution was evaluated. Available Fe and Mn contents were very rich in the tobacco-growing soils of Zunyi with the mean of 32.51mg/kg and 69.09 mg/kg, respectively; Available Cu content was rich with 1.28 mg/kg; Available B, Zn and solution CI were low with the mean of 0.71 mg/kg, 1.35 mg/kg, 11.71 mg/kg, respectively. Soil microelements contents had discrepancy in different ecology, altitude, agrotype, and county. According to the cluster analysis results, the soil samples of Zunyi were divided into 3 groups. The first group was Yuqing with high B, middle Zn, high Cu, middle Cl; The second group included Daozhen, Tongzi, Meitan, Fenggang, Wucuan with low B, low Zn, middle Cu, low Cl; The third group included Suiyang, Zheng＇an with low B, low Zn, middle Cu, and middle Cl.