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测定了湖南烟区1347个土壤样本的有效态微量元素含量,对其分布特点进行了评价。结果表明:(1)湖南烟区土壤有效锌含量较高,平均为2.24mgkg-1;有效锰含量丰富,平均为27.89mgkg-1;有效铜和有效铁含量极丰富,平均为3.28mgkg-1和81.30mgkg-1;水溶性氯含量适宜,平均为13.99mgkg-1;但有效硼和有效钼含量较低,分别有97.92%和56.35%的土壤样本含量在烤烟生长的临界值以下,均属缺乏状态。(2)湖南各烟区因有效态微量元素含量不同大致可分为4类,第Ⅰ类由桂阳独自成类;第Ⅱ类包括永州和浏阳;第Ⅲ类包括宁乡和怀化;第Ⅳ类包括常德、张家界、龙山和凤凰,并对各类的特点进行了描述。
The content of available trace elements in 1347 soil samples in Hunan tobacco growing area was determined and its distribution characteristics were evaluated. The results showed that: (1) The effective zinc content of soils in Hunan tobacco area was high, with an average of 2.24mgkg-1; the available manganese content was rich, with an average of 27.89mgkg-1; the available copper and available iron were extremely abundant with an average of 3.28mgkg-1 And 81.30mgkg-1, respectively. The average content of water-soluble chlorine was 13.99mgkg-1. However, the content of available boron and available molybdenum were lower, and the soil samples contents of 97.92% and 56.35% were below the critical value of flue- Lack of status. (2) Each tobacco area in Hunan Province can be divided into four categories due to the different content of available trace elements, the first category is Guiyang alone; the second category includes Yongzhou and Liuyang; the third category includes Ningxiang and Huaihua; the fourth Classes include Changde, Zhangjiajie, Longshan and Phoenix, and described the characteristics of various types.