广东南雄烟区主要植烟土壤类型养分状况分析

为促进南雄烟区浓香型特色优质烟叶的可持续发展，明确南雄烟区主要植烟土壤类型的养分状况，对南雄烟区181 个耕层土壤样品的养分状况进行了分析，结果表明院南雄烟区植烟土壤pH 值4.30~8.03，紫色土，牛肝土田，白沙泥田和麻沙泥田在适宜范围内的比例分别为49.46%，80%，35.78%和22.08%紫色土相对偏高白沙泥田和麻沙泥田多数偏低，有机质、全氮和碱解氮含量均以紫色土最低，最适宜氮素的调控其余3 种土壤类型均有部分样品含量偏高，需注意控氮，全磷，全钾含量多数为中等至丰富水平，仅白沙泥田和麻沙泥田部分样品为缺乏水平，速效磷含量普遍适宜，速效钾含量多数偏低除绝大多数紫色土供钾丰富外，其余3 种土壤类型均有不同程度的缺钾现象生产中需补施钾肥。

Analysis on nutrient status in the main types of tobaccoplantingsoil in Nanxiong of Guangdong province

181 topsoil samples from Nanxiong tobacco growing area were collected and analyzed in order to understandsoil nutrient status and promote the sustainable development of full aroma-type tobacco in Nanxiong. The results showed thatthe range of pH value was 4.30~8.03 and the proportions within the right scope of purple soil, Ox liver field, white sand field,hemp sand field respectively were 49.46%, 80%, 35.78% and 22.08%. The pH value of purple soil was relatively higher, whilethose of white sand field and hemp sand field were relatively lower. Content of organic matter, total N and available N was verylow in purple soil which was most suitable for N management, while those of other three soil types were relatively higher, theywere needed to control N. Content of total P and total K was mostly medium to rich besides samples from white sand field andhemp sand field. Content of available P was suitable in all soil types. Content of available K was mostly low. Except for most ofpurple soil was rich in available K, other three soil types all had different level of potassium deficiency phenomenon, so it wasneeded to supply potassium in practice.