曲靖土壤类型分布及养分特征

为了解云南曲靖不同植烟土壤类型的分布情况及养分特征,采集曲靖市9个县(市)土壤样品进行了分析。结果表明,曲靖市植烟土壤可分为6类(石灰岩土、黄壤、紫色土、红壤、水稻土和新积土)。红壤在各县均有广泛分布,水稻土主要分布在陆良北部,马龙大部,沾益的西部,新积土主要分布在除沾益和师宗的陆良其他县(市),此3种土壤类型相似,主要为壤土,有机质、碱解氮含量很丰富,速效磷含量丰富,速效钾丰缺比例相当。黄壤分布在罗平大部和富源南部,以黏土为主,各种养分均很丰富。石灰岩土主要分布于宣威的普立,质地以壤土为主,有机质和碱解氮含量很丰富,速效磷和速效钾缺乏。紫色土主要分布在宣威、会泽的北部,其他县市有零散分布,主要为壤土,有机质、碱解氮含量丰富,但与其他土类相比含量最低,速效磷含量丰富。

Soil Type Distribution and Nutrient Contents in Qujing

To find out soil type distribution and soil nutrient characteristics in Qujing, soil samples were taken from 9 counties of Qujing and their nutrient contents were determined. The results showed that there were 6 soil types, including limestone soil, yellow soil, purple soil, red soil, paddy soil and alluvial soil. Limestone soil was mainly located in Puli, Xuanwei. The organic matter content and available nitrogen in Limestone soil were extremely rich, the available phosphorus and available potassium contents were insufficient. The yellow soil was mainly located in the most of Luoping and the southern Fuyuan. The contents of all nutrients in the yellow soil were rich. The purple soil was mainly located in the northern Xuanwei and Huize, and also scattered in the other areas. In the purple soil, the organic matter contents and available nitrogen were rich, but significantly lower than the other soil types, the content of available phosphorus was rich, the content of available potassium was rich or lack. Red soil was located in all counties. Paddy soil was mainly located in the northern Luliang, most of Malong and the west of Zhanyi. Alluvial soil was located in addition to Zhanyi, Shizong and Luliang. In those soil types, the organic matter content and alkali solution nitrogen were extremely rich, the available phosphorus content was rich, and the available potassium content was rich or lack.