贵州植烟土壤有机质与氮素特征研究

利用 GPS 定位,3 年在全省 50 个烟叶主产县采集 9340 个植烟土壤耕层土样进行分析。结果表明,贵州植烟土壤有机质和全 N 含量变幅大,平均含量分别为 29.6 g/kg 和 1.75 g/kg,达丰富水平,两者处于最适宜含量范围的土壤样本分别占 48.4 %和 64.1 %。速效 N含量平均 50.6 mg/kg,处于最适宜含量范围的土壤样本占 42.4 %。不同植烟土壤类型有机质和全 N 含量差异较大,水稻土较高,紫色土较低。植烟稻田全 N明显高于旱地。

ORGANIC MATTER AND NITROGEN IN TOBACCO-GROWING SOILS IN GUIZHOU

With the aid of GPS, 9340 soil samples were collected from 50 major tobacco-growing counties of Guizhou province and analyzed within 3 years. The results indicate that tobacco-growing soils in Guizhou are rich and vary sharply in organic matter content and total nitrogen content, which averages out 29.6g/kg and 1.75g/kg, respectively. And soil samples with organic matter content and total N content in the most suitable range account for 48.4% and 64.1%, respectively. The soil samples with available nitrogen contents in the most suitable range account for 42.4%, averaging 50.6mg/kg. Meanwhile, paddy soils are high and purple soils low in both the organic matter content and total nitrogen content and tobacco-growing paddy soil is significantly higher than upland soil in total nitrogen.