攀枝花市烟区土壤有机质及氮素变化分析

The Variation Analysis of Soil Organic Matter and Nitrogen in Panzhihua Tobacco-growing Area

为了探明四川省攀枝花市烟区土壤有机质和氮素含量的变化趋势,于2015年对该烟区170份耕层土壤样品进行了检测,结合2009—2010年土壤相关数据进行分析。结果表明,与2009—2010年相比,攀枝花市烟区土壤有机质含量平均降幅达23.0%,其中米易县土壤有机质含量提高了14.9%,盐边县与仁和区土壤有机质含量分别降低了39.0%和22.4%;按土壤有机质分级标准,全市54.71%的土壤有机质缺乏,仁和区、盐边县、米易县烟区分别有76.48%、58.34%和14.58%的土壤有机质缺乏。全市土壤碱解氮降低9.5%,米易县土壤碱解氮提高了26.5%,盐边县和仁和区则分别降低了21.6%和11.0%。

To find out the change trend of soil organic matter and nitrogen in Panzhihua tobacco-growing area,170 soil samples of top layer were tested and analyzed combining with the soil relevant data during 2009 to 2010. The results showed that the soil organic matter contents were decreased and the average drop of 23.0% compared with five years ago,of which the Miyi tobacco-growing area was increased by 14.9%,Yanbian tobacco-growing area and Renhe tobacco-growing area were reduced by 39.0% and 22.4%,respectively. According to the classification of soil organic matter,the ratio of samples lacking soil organic matter in Panzhihua tobacco-growing area was 54.71%,and in Renhe, Miyi and Yanbian was 76.48%,76.48%and 14.58%,respectively. Alkaline N decrease 9.5% in Panzhihua tobacco-growing area compared with five years ago,and the alkaline N increase 26.5% in Miyi tobacco-growing area, but decrease 21.6% and 11.0% in Yanbian county and Renhe tobacco-growing area,respectively.