重庆市多穗柯生长区土壤有机质含量和养分含量的差异分析

目的]研究多穗柯在重庆市生长环境的土壤养分和有机质含量的差异,为该区野生甜茶的资源管理提供参考。方法]采集多穗柯生长区土壤样品,对土壤样品化学性质进行测定。结果](1)经过不同地区土壤剖面有机质含量比较,重庆市奉节龙池乡华吉村多穗柯生长区土壤表层有机质在各个地区含量最多,为3.95g/kg,并对多穗柯茶生长区土壤化学性质具有很大的影响。(2)各个地区多穗柯生长区土壤剖面化学性质存在显著性差异,尤其是土壤全N含量在土壤表层和深层存在及其显著性差异。(3)土壤全N含量在重庆梁平龙胜乡龙胜村样地表层出现最大值,达到了0.94g/kg;土壤速效钾含量也是在重庆市梁平龙胜乡龙胜村样地表层出现最大值,达到了115mg/kg;土壤速效磷含量在重庆北碚东阳镇艾路村样地出现最大值,为4.7g/kg。结论]依据多穗柯甜茶生长区土壤肥力状况差异,结合样地实际情况分析表明,重庆市梁平龙胜乡龙胜村地区的土壤肥力水平在各个调查样地是最优的。

Analysis on Content Differences of Soil Organic Matter and Nutrients in Growth Zone of Lithocarpus Polystachyus in Chongqing City

Objective] The contents of soil organic matter(SOM) and nutrients in the growth zones of Lithocarpus polystachyus in Chongqing City were investigated in order to guide the soil nutrition management for sugar-beet plantation.Methods] Soil samples in the growth fields of Lithocarpus polystachyus were sampled and the soil nutrients were assayed.Results] (1) Growth zone of Huaji County was observed with the biggest SOM content of 3.95 g/kg.(2) Significant differences in soil nutrients in growth zones of Lithocarpus polystachyus were found and soil total nitrogen content between top layer and deep horizons was significant different.(3) Both soil total nitrogen and available potassium had its maximum contents at Longsheng County, with the values of 0.94 g/kg and 115 mg/kg, respectively. Zone with the maximum soil available phosphorus appeared at Ailu County, had the content of 4.7 mg/kg.Conclusion] Soil fertility in Longsheng County zone is as best as Lithocarpus polystachyus grow in the investigated zones of Chongqing City.