四川乌蒙山区表层土壤中养分元素地球化学特征与评价

Sichuan WuMeng Mountain District Surface Soil Nutrient Element Geochemical Characteristics and Evaluation

土壤中养分元素作为植物生命物质的来源具有重要作用。四川乌蒙山区土地质量地球化学调查评价显示,麻城乡、摩尼镇以较一等和二等土地为主。表层土壤中有效铁、铜、锌、硫的含量丰富和很丰富占比超过80%,有效钼和锰的含量丰富和很丰富占比超过50%。部分地区磷、有机质、氧化钙、硼较为缺乏,需要根据区域元素缺乏种类,分布范围,有针对性地补施相应的肥料。

The soil nutrient elements play an important role in the plant life. The reasults of WuMeng mountain areas land quality geochemical survey evaluation show that ： The first-class and second-class land take the most proportion in Macheng and Moni, The proportion of effective Fe, Cu , Zn and S who’s content are rich or very rich are more than 80 % , Mo and Mn are more than 50%. Parts of land is lack of beneficial elements, organic matter, CaO and B. According to the deficiency elements and distribution range, it’s better to fertilize in these area pertinently.