不同土地利用方式下土壤生态化学计量特征

Ecochemical Stoichiometric Characteristics of Soil under Different Land Use Patterns

为研究不同土地利用方式下土壤生态化学计量特征,选取贵州省遵义市余庆县水稻种植地(水田)和玉米种植地(旱地)两种土地利用方式的土壤,以及不种植作物的荒地(对照)为研究对象,测定土壤有机碳、全氮及全磷含量并进行差异性分析。结果显示:(1)在不同的土地利用方式下,水田土壤的有机碳和全氮含量最高,全磷含量最低;旱地土壤的全氮含量最低;(2)不同的土地利用方式下,水田土壤的C/N、C/P、N/P均最高,且与荒地、旱地土壤均存在显著性差异;(3)相关性分析表明,全氮随有机碳含量的增加而增加,全磷随着有机碳和全氮的增加而降低;C/N随着全磷的增加而降低,N/P随有机碳的增加而增加。

To study the ecological stoichiometry characteristics of soil under different land use modes,two types of land use modes,rice planting(paddy field)and corn planting(dry land)in Yuqing County,Zunyi City,Guizhou Province,were selected as the research objects,and the soil without planting crops was treated as wasteland(control).The content of soil organic carbon,total nitrogen,and total phosphorus was measured and differential analysis was conducted.The results show that:(1)under different land use methods,paddy soil has the highest organic carbon and total nitrogen content,while total phosphorus content is the lowest;the total nitrogen content of dry land soil is the lowest;(2)under different land use methods,the C/N,C/P,and N/P of paddy soil are the highest,and there are significant differences compared to wasteland and dry land soils;(3)correlation analysis shows that total nitrogen increases with the increase of organic carbon content,while total phosphorus decreases with the increase of organic carbon and total nitrogen;C/N decreases with the increase of total phosphorus,while N/P increases with the increase of organic carbon.