贵州安顺市不同土地利用类型土壤养分特征研究

    Analysis on soil nutrients of different land utilization type in Guizhou Anshun Area

    • 摘要: 研究了贵州安顺区不同土地利用类型(蔬菜地、水田和林果地)土壤养分分布特征,结果表明贵州安顺区土壤pH 值偏小,整体上呈酸性;不同土地利用类型土壤养分差异较大,土壤有机碳、全氮、全磷和全钾均呈现出一致性规律,大致表现为水田>蔬菜地>林果地,而3 种不同土地利用类型土壤全磷差异均不显著;土壤有效养分均呈现出一致性规律,均表现为水田>蔬菜地>林果地,并且土壤有效养分在3 种不同土地利用类型均达到显著差异水平;3 种不同土地利用类型土壤有效养分空间变异系数高于土壤全量养分;土壤养分均表现出明显的“表聚性”。相关性分析表明,3 种不同土地利用类型土壤全量养分之间均具有良好的线性正相关性(P<0.01),且土壤全量养分与有效养分均呈现出一定的相关性。

       

      Abstract: Soil nutrients of different land utilization type in Guizhou Anshun area were studied in this paper. The results showed that Guizhou Anshun area was slightly acidic with a lower pH. Soil nutrients of land utilization type had a significant difference,soil organic carbon,total nitrogen,total phosphorus and total potassium were presented a consistency rule with paddy field area> vegetable area > fruit area,while soil total phosphorus of different land utilization type had no significant difference. Soil available nutrients of different land utilization type had a significant difference and presented a consistency rule with paddy field area> vegetable area > fruit area. Spatial variation index of soil of total nutrients was higher than soil available nutrients,the soil total and available nutrients of different land utilization type in Guizhou Anshun area presented an obvious phenomenon of “surface accumulation”. Correlation analysis showed that the soil nutrients of different land utilization type in Guizhou Anshun area had a good linear positive correlation(P < 0.01),and soil total nutrients showed a certain correlation with soil available nutrients.

       

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