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对宣城市岗坡地土壤养分特征及其与颗粒组成关系进行了分析,结果表明:⑴不同土地利用类型中,林地土壤有机质和全氮含量显著高于其它3种土地利用类型;耕地和新耕地土壤全磷、速效养分含量都高于林地和灌丛;土壤有机质、速效氮和速效磷含量与土地利用类型有显著的相关性。⑵土壤有机质、全氮含量中、上坡位都显著高于下坡位,全磷和速效养分的含量随坡位下降呈显著增加趋势;有机质、全磷和速效磷与坡位有显著的相关性。⑶土壤有机质与粘粒(<0.002 mm)和粉粒(0.002~0.02 mm)的含量均呈显著的正相关,与砂粒(0.02~2 mm)含量呈显著负相关,全氮与粉粒含量呈现显著正相关,全磷与粉粒、砂粒含量显著正相关。
The results showed that: (1) among different land use types, the contents of soil organic matter and total nitrogen in forest land were significantly higher than those in the other three kinds of land use types; the cultivated land and newly cultivated land Total phosphorus and available nutrients were higher than those in forestland and shrubs. Soil organic matter, available nitrogen and available phosphorus were significantly correlated with land use types. (2) In the soil organic matter and total nitrogen content, the uphill position was significantly higher than that in downhill position, and the total phosphorus and available nutrient contents were significantly increased with the slope position decreasing. The contents of organic matter, total phosphorus and available phosphorus were significantly correlated with the slope position Sex. (3) There was a significant positive correlation between soil organic matter and clay (0.002 mm) and silt (0.002-0.02 mm), negatively correlated with sand (0.02-2 mm), total nitrogen and silt content Significantly positive correlation between total phosphorus and silt, sand content was significantly correlated.