氮磷添加对草地土壤酸度和化学计量学特征的影响

发布时间：2019-06-29 20:22

【摘要】：以内蒙古温带草原为对象,研究了不同比例和水平的氮磷输入对土壤pH和化学计量学特征的影响。结果表明,与不添加氮磷的对照相比,添加氮磷的土壤pH在氮输入大于30g·m~(-2)的情况下显著降低(P0.05),而在不施加磷肥只施加氮肥的情况下,10g·m~(-2)氮输入也显著降低了土壤pH(P0.05),而且显著低于添加磷肥的处理(P0.05)。另外,与高比例和水平的氮磷输入相比,低比例和水平的氮磷输入显著降低土壤大量元素(钾、钙和镁)、微量元素(铁、锰、铜和锌)和毒性元素(铝和锰)(P0.05),而且还降低土壤N∶P。可能是由于该地区土壤磷含量低,低氮高磷输入缓解植物生长受磷限制,促进植物生长的同时,降低土壤养分。由此可见,根据当地土壤养分和氮输入的量,适量添加磷可以缓解外源氮输入对土壤pH和化学计量学特征的影响。
[Abstract]:The effects of nitrogen and phosphorus inputs on soil pH and chemometrics characteristics in temperate grasslands of Inner Mongolia were studied. The results showed that compared with the control without nitrogen and phosphorus, the pH of soil added with nitrogen and phosphorus decreased significantly when the nitrogen input was more than 30g 路m ~ (- 2) (P 0.05), and the input of 10 g 路m ~ (- 2) nitrogen also decreased the soil pH significantly when the nitrogen fertilizer was not applied (P 0.05), and was significantly lower than that of the treatment with phosphate fertilizer (P 0.05). In addition, compared with high proportion and level of nitrogen and phosphorus input, low proportion and level of nitrogen and phosphorus input significantly decreased a large number of elements (potassium, calcium and magnesium), trace elements (iron, manganese, copper and zinc) and toxic elements (aluminum and manganese) (P 0.05), and also decreased soil N 鈮，

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