施用石灰对雷竹林土壤氮磷流失的影响

摘要

2011年在浙江省临安市采取施用石灰的方法对退化雷竹（Phyllostachys praecox cv. Prevernalis）林土壤氮磷流失进行了田间试验。结果表明，施用石灰可以显著提高土壤的 pH 值；土壤硝态氮、铵态氮与可溶态总氮的流失量分别为719.1、88.58与1058.6 g/hm2，较对照分别减少20.5%、48.6%与17.9%；对土壤磷流失没有显著影响。%Field experiment was conducted at a degraded Phyllostachys praecox cv. prevernalis stand in Lin’an, Zhejiang province in 2011 to investigate the effect of liming on nitrogen and phosphorus loss. Results showed that liming increased soil pH significantly. The loss of nitrate, ammonium and total dissolved nitrogen in treated soil reached 719.1, 88.58 and 1058.6 g/ha respectively, which was lower by 20.5%, 48.6% and 17.9%compared to that in the control(no treatment). However, the experiment indicated that liming had no significant effect on soil phosphorus loss.