不同植物篱在减少雷竹林氮磷渗漏流失中的作用  

EFFECT OF HEDGEROWS REDUCING OF NITROGEN AND PHOSPHORUS LEACHING LOSS FROM PHYLLOSTACHYS PRAECOX STANDS

作　　者：许开平[1] 吴家森[1] 黄程鹏[1] 姜培坤[1] 

机构地区：[1]浙江农林大学环境与资源学院,浙江临安311300

出　　处：《土壤学报》2012年第5期980-987,共8页Acta Pedologica Sinica

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07101-006)资助

摘　　要：为了解不同植物篱对雷竹林氮磷渗漏流失拦截的效果,在集约经营雷竹林下坡设置黑麦草(草篱)、红叶石楠+金森女贞(灌木篱)和半野生状态粗放经营雷竹林(雷竹篱)3种植物篱,于2010年6月至10月采样并分析其渗漏水。结果表明,3种植物篱对集约经营雷竹林氮磷渗漏流失拦截效果明显,拦截前后氮磷浓度差异达极显著水平,但不同植物篱的拦截效果差异并不显著。对氮的拦截量表现为雷竹篱(81.3 kg hm-2),草篱(81.1 kg hm-2),灌木篱(77.0 kg hm-2),拦截率分别为61.0%,60.8%和57.7%;对磷的拦截量表现为雷竹篱(4.9 kg hm-2),草篱(4.7 kg hm-2),灌木篱(4.3 kg hm-2),拦截率分别是49.0%、46.9%、43.1%。半野生态粗放经营雷竹作为植物篱,既可减少氮磷面源污染,又可节省种植时间和费用,同时收获笋材,具有较大的推广价值。A field study was conducted to evaluate effects of hedgerows reducing nitrogen and phosphorus leachingloss from intensively managed Phyllostachys praecox stands. Three types of hedgerows composed of Lolium perenne L. ,Pho- tinia X. and Ligttstrum japonicum mixture, and extensively managed P. praecox groves, separately, were set up. Samples of subsurface leachate were taken at O. 3m depth on both sides of the hedgerows between June and October in 2010 for analy- sis of concentrations of nitrogen and phosphorus. All the three types of hedgerows intercepted large amounts of nutrients, thus significantly reducing concentrations of nitrogen and phosphorus in the leachates collected at the down slopes of the hedgerows. But the effects varied only slightly between hedgerows, showing a decreasing order of hedgerow of naturalP. praecox （N 81.3 kghm-2and P4.9 kghm^-2） 〉 hedgerow ofL. perenne （N81.1 kg hm^-2 and P4.7 kg hm^-2） 〉hedgerow of Photinia X. and L. japonicum mixture （ N 77.0 kg hm^-2 and Pd. 3 kg hm^-2）. Up to 61% of the nitrogen and 49% of the phosphorus in the leachate from the upslope P. praecox stands were intercepted by the hedgerows. Among the three types of hedgerows, the one of extensively managed P. praecox groves was the most worthy of extrapolating, be- cause it does not only reduce N and P non-point source pollution,but also save time and labor in setting up the hedgerow and produce marketable bamboo shoots as well,

关 键 词：植物篱 雷竹 氮 磷 渗漏水 

分 类 号：S714.7[农业科学—林学] X506[环境科学与工程—环境工程]