硅肥对雷竹林生长影响研究

Effect of Silicon Fertilizer Application on Plantation of Phyllostachys violascens

针对覆盖雷竹林立地生产力衰退和土壤硅素供应不平衡的现象,分析施硅肥对雷竹生长及土壤供硅能力的影响,探讨雷竹林施硅肥的时间和施肥量。试验的硅肥施用量水平为:0、75、225和675 kg/hm2,于2012年5月中旬以高效硅肥作基肥施入种植10年的雷竹林,测定施肥后每个月的土壤有效硅含量、pH值、叶片硅积累含量、硅积累速率及4个月时叶片光合参数。研究表明:在雷竹抽枝长叶前期,以675 kg/hm2的硅肥施用量能有效地增加土壤有效硅含量、pH值、叶片硅含量及积累速率,促进光合速率。因此,在雷竹抽枝长叶前期,施675 kg/hm2的硅肥能促进雷竹的生长,提高土壤供硅能力。

Effects of silicon fertilizer on the growth of Lei bamboo and the ability of soil to supply available silicon were studied with plantation of Lei bamboo so as to find out the fertilizing amount and time.The test,in which that efficient silicon fertilizer as base fertilizer was applied to plantation of Lei bamboo,was proceeded in the middle of May 2012 at the application levels of 0 kg/hm2,75 kg/hm2,225 kg/hm2 and 675 kg/hm2.The measured details of the test were soil available silicon,soil pH,silicon accumulation of leaves,silicon accumulation rate of every month and photosynthetic parameter of the forth month.The results showed that silicon fertilizer at the level of 675 kg/hm2 in the early growth stage could effectively increase soil available silicon,soil pH,silicon accumulation of leaves and silicon accumulation rate of every month,and promote photosynthesis of Lei bamboo.Silicon fertilizer can promote growth of Lei bamboo and enhance ability of soil to supply available silicon.