毛竹笋用林雪灾后恢复典型事例浅析

2008年1月中旬至2月上旬,连续低温雨雪天气造成嵊州严重雪灾,嵊州的毛竹笋用林受到不同程度的影响.通过对5个典型样地冰雪灾害前后以及采取恢复技术措施后的竹笋产量和新竹调查表明,冰雪灾害造成未钩梢毛竹林内35.03%的毛竹倾斜或折断,经钩梢的毛竹林的倾斜或折断竹仅为8.61%;2008年春笋产量明显低于2007年,平均下降29.53%,新竹眉围也比2007年平均降低16.14%;采取恢复技术措施管理后,2009年春笋产量和新竹眉围得到明显提高,已恢复到雪灾前水平,并总结了竹林灾后恢复技术措施.

Analysis on Recovery from Snow Disaster of Phyllostachys heterocycla var. pubescens Stands for Shoot Production

In January and February of 2008, Phyllostachys heterocycla var. pubescens stands for shoot production in Shengzhou, Zhejiang province were suffered from low-temperature freezing rain and snow disaster. Investigations on shoot yield and new bamboo before and after the disaster and measurements undertaken for recovery demonstrated that stands without topping had 35.03% bamboos inclined and broken, while that with tipping had only 8.61%. Spring shoot yield in 2008 decreased evidently compared with that in 2007, with mean rate of 29.53%, circumference at eyebrow height of new bamboo in 2008 decreased by 16.14% compared with that in 2007. Technique for recovery after the disaster resulted increase of shoot yield and circumference at eyebrow height of new bamboo.