杭州市余杭区早竹林冰冻雪灾的损害及其影响因子

The Frozen and Snow Damage to Phyllostachys praecox f. Prevelnalis and Its Influencing Factors in Yuhang District,Hangzhou City

研究浙江省余杭区2015年冬季冰冻雪灾对早竹林的损害及其影响因子,结果表明：雪灾对早竹林破坏较严重,各类受损竹比例17.5%,其中翻蔸竹12.0%,断裂竹4.5%。断裂主要发生在胸径为4.0-5.0 cm的1年生早竹,而3.0-4.0 cm的早竹容易发生翻蔸;立竹密度与受害程度的相关性不显著;早竹受损害程度与建园历史、土壤碱解氮、有效磷含量呈显著正相关（P〈0.05）,而与土壤速效钾和p H值的负相关性也达显著水平（P〈0.05）,且与土壤有机质呈二项式显著相关（P〈0.05）。土壤质量的劣变,加剧了早竹的冰雪损害程度,因此减量配方施肥,平衡土壤养分是提高早竹林抗性的有效途径。

The frozen and snow damage to Phyllostachys praecox f.Prevelnalis and its influencing factors in Yuhang District, Zhejiang Province in the winter of 2015 were studied.The results showed that the snow disaster destroyed the bamboo forests seriously, and resulted in a damage rate of 17.5%, including a lodging rate of 12.0% and a broken rate of 4.5%.The 1-year-old bamboos with DBH of 4.0-5.0 cm were easy to be broken, while and those with DBH of 3.0-4.0 cm were prone to lodging.The damage rate was positively correlated with planting history, content of available N and P （P〈0.05）, negatively correlated with available K and pH of the soil （P 〈0.05）, and binomially correlated to the soil organic matter （P〈0.05）.It was not significantly correlated with the density of bamboos.Soil quality deterioration exacerbated the frozen and snow damage.Thus, to balance soil nutrient through formula fertilization was an effective way to increase the resistance of the bamboo forests.