霜冻恢复措施对麻竹林生长特性的影响

以遭受霜冻的麻竹（Dendrocalamus latiflorus）为试验材料，研究在2016—2018年3种霜冻恢复措施对麻竹立竹生长和竹笋生长特性的影响，运用主成分分析对3种霜冻恢复措施进行综合评价。结果表明：3种霜冻恢复措施对竹高、胸径、丛幅、笋地径、笋高、笋质量及出笋数量均具有影响。皆伐后常规经营模式下的立竹生长指标和笋生长特性指标均逐年增大，其中2017年和2018年竹丛丛幅、笋总质量和笋数量大于其他2种模式；持续常规经营模式下的麻竹立竹竹高、胸径和平均笋基径最大；无人工经营模式下的立竹各生长指标和笋生长指标最小。主成分分析表明，麻竹遭受霜冻后，采取持续常规经营措施能够保证麻竹生长和笋产量的增加，带来更高的经济效益。

Effects of Frost Recovery Measures on Growth Characteristics of Dendrocalamus latiflorus Forest

To reveal the effects of frost recovery measures on the growth characteristics of Dendrocalamus latiflorus and its shoots, three kinds of measures had been applied to the forest once suffered from frost. Comprehensive evaluation of the measures was carried out with the data generated from 2016 to 2018 using the principal component analysis. The results showed that three kinds of frost measures all had some effects on bamboo height, diameter at breast height (DBH), cluster width, shoot ground diameter, shoot height, shoot weight and shoot quantity. In conventional management mode after clear-cutting (treatment A), the index of culm growth and shoot growth characteristics of D. latiflorus had increased year by year, among which the crown width, total weight and number of bamboo shoots were higher than those of the other two modes in 2017-2018. In the continuous conventional management mode (treatment B), the culm height, culm DBH and average shoot ground diameter were all the largest. The growth indexes of culm and shoot were the lowest in non-artificial management mode (treatment C).The result of principal component analysis indicated that after D. latiflorus suffered from frost, the continuous conventional management measures (treatment B) could ensure the growth of bamboo and increase the yield of bamboo shoots, resulting in higher economic benefits.