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为揭示冬季地表有机材料覆盖促进竹笋早出的林地覆盖经营措施对雷竹叶片营养质量的影响,并基于叶片的食叶害虫适口性分析林地覆盖经营对雷竹林食叶害虫发生与成灾的影响,探讨了休养式覆盖经营(覆盖3年休养3年)、长期覆盖经营(连续覆盖6年)和不覆盖雷竹林(CK)1~3年生立竹叶片C、N、P、可溶性糖、蔗糖、淀粉、纤维素、木质素、单宁、草酸和酚酸等含量的差异。结果表明:与不覆盖雷竹林相比,休养式林地覆盖经营雷竹林1~3年生立竹叶片C含量变化不明显,淀粉、纤维素、酚酸含量均显著降低。除上述指标外2、3年生立竹叶片其他指标均显著升高,1年生立竹叶片木质素、草酸含量显著升高;长期覆盖经营雷竹林1、2年生立竹叶片酚酸含量无显著变化,P、草酸、木质素含量显著升高,其他指标均显著降低;3年生立竹叶片P、蔗糖、木质素、草酸、酚酸含量显著升高,其他指标均显著降低;长期林地覆盖经营对雷竹叶片C、N、P养分平衡也产生了明显影响。林地覆盖经营对雷竹叶片的营养质量和食叶害虫适口性产生了较为明显的影响,其中,休养式覆盖经营雷竹林叶片营养质量和防御物质含量提高,叶片的食叶害虫适口性降低,抵御食叶害虫为害能力增强,而长期覆盖经营雷竹林相反,可能更易诱发食叶害虫的发生与成灾。
In order to reveal the effect of winter surface organic material coverage to promote the bamboo shoots pre-out forestland management practices on the nutritional quality of leaves, and based on the palatability of leaf blade pests to analyze the impact of forest cover management on the occurrence and disaster of leafy insect pests, (Including 3 years of recuperation for 3 years), long-term management (covering 6 years of continuous coverage) and 1 to 3 years of Phyllostachys pubescens (CK) for C, N, P, soluble sugar, Starch, cellulose, lignin, tannin, oxalic acid and phenolic acid content differences. The results showed that the content of C in leaves of Phyllostachys pubescens did not change obviously, and the contents of starch, cellulose and phenolic acid were significantly decreased compared with those without Phyllostachys pubescens forest. In addition to the above indexes, the other indexes of bamboo leaves of 2-3 years old were significantly increased, and the contents of lignin and oxalic acid were significantly increased in one-year-old bamboo leaves. There was no significant change in the content of phenolic acids , P, oxalic acid and lignin content increased significantly, while other indexes decreased significantly. The content of P, sucrose, lignin, oxalic acid and phenolic acid in three-year-old bamboo leaves significantly increased, while other indexes decreased significantly. Lei bamboo leaves C, N, P nutrient balance also had a significant impact. The forest coverage management had a significant effect on the nutritional quality of leaves and the palatability of leaf-eating pests. Among them, the nutritional quality and the content of the defensive substances of leaves of reed rhizome were increased, the palatability of leaf-eating leaf pests decreased, Leaf insect pest damage increased, while the long-term management of the opposite Phyllostachys pubescens, leaf pests may be more likely to induce the occurrence and disaster.