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短期竹-菌套作对竹林生态的影响

Effect of Short-term Bamboo-edible fungi Intercropping on the Ecology of Bamboo Stands

  • 摘要: 竹下套种食用菌多被报道具有可观的经济效益,但对竹林和土壤生态的影响如何缺乏研究和评估。在叙永县邬高林下种植产业园内不同类型(散生、丛生和混生竹)竹林下分别进行了食用菌(大球盖菇Stropharia rugosannulata和竹荪Dictyophora indusiata)套作,观测了套作前后竹林立竹胸径、竹笋品质以及土壤酸碱度、有机质、主要养分元素以及竹篼木质素、纤维素含量的变化。结果表明:食用菌套作能够促进竹株生长,有利于竹笋内游离氨基酸、可溶性蛋白和维生素C的积累,总体上土壤pH值和速效钾含量升高,铵态氮含量降低或变化不明显,硝态氮含量升高(铵态氮/硝态氮比值降低),有效磷含量仅在丛生竹林内显著降低,而全量养分和有机质含量几乎无显著变化。种植食用菌(竹荪)后,竹篼内木质素和纤维素降解稍快。本研究可为竹-菌复合模式的生态效应评价及科学经营管理提供基础数据。

     

    Abstract: Bamboo-edible fungi intercropping has been widely reported to have significant economic benefits, but its effect on the ecology of bamboo forest and soil ecology is lack of research and evaluation. The edible fungi (Stropharia rugosannulata and Dictyophora indusiata) were intercropped under different types of bamboo forests (scattered, clustered and mixed bamboos) in the planting industrial park of Wugao Forest in Xuyong county. The changes of diameter at breast height, bamboo shoot quality, soil pH, soil organic matter, main nutrients, lignin and cellulose content of bamboo strips were determined and compared before and after intercropping. The results showed that the intercropping of edible fungi could promote bamboo growth, and facilitate the accumulation of free amino acids, soluble proteins and vitamin C in bamboo shoots. After intercropping, soil pH value and the available K content both increased, while the ammonium nitrogen content showed negligible variation or decreased to some extent. Meanwhile the nitrate nitrogen content increased, and the ratio of ammonium nitrogen to nitrate nitrogen decreased. The available P content only decreased significantly in the clustered bamboo forest, while the total N, P, K and organic matter content had almost no significant change. After planting the edible fungi (Dictyophora indusiata), lignin and cellulose in bamboo stump degraded slightly faster. The present study can provide basic data for the evaluation of ecological effects and scientific management of bamoo-edible fungi intercropping model.

     

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