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本文通过田间实验与测试揭示了柞蚕林养分循环状态和干扰因素对养分平衡的影响。结果表明,地下部储存的养分占总积累的比重较大。同时叶部养分向树体转移能力较强。柞蚕林二级生产力是以收获蚕茧为主要形式,其养分输出水平对系统的养分平衡产生的影响主要表现对树体养分内循环方面。林木养分储量的下降是造成生产力衰退的重要原因。对养分循环格局的认识有助于对该系统干扰强度进行调控,以增强柞蚕林生态系统的稳定性。
In this paper, through field experiments and tests, the effects of nutrient cycling status and disturbance factors on nutrient balance were revealed. The results showed that the proportion of nutrients stored in the subsurface accounted for a larger proportion. Leaf nutrients to the tree at the same time more capable of transferring. The secondary productivity of tussah sericulture is the main form of harvesting silkworm cocoon. The effect of nutrient output level on the nutrient balance of the system is mainly reflected in the cycle of the nutrient inside the tree. The declining forest nutrient reserves are the important reasons for the decline of productivity. The understanding of the nutrient cycle pattern helps to regulate the disturbance intensity of the system to enhance the stability of the tussah forest ecosystem.