Abstract:

How to determine the reasonable amount of bamboo shoot dug in a certain bamboo stand is a key problem in the high-yield management of Phyllostachys pubescens. Using the data obtained from 50 plots of Phyllostachys pubescens, the predictive models of bamboo shoot yield and mean D.B.H were built in this paper. Based on the two models, the method of economic threshold was introduced into the research field of bamboo, the new concept of economic threshold of Phyllostachys pubescens ecosystem was put forward, and the economic threshold model of Phyllostachys pubescens ecosystem was founded as follows: M×P sh k∑T-1i 1Δy-ie -iδ+Δy-Te -TδP-{sh}+RMW sh+R(1-k)W sh∑T-s+1i 1Δy-ie -(I+s)δ]P-b +R(1-k)W- sh∑T-1i T-sΔy-ie -TδP-b-F-0∑Ti 1e -iδ. Therefore, this paper not only enriched and developed the research content and application, field of economic threshold, but also provided a scientific basis for the management of Phyllostachys pubescens, and would contribute to realizing its goal of sustainable development and high yield. P-b +R(1-k)W- sh∑T-1i T-sΔy-ie -TδP-b-F-0∑Ti 1e -iδ. Therefore, this paper not only enriched and developed the research content and application, field of economic threshold, but also provided a scientific basis for the management of Phyllostachys pubescens, and would contribute to realizing its goal of sustainable development and high yield.

Key words: Phyllostachys pubescens, Ecosystem, Economic threshold