Fertilization Studies in Bamboo Stands with Different End Uses II. High Yield Management Method for Bamboo Shoot Stands

This experiment is designed for probing bumper and steady yield management technique for bamboo shoot stands of Phyllostachys pubescens. The main object of the research is fertilization method. An orthogonal experimental design, with two replicates is adopted, where there are four factors with three levels for each i. e. (1) density of Ph. pubescens stands; (2) loosening depth; (3)dosage of fertilizer;(4) time and frequency of fertilization. For increasing the reliability of experimental results, CK plots, which are not given any fertilization treatment, are added.The spring bamboo shoot yields of ten treatments have been monitored continuously for five years and the data is analysed with objective analysis for orthogonal design and variance analysis for time split design respectively. The results show that the treatment No.2 (A1B2C2D2), No.4 (A2B2C2D3) and No.5 (A2B2C3D1) are the best matchs in the experiment, which can increase the yield about ten times in normal years. But the middle level management method (A2B2C2D2) is recommended in mountain area of middle and north subtropic region for bamboo shoot stands of Ph. pubescens, according to the results of comprehensive analysis. If this management method is adopted, the spring bamboo shoot yield can increase for about 20 tons·ha-1 every two years and can increase profit for 7000 Chinese Yuan (RMB).