FERTILIZATION STUDIES IN BAMBOO STANDS WITH DIFFERENT END USES I.FOR BAMBOO TIMBER STAND

Totally 40 plots have been laid out at three experiment sites located in the main Phyllostachys pubescent production area of China, where the productivity of plot before treated is obtained through uniformity trial, based on which the proper plot area is determined as 400m2.According to the orthogonal design, three factors with two levels for each, i.e.A.fertilizer dosage (375 kg·ha-1, 750kg·ha-1);B.fertilizer applying time (Spring:one month before shooting, Autumn:shoot/bud differentiation stage);C.fertilization method (in furrow, in stump), have been combined for searching the best combination.In all sites, N P K Si compound commercial fertilizer is adopted, the propotion of which is N:P:K:Si=2:1:0.5:0.5.The results have shown that the best one is in spring, one month before shooting, to apply 375 kg·ha-1 in furrow with a depth of 20cm, which can increase culm yield by 7282.50kg or a net income of RMB 832.20 Yuan compared with the control.