不同用途毛竹林的施肥研究 Ⅱ.毛竹笋用林丰产经营技术

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

为探索高产稳产毛竹笋用林经营技术,以研究施肥方法为主,利用正交设计原理,布置了一个具有2次重复,4因子3水平(A.毛竹林密度,B.挖山深度,C.施肥剂量,D.施肥时间与次数)的试验,设计中加设无处理措施的对照小区,以增加试验结果的可靠性。 连续5年分别统计10种处理的春笋产量,并对数据进行正交设计的直观分析和时间裂区设计的方差分析。结果表明,处理2(A_1B_2C_2D_2)、处理4(A_2B_2C_2D_3)和处理5(A_2B_2C_3D_1)为试验中的三种最佳处理组合,于正常年景可比对照增产近10倍。据综合分析的结果,建议在我国亚热带中、北部山地毛竹笋用林中推行中等水平(A_2B_2C_2D_2)的经营方式。采用该套技术经营的毛竹笋用林,每度(二年)每公顷林地可以增产春笋2万kg左右,除去经营成本可增收0.7万元。

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 (A2B2 C2D3) 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).