毛竹伐桩储水灌溉技术在干旱年份的防灾效果研究

Study on Drought Control Effects of Moso Bamboo Stump Storage Irrigation Techniques in Drought Years

本文对毛竹伐桩储水灌溉技术在干旱年份的防灾效果进行研究。结果表明,(1)毛竹伐桩储水灌溉技术在干旱年份的防灾、增效效果明显,其中2700 L/hm^(2)灌水量(处理1)竹笋产量5404 kg/hm^(2),新竹平均胸径9.41 cm,综合盈利-5475元/hm^(2);5400 L/hm^(2)灌水量(处理2)竹笋产量7916 kg/hm^(2),新竹平均胸径9.68 cm,综合盈利780元/hm^(2),均明显优于对照。(2)不同处理间毛竹出笋量的差异达0.01显著水平;在平均胸径方面,处理1与对照、处理1与处理2达0.05显著水平,处理2与对照达0.01显著水平。此措施初始投入不大,技术简单易行,适用于水源受限竹林的间歇性干旱和小面积零星分布的笋用林和笋材两用林培育,值得推广应用,为此提出了该技术的适用范围和注意事项,以期为竹林经营者在选用竹林防旱技术时提供参考。

In this paper,a study was made on the drought control effects of moso bamboo stump storage irrigation techniques in drought years.The results showed that:1.Significant effects were achieved in drought control and efficiency improvement in drought years using moso bamboo stump storage irrigation techniques,of which the bamboo shoot yield of 5404 kg/hm^(2),young bamboo mean DBH of 9.41 cm and comprehensive profit rate of-5475 yuan/hm^(2)were reached with the irrigation amount of 2700 L/hm^(2)(Treatment 1);the bamboo shoot yield of 7916 kg/hm^(2),young bamboo mean DBH of 9.68 cm and comprehensive profit rate of 780 yuan/hm^(2)were reached with the irrigation amount of 5400 L/hm^(2)(Treatment 2),significantly higher than those of the control.2.The difference index of bamboo shoot yield among different treatments reached the significant level of 0.01;the difference index of the mean DBH between Treatment 1 and control and between Treatments 1 and 2 both reached the significant level of 0.05 and that between Treatment 2 and control reached the significant level of 0.01.The measure,simple and practical with low initial input,is suitable for bamboo forests with intermittent drought and those small-sized and scattered shoot-oriented and shoot-wood dual-purpose bamboo forests and worth promoting.The range of application and cautions of the techniques were put forward here to provide bamboo growers with reference in choosing drought control techniques.