不同修枝强度及配方施肥对红锥幼林生长的影响

Effects of Different Pruning Intensities and Formula Fertilization on Growth of Castanopsis hystrix Young Forests

探讨不同配方施肥及修枝强度对红锥(Castanopsis hystrix)幼林生长的影响,为红锥培育提供技术支撑,以3.7年生红锥幼林为研究对象,采用单因素随机区组试验设计,开展配方施肥及修枝试验。结果表明,相同施肥处理下,不同修枝强度对树高1年和2年生长量均影响不显著;1/3修枝高度可在第1年促进胸径生长,1/2修枝高度不能促进胸径生长;不同修枝强度对胸径生长的影响在第2年开始减弱。相同修枝强度下,不同施肥处理对树高、胸径和材积1年生长量均影响不显著;施肥2年后,不同施肥处理对树高、胸径和材积生长量均影响显著,配方肥1(N∶P_(2)O_(5)∶K_(2)O=14∶8∶8)效果最好。处理3(1/3修枝高度和配方肥1(N∶P_(2)O_(5)∶K_(2)O=14∶8∶8))和处理6(1/3修枝高度和配方肥2(N∶P_(2)O_(5)∶K_(2)O=12∶10∶8))在第1年效果较好,处理3在第2年效果最佳,处理3对红锥2年累积生长效果最佳。

In order to explore effects of different formula fertilization and pruning intensities on growth of Cas⁃tanopsis hystrix young forests and provide technical support for cultivation of C.hystrix,formula fertilization and pruning experiments were carried out by single factor randomized block experiment design in 3.7-year-old C.hystrix forests.Results showed that under the same fertilization condition,different pruning intensities had no significant effects on tree height growths in one year and two years.1/3 pruning height could promote DBH growth,and 1/2 pruning height could not promote DBH growth in one year.Influences of different pruning inten⁃sities on DBH growth began to decrease in the second year.In the same pruning intensity,different fertilization treatments had no significant effects on tree height,DBH and volume growths in one year,and there were signif⁃icant differences in tree height,DBH and volume growths among different fertilization treatments in two years,and formula 1(N∶P_(2)O_(5)∶K_(2)O=14∶8∶8)was the best.Under interaction of pruning and fertilization,treatment 3(1/3 pruning height and formula 1(N∶P_(2)O_(5)∶K_(2)O=14∶8∶8))and treatment 6(1/3 pruning height and formula 2(N∶P_(2)O_(5)∶K_(2)O=12∶10∶8))had better effects on C.hystrix growth in the first year.Treatment 3 had the best ef⁃fect in the second year.Ttreatment 3 had the best effect on cumulative growths of C.hystrix for two years.