施肥对湿地松幼林生长和木材物理力学性质的影响  

EFFECTS OF FERTILIZATION ON GROWTH INCREMENTS AND WOOD PHYSICAL-MECHANICAL PROPERTIES OF YOUNG SLASH PINE

作　　者：徐有明[1] 林汉[1] 李贻铨[2] 洪院生 华乔贵 

机构地区：[1]华中农业大学林学系,武汉430070 [2]中国林业科学研究院林业研究所,北京100091 [3]江西省枫树山林场,景德镇333000

出　　处：《林业科学》2002年第4期125-133,共9页Scientia Silvae Sinicae

基　　金：国家自然科学基金项目 (3 9870 63 8);国家"十五"攻关课题"红壤带北部低丘岗区农林复合发展模式与技术研究"(2 0 0 1BA5 0 8B13 )的部分内容

摘　　要：研究了黄红壤立地上湿地松幼林施肥种类、施肥量及施肥配比对生长量、木材物理力学性质的影响 ,结果表明 :(1)施用N肥对湿地松生长有显著的抑制作用 ,K肥处理材积明显下降 ,P肥和P肥与N、K配比施肥及N、P、K配比施肥显著地促进湿地松胸径、树高、材积的生长 ;(2 )施肥处理对木材弦向干缩率、径向干缩率、纵向干缩率、体积干缩率、差异干缩 5个气干干缩性状的影响没有达到差异显著的水平 ,但单施P肥、NP配比施肥使木材差异干缩、纵向干缩率明显减小 ,单施K肥、单施N肥使木材纵向干缩率增大 ;(3)单施P肥或P肥与N、K配比施肥及单施一定量的K肥能明显提高湿地松木材晚材率、基本密度、顺纹抗压强度、抗弯弹性模量 ,且P肥量与材性提高量成正比 ,而N肥处理显著降低了木材性质 ;(4)施肥处理对生长量与木材性质间相关性的影响因施肥种类而异 ,树高、胸径、材积因子与顺纹抗压强度、抗弯弹性模量、抗弯强度基本上呈正相关 ;晚材率、木材密度与顺纹抗压强度、抗弯弹性模量、抗弯强度呈正相关 ;(5 )林分内优势木木材物理力学性质明显优于中庸木 。The trial stand of 2?m×2?m spacing for slash pine was founded on yellow red soil in 1991.Eleven sorts of fertilization treatments were designed in forms of randomized blocks in this trial.Fertilizes of nitrogen (N),potassium (K) and phosphorous (P) were successively done in this stand in 1992 and 1994.Effects of fertilization on tree growth increments and wood physical mechanic properties of young slash pine were studied in March of 1998.Variance analyses showed that there were significant effects of fertilization on tree growth of slash pine and latewood percent,wood basic density and compression parallel to the grain of wood (CP),modulus of elasticity (MOE) and modulus of rupture (MOR) for slash pine.Nitrogen fertilize made trees in the stand grow slowly and had a distinct negative effects on tree growth of slash pine.Volume of trees fertilized with K was smaller than that of unfertilized trees.Fertilize of P,fertilizes of P combined with N or K and Combined fertilizes of N P K were very clearly helpful to increase tree growth of slash pine.Significant differences in shrinkage percent of tangential,radial,axial (AL),volume of wood at air dried condition and ratio (T/R) of tangential to radial shrinkage were not found among eleven treatments at 0 05 level.But the AL and T/R of wood from trees fertilized with P,N P were smaller than those from unfertilized trees and AL of wood from trees treated with only nitrogenous or potash fertilizer were than that unfertilized trees.P fertilizer,N P fertilizers,N K fertilizer and combined fertilizers of N P K enhanced distinctly latewood percent,basic density,CP,MOR and MOE compared with the physical mechanical properties of wood from unfertilized trees in trail stand of slash pine.Increasing percents of wood properties above were positively correlated with the amount of P fertilizer treated per hm 2. Growth increments of tree height,diameter at breast height and tree volume in stands treated with fertilizers were positively related with latewood percent,wood

关 键 词：湿地松 施肥 生长量 木材物理力学性质 相关分析 

分 类 号：S791.246[农业科学—林木遗传育种]