摘要
选用广西马尾松中龄施肥材料(连续观测年),根据国标《木材物理力学试验方法》,研究了施肥 13 对木材密度和干缩率的影响,结果表明:、、三要素中,以、肥对木材密度和干缩率的影响较大。NPK NP ()总的来说肥增加木材密度和干缩率,肥降低木材密度和木材干缩率。、肥降低木材差异干缩。1 P N NP 施肥对木材密度和干缩率的影响规律性不明显。()、、施肥对木材密度和干缩率的影响及其变化程K2NPK 度,与肥种、施肥量、树干部位、木纹方向、气干或全干状态有关。施肥木材密度具有增加的趋势,而且 P 树干下部基本密度方差分析各处理间差异显著。、肥对木材密度的影响,规律性不明显。肥使木材干缩NK P 率增加,肥主要增加的是全干干缩率和径向气干干缩率,特别是树干下部径向气干干缩率各处理间差异显P 著。肥对干缩率的影响规律性不明显,有待进一步研究。()为了保证木材质量,对于纤维用材林,主要K 3施肥;对于结构用材林,可施肥,适当考虑肥,肥施用应慎重。 P P N
Observations during 13 years on effect of different fertilizers applied in middle-aged Pinus massoniana stand in Guangxi province on basic density and shrinkage of its wood showed that N and P fertilizer had greater impact on wood density and shrinkage. Generally speaking, wood density and shrinkage may be increased by P fertilizer while decreased by N fertilizer. Both N and P fertilizer may decrease T/R ratio of wood shrinkage. K fertilizer had no evident effect on wood density and shrinkage. Effect of application of N, P, K fertilizer on wood density and shrinkage and its change had close relation with kind of fertilizer, amount applied, position of the tree, directions of wood grain and air-dry or absolute-dry status. Application of P fertilizer could increase wood density, and the variance analysis of basic density in the lower part demonstrated evident difference among different treatments. N and K fertilizer had no evident effect on wood density. P fertilizer could increase shrinkage, mainly absolute-dry shrinkage and radial air-dry shrinkage, especially significant at the lower part of tree among different treatments. Effect of K fertilizer on wood shrinkage need to be studied. It is suggested P fertilizer using in fiber-wood stand, P fertilizer with some N fertilizer in structure wood stand and K fertilizer using carefully.
出处
《浙江林业科技》
2001年第6期1-5,13,共6页
Journal of Zhejiang Forestry Science and Technology
基金
国家"九五"重点攻关专题"马尾松优质纸浆用材树种良种选育技术及培育技术研究"项目资助(专题编号:96-011-01-01)
2000 ~ 2002 年贵州省科委自然科学基金项目"主要营林措施与马尾松木材性质关系的研究"的部分内容。
关键词
马尾松
施肥
木材密度
干缩率
木材差异干缩
Pinus massoniana
fertilization
wood density
shrinkage
T/R ratio
