金沙江构树不同规格整地造林生长分析  

Growth Analysis of Site-preparation Afforestation with Different Specifications of Broussonetia papyrifera in Jinsha River

作　　者：张鹏[1,2] 廖声熙[1] 崔凯[1] 袁首乾[1] 李立[1] 

机构地区：[1]中国林业科学研究院资源昆虫研究所,云南昆明650233 [2]云南省农业科学院质量标准与检测技术研究所,云南昆明650205

出　　处：《西南农业学报》2014年第5期2173-2178,共6页Southwest China Journal of Agricultural Sciences

基　　金：林业科学技术推广项目[2012]29号;国家自然科学基金(30972383)

摘　　要：为研究金沙江流域红皮构树品种的生长规律和探索适宜的构树造林方法,比较了3种不同规格整地造林的生长差异,分析了7年生构树的各项生长指标.结果表明,红皮构树在3种不同规格整地条件下生长差异不显著（P＞0.05）,因此,在短周期培育中应采用小规格定植穴造林,可降低生产成本,提高生产效率;红皮构树生长呈现出“慢-快-慢”的生长规律,可划分为生长初期、速生期、生长后期3个阶段,根据其树皮纤维3～5年生时质量最优,且砍伐后树桩能快速萌发新技,短周期内能连续收获的特点,确定3～5年为构树短周期培育年限,此时砍伐利用可获取较高的年收益率;获得了红构高生长、地径、冠幅的拟合方程,可作为金沙江流域上段红皮构树的生长趋势预测方程;金沙江红皮构树品种生长快,树干高大通直,构皮纤维含量高,可推荐为构树优良品种.In order to study the growth regularity and find the suitable planting method for d bark B.papyrifa in Jinsha river,the growth difference with different specifications of site-preparation afforestation was compared and some growth indexes of 7-years old red bark B.papyrifera were analyzed in dry and hot valley of Jinsha river.The results showed that the growth index d red bark B.papyrifem had no significant difference in different site-preparation specifications.Thus,it was recommend of using small specification of planting hole,which could save cost and improve production efficiency.Red bark B.papyrifera showed a ‘ slow-fast-slow＇ growth law,and the whole grnwth stage could be divided into three stages：initial stage,fast-growing period and final stage.Given that 3-5 years old bark fiber with the best quality,and that the felled stumps could quickly sprouted and was continuously harvested in a short term and so on,it was identified that 3-5 years old should be as age limit of short cycle cultivation to obtain high annual profit,on which farmer could obtain a relativdy higher annual yield.The regression equation of height growth,basal diameter and breadth were obtained,which can predict the growth and yidd.Red bark B.papyrifera in Jinsha dver grow fast,and have tall and straight trunk.Its bark contaim high fiber content.So,it can be used as excellent tree species.

关 键 词：金沙江 红皮构树 整地 生长 品种 

分 类 号：S792.99[农业科学—林木遗传育种]