摘要
采用生物数学方法，研究了柚木育苗密度与小棒槌苗的生长、棒槌状主根段的形成、单位面积苗木产量与质量等关系。用指数函数、幂函数、对数函数等１０种曲线方程，建立了３５个数学模型以描述其复杂的关系。经分析揭示出：（１）在一定的育苗密度下，土壤肥力较高的尖峰点，苗木地上、地下部分生长与产苗量远不如土壤肥力低的广州点，其差距随密度的增大而增大，主因是点间水热协调性质与日照长短的差异所致；（２）依不同地点生态因素的差异来调控育苗密度，以提高苗木产量和质量远比在同一地点延长育苗时间更为有效；（３）调控好育苗的最适密度，就可取得最好的苗木产量与质量。尖峰点和广州点适宜的育苗密度分别为１００～２００株／ｍ２与３００～４００株／ｍ２。两地相差约３～４个密度级（５０株／ｍ２为Ⅰ级）。
The relationship between teak seedling
density and stump growth,formationof main root,seedling yield per unit area and seedling
quality are studied through adoptingbiomathematics method.35 mathematic models are
established using 10 curve equations i.e.exponential function,power function,logarithmic
function etc.. The results show that :1. The seedling growth above and under the ground in
Jiangfeng good site are far inferior to the growth in Guangzhou poor site at the same seedling
density.The difference between them will be increased as density increases. THis is why there
are differences between two sites insunshine/day and coordination of water and hot.2.Adjusting
seedling density on the basis ofdifferent ecological condition in different sites is more effective
than prolonging the time ofbreeding seedlings in one site to increase seedling yield and
quality.3.The suitable seedlingdensity in Jiangfeng and Guangzhou are 100～200 and 300～
400 seedlings per square meterrespectively. There are four density classes(50 seedlings per
square meter is taken as oneclass).The best seedling quality and yield could be got by
adjusting the seedling density tothe most suitable condition.
出处
《林业科学研究》
CSCD
北大核心
1995年第4期351-359,共9页
Forest Research
基金
"七五"攻关项目"柚木种源选择研究"课题
关键词
柚木
育苗
密度
苗木
产量
质量
teak stump,seedling
density,seedling yield
