摘要
用数理统计方法，对桑园的经济寿命进行量化，以桑园年产叶量和年均产叶量为指标，建立了数学模型，为合理利用桑园资源提供了理论依据。
Using the method of mathematical statistics,economic life span of mulberry orchards was quantitatively studied.Mathematical models were established taking yearly leaf production and annual average leaf production as the indices.This study provided the theoretical basis for reasonable utilization of mulberry orchard resources.
出处
《河北林果研究》
1998年第2期148-151,共4页
Hebei Journal of Forestry and Orchard Research
关键词
桑园
产叶量
更新期
数学模型
mulberry orchard
mathematical model
regeneration time
