By the statistical analysis method, the authors researched the growth model and cutting age of masson pine natural forest with the sample plot inventory data.
根据标准地调查资料，应用统计分析方法研究生长模型，并结合森林经营实际确定采伐年龄。
Under new feeding method of Apis cerana cerana seasonal management, the skill of breeding right age overwintering bee flock and the cutting off offspring by imprisonment should be undertaken.
在新法饲养中蜂季节性管理中，必须采取培育适龄越冬蜂并适时幽王断于的技术措施。
Under new feeding method of Apis cerana cerana seasonal management, the skill of breeding right age overwintering bee flock and the cutting off offspring by imprisonment should be undertaken.
在新法饲养中蜂季节性管理中，必须采取培育适龄越冬蜂并适时幽王断于的技术措施。
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