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。
Mix MEM cultivation liquid with different serum concentration of the contents (2%?4%?6%?8%?10%),By means of culture every experiment groups of SP2/0 cell measured cell max multiplication concentration and doubling time and the rate of clone,So as to bovine serum of the plucks blood age length decided.
本试验用生物工程与技术实验室提供的不同年龄段采取的牛血清,配成含不同血清浓度(2%、4%、6%、8%、10%)的MEM培养液,通过培养SP2/0细胞测定各试验组细胞的最大增殖浓度、倍增时间和克隆率,用以对牛血清采血年龄段的判定 结果显示,不同年龄段的牛血清对SP2/0细胞的促细胞生长效应试验存在差异性 在同一血清浓度下,随着牛采血年龄段的增长,其细胞的最大增殖浓度降低,倍增时间延长,克隆率下降 因此,用该试验方法推断牛血清采血年龄段是可行
Study on Regeneration cutting Age of Shelter belt in Nongan County,Jilin Province
吉林省农安县农田防护林更新采伐年龄的研究
Study on the Comprehensive Decision of Yielding Age of Short Rotation Timber Plantation
短周期人工用材林合理采伐年龄综合决策的研究
Growth model and cutting age of masson pine natural forest in Zhejiang
浙江省马尾松天然林生长模型及采伐年龄的确定
A STUDY ON PRINCIPAL FELLING AGE OF POPLAR PLANTATION ON CHANGJIANG RIVER BEACH
长江滩地杨树人工林主伐年龄的研究
The final cutting age of different density poplar plantation in beach
滩地不同密度杨树人工林主伐年龄的研究
Article 33 The authorities in charge of examining and issuing cutting licenses shall not issue the cutting licenses in excess of the annual cutting quota.
第三十三条 审核发放采伐许可证的部门，不得超过批准的年采伐限额发放采伐许可证。
The authorities in charge of examining and issuing cutting licenses shall not issue the cutting licenses in excess of the annual cutting quota.
审核发放采伐许可证的部门,不得超过批准的年采伐限额发放采伐许可证
Since the 1980s, China has exercised cutting quotas in natural forests.
从80年代开始对天然林限额采伐。
Clear cutting shall be put under strict controls and the reforestation shall be completed in the same or next year of the cutting;
皆伐应当严格控制,并在采伐的当年或者次年内完成更新造林;
Kids from parturition to 180 days of age were divided into ten age groups, each consisted of three male and three female kids.
采用初生至180日龄的羔羊,分十个年龄组.
The annual timber production plan shall not exceed the approved annual cutting quota.
年度木材生产计划不得超过批准的年采伐限额。
A Study on the Analysis Determination of the Rational Annual cut of Forest in Shuangyashan Forestry bureau;
双鸭山林业局可采伐利用森林资源年伐量的确定
This valley was lumbered hard, during the past decade.
在过去十年里,这个山谷的林木被大肆采伐。
Assessment on the Results of the Implementation of the Harvesting Quota Policy in 2006;
2006年国家森林采伐限额政策执行情况评价
On the adjustment of the annual logging operations related to the issue of time
对调整年度采伐作业时间有关问题的探讨
Effect of lovastatin on hemodynamic changes in early stage patients with age-related macular degeneration
洛伐他汀与早期年龄相关性黄斑变性患者眼血流关系的临床研究
Chapter Five Forest Cutting
第五章 森林采伐
Discussion of Juvenile Athletic Competition Grouped in Bone-Age
青少年运动员采用骨龄分组竞赛的探讨