Genetic improvement is also a means to improve forest productivity, for example to ensure a high wood production in intensively managed forests.
基因改良亦是提高森林生产力的一种手段，例如确保集约管理的森林提供高木材产量。
Artifical improvement of soil fertility in a regraded forest ecosystem by using municipal sewage sludge.
城市污泥对退化森林生态系统土壤的人工熟化研究。
The collective unconscious, which is included in forest thought, influences the improvement of national character.
森林思想所蕴含着的集体无意识，影响着民族性格的改进和完善。
The rate of coverage of forest have an evident effect on many environment factors such as soil and water reservation ecological environment improvement.
森林覆被率在保持水土、涵养水源、改善生态环境方面起着很大作用。
Grasping the concept and constructive characteristics of the forest city correctly makes a great significance for the promotion and improvement of the forest city's constructive levels in our country.
正确把握森林城市理念与建设特点，对于促进和提高我国森林城市建设水平具有重要意义。
The article sets forth several factors that may curb the improvement of female cadres' quality in forest farms directly subordinate to Guangxi Autonomous Region, and proposes certain solutions.
文章提出制约广西区直林场女干部素质提高的几个因素，并提出一些解决途径。
Problems existing in the transportation on logging roads in Yichun forest areas are described with the causes of road accidents analysed and specific measures for improvement presented.
简要地介绍了伊春林区公路运输中存在的问题，分析了交通事故的原因，提出了具体整改措施。
In the stage of the biological reclamation, I have studied the soil improvement method, the planted forest technology and the farming and forestry multiplexed system.
而生物复垦阶段则研究了覆土改良方法、人工林技术和农林复合系统。
The effects of the sandbreak forest system in Yulin sandy area on the sandbreak, soil improvement and natural vegetation recovery were studied by investigating their configuring structure and species.
通过对陕北榆林风沙区防风固沙林体系的配置结构、树种组成、防风固沙效益、改良土壤的作用以及对天然植被的影响等的调查、观测和分析，结果表明：其配置结构较为合理，生态效益较为显著。
Interspecific hybridization has been a technique of forest tree improvement and has been commonly practiced in many tree species, but there have been few attempts on China fir species.
杂交育种技术已在众多树种的遗传改良中被广泛应用，但在开展过的冷杉杂交试验中，几乎没有涉及到我国的冷杉树种。
Interspecific hybridization has been a technique of forest tree improvement and has been commonly practiced in many tree species, but there have been few attempts on China fir species.
杂交育种技术已在众多树种的遗传改良中被广泛应用，但在开展过的冷杉杂交试验中，几乎没有涉及到我国的冷杉树种。
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