种植园可有不同类型的管理系统(如集约型，半集约型)和使用不同类型的遗传材料(如野生材料，基因改良树种)。
Plantations can have different types of management systems e.g. intensive, semi-intensive and use different types of genetic material e.g.
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。
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.
许多研究都致力于对造纸树种进行基因改良来改进脱木质素工艺。
Research efforts have been directed towards genetically modifying commercially important tree species to improve the delignification process.
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.
我国有大量的盐碱地无法利用，选用适宜的盐生植物，特别是耐盐树种是改良和利用盐碱地的最切实可行的方法。
A large number of alkaline soils can not be used in China. It is a feasible method that selecting proper halophytic vegetation especially salt-enduring species to ameliorate and utilize alkaline soil.
我国有大量的盐碱地无法利用，选用适宜的盐生植物，特别是耐盐树种是改良和利用盐碱地的最切实可行的方法。
A large number of alkaline soils can not be used in China. It is a feasible method that selecting proper halophytic vegetation especially salt-enduring species to ameliorate and utilize alkaline soil.
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