针叶树种 meaning in English

coniferous species

Curtilage plant diversity at the household level in shuangqiao village
4种针叶树种引种试验
Research on photosynthesis characteristics of hippophae rhamnoides
两种针叶树种光合特性研究
With many efforts , the scientists of china have succeeded in researching the plant rapid propagation of many kinds , yet only about ten kinds of economic plants have been industrialized and spread over an extensive area , though in a low speed
而针叶树种有许多植物品种进行组织培养难度很大，基本上不能大规模生产。常规拖插又存在著生根慢、成活率低。致使这些品种的苗木一直在用用种子繁殖，后代性状变异非常大。