杨树人工林冻裂率为60%以上。
杨树皱叶病是在黑龙江省杨树人工林中新发现的病害。
Poplar crinkle disease is a new discovered in artificial poplar forest in Heilongjiang province.
本文报道了施肥4年对杨树人工林土壤养分的消长、水分物理特性及土壤微生物的影响。
This paper deal with the effect of fertilization for 4 years on the changes of the soil nutrients, the soil water physical characters and the soil microbes in the poplar plantation.
应用推荐