1) native Populus
天然杨树种群
2) natural population
天然种群
1.
Study on pollination characteristics of natural population of Pinus koraiensis;
红松天然种群风媒传粉特点的研究
2.
Establishment of a natural population during the ex situ conservation of Taxus chinensis;
红豆杉迁地保护中天然种群的形成
3.
Studies on natural population distribution of Keteleeria cyclolepis in Fujian Province;
福建江南油杉天然种群分布规律研究
3) tree species in natural forests
天然林树种
6) 25 species of poplar
25种杨树
1.
Investigating of comparing and assessing forest of 14-year-old poplar, degree of 25 species of poplar infected by Valsa sordida were divided into 5 grade .
通过对14年生杨树评比林的调查,将25种杨树的烂皮病发生程度分成5级,其中Ⅴ级最重,从而明确了各杨树品种感发烂皮病的程度,筛选出71107、742407、银中杨、DN113等为不易感发烂皮病的杨树品种。
补充资料：种群增长率(见种群出生率)
种群增长率(见种群出生率)
种群增长率见种群出生率。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条