1) 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。
3) Poplar variety
杨树品种
1.
In the light of the serious damages of Anoplophora nobilis to artificial Poplar forest and comparative selection of 46 introduced varieties, the study eventually selected 6 anti Anoplophora nobilis Poplar varieties, and conducted afforestation test, which provided reliable reference on renewal of Poplar variety in Anoplophora nobilis damaged district of Northwest China.
针对黄斑星天牛对杨树人工林造成的严重危害 ,通过引进 46个品 (系 )的对比筛选 ,最终选择出了陕林 3号等 6个抗天牛杨树品种 ,并在平凉市泾河川区进行了造林示范。
4) Poplar varieties
杨树品种
1.
An attificial cross breeding test was conducted that taking several superior poplar varieties and P.
本研究为适应湖北省杨树产业发展的需要,大量引进杨树品种并通过苗期选择和造林试验对其性状进行了分析:在此基础上利用其中的优良品种与湖北省乡土杨树种小叶杨进行杂交试验,以图选育出具有自主知识产权的杨树新品种,得到如下结果: (1)自1997年起,先后引进杨树品种105个并予以保存,其中用于造林试验的30多个品种已经开花结实,为开展杨树杂交育种工作积累了比较丰富的种质资源。
2.
Cuttings of the three poplar varieties were put in the shade for natural dehydration of 24 h,48 h,and 72 h.
以中黑防、晚花杨、小黑杨14号3个杨树品种为试验材料,设计自然失水24 h、48 h7、2 h三个梯度(处理)研究插穗自身含水量与扦插成活的关系。
3.
We observed the drought resistance and physiological reaction of six poplar varieties by using cuttage seedling.
本文利用扦插苗对6个杨树品种进行抗旱指标与生理反应研究,确定了各品种的土壤含水率范围,对各树种抗旱性进行了定量评价,为杨树新品种推广利用提供科学依据。
5) poplar seeds
杨树种子
1.
To analyse the influence of storage temperature,water content and dry means on resistance to storage properties of poplar seeds we carried this study.
对于杨树种子的贮藏,室内阴干等缓慢脱水的干燥方法较硅胶干燥等快速脱水的方法好,尤以室内阴干1 d为最好。
6) poplar planting area
杨树种植区
补充资料：无种
1.没有种子。 2.犹言绝后代。 3.谓没有血统相传关系。
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