Oxygen delignification of populus kraft pulp is studied.
进行了杨木硫酸盐浆氧脱木素的研究。
Oxygen delignification of populus kraft pu1p is studied.
进行了杨木硫酸盐浆氧脱木素的研究。
The smooth white trunk of Populus tremuloides, or “Quaking Aspen, ” hides a secret.
这些树干光滑的美洲山杨，或者叫做“颤杨”有着一个秘密。
Meanwhile, the paper introduces Near-Infrared Spectroscopy to the analysis of triploid Populus tomentosa for the first time.
同时，本文首次将近红外光谱技术引入三倍体毛白杨的分析中。
A different poll, conducted by Populus for the pro-smoking group Forest, found that 73% opposed an outright ban; most favoured a compromise of some sort.
另一项由Populus为主张吸烟的组织Forest进行的民意调查发现，73%的人反对直接禁令；多数人赞成一定程度的折衷。
Comparative study on the leaf structure in Populus qiongdaoensis and P. adenopoda.
标题琼岛杨和响叶杨叶结构的比较研究。
Populus cathayana is the main species to plant farmland forest net work in Qinghai province hill .
青杨是青海省营造山地农田林网的主要树种。
Objective The study aimed to learn the population quantity and dynamic of Populus pruinosa in Tarim basin.
目的了解塔里木盆地灰叶胡杨种群的数量及动态。
Describes the symptoms, pathogens and distributions of 9 Leaf spots of Populus hopeiensis in 11 different regions.
本文简要描述了11个地区不同种源的河北杨9种叶斑病的症状、病原、分布和感病情况。
There were no detailed studies on litter and forest floor of Populus davidiana and Fraxinus mandshurica in this region.
针对帽儿山林区的水曲柳、山杨两种主要林分类型凋落物以及林下凋落物层进行细致的研究较少。
Meanwhile, the paper introduces Near Infrared Spectroscopy to the analysis of triploid Populus tomentosa for the first time.
同时，首次将近红外光谱分析技术应用到三倍体毛白杨的材性分析中来。
The development of thin high-density fiberboard which made of mix material Populus and Pinus massonia was studied in the paper.
研制以意杨、马尾松混合材为原料生产地板用薄型高密度纤维板。
Thirdly, the relationship between the content of flavonoids of Populus Canadensis Moench. leaves and other relevant components was investigated.
探讨了加杨叶中天然产物黄酮类化合物含量变化与其他相关成分的关系。
The experiment reveals that the low salinity and the sufficient water supply are the most important for the survival of seedlings of Populus euphratica.
实验结果显示，早期的低盐和充分的水分条件是胡杨幼苗存活的关键。
Regeneration system of Populus Sankang has been established from leaf explants, which laid the foundation for the establishment of genetic transformation system.
以三抗杨为试材，建立了三抗杨叶片外植体高效再生系统，为三抗杨遗传转化体系的建立奠定了良好的基础。
Based on the characteristic of Populus Trichocarpa CV. "Southern" planted in Dengting Hu area, a plywood manufacture technology was worked out, optimized and tested.
介绍了洞庭湖区引种的黑杨派南方型杨木的特性，根据原料特性设计了胶合板制造工艺并对工艺参数进行优选。
A study was conducted on the effect of different concentration of NAA treatments on the cutting propagation of triploid Populus tomentosa testtube plantlet cuttings.
研究了不同浓度NAA处理对三倍体毛白杨试管苗切段扦插繁殖的影响。
After many-year experiments, the result show that bud forcing treatment can increase the survival ratio of Populus bolleana with cuttage by hard branch up to 80%-95%.
经过多年试验表明，采取对插穗进行催芽处理等一系列育苗技术措施，可使新疆杨硬枝扦插成活率提高到80%-95%。
The objectives of this study were to investigate the effect of insect and soil water contents on phenolic compounds and nitrogen concentrations in leaves of Populus euphratica.
研究了不同土壤水分条件下虫害胁迫对胡杨叶片中酚类物质含量及氮含量的影响。
In this research, random screening of 10 SSR primers from Populus and Salix, respectively, and the genetic relationship among 17 poplar cultivars and 20 willow cultivars were studied.
利用SSR引物的种间通用性，本研究分别从杨属和柳属中各随机筛选出10对SSR引物，对17个杨树品种和20个柳树品种的遗传关系进行了分析。
Wood basic density and fiber morphological features in the breast-height position for512-year-old excellent clones of Populus tomentosa Carr. (1CK)were measured and analyzed in this paper.
对12年生5个毛白杨优良无性系（另1个作对照）胸高处木材的基本密度和纤维形态进行了测定分析。
Disease resistance of the seedlings of 59 introduced Populus nigra clones seedlings infected with Marssonina brunnea and Alternaria tenuis were investigated by applying statistical analysis.
对引进的59个欧洲黑杨无性系苗木感染黑斑病和叶枯病进行了调查，应用统计分析的方法对这些无性系抗病性进行了分析。
Some results as follows, 1. Chromosome preparation for laser micro-dissection system was solved, which indicated that laser micro-dissection of PMCs meiotic chromosomes in Populus was feasible.
解决了激光显微分离系统染色体样本制备的难题，使杨树花粉母细胞减数分裂染色体激光显微分离成为可能。
The result also show that:mycorrhiza' s promotion to Populus ussuriensis seedlings ' growth is directly related to the improvement of inoculated seedlings' chlorophyll content and enzyme activity.
结果还表明，菌根的促生长效应与菌根化苗木的叶绿素含量的增加及过氧化氢酶活性的提高呈正相关。
The result also show that:mycorrhiza' s promotion to Populus ussuriensis seedlings ' growth is directly related to the improvement of inoculated seedlings' chlorophyll content and enzyme activity.
结果还表明，菌根的促生长效应与菌根化苗木的叶绿素含量的增加及过氧化氢酶活性的提高呈正相关。
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