1)Poplar leaves杨树叶
1.According to the characteristics of Beijing natural and economical background , many poplar leaves in 21 sites are collected and seven elements: Cu, Zn, Pb, Cd, S, Cr, Ni are detected by ICP.利用植物监测手段对北京城、郊区主要交通干道进行了重金属及硫元素污染状况的研究 ,结合北京自然、经济背景的特点 ,在 2 1个采样点采集了大量杨树叶 ,用ICP AES仪测定了树叶中Cu ,Zn ,Pb ,Cd ,S ,Cr,Ni等 7种元素的质量分数 ,从空间及季节的变化分析研究了大气污染状况 。
2.Three roughage forages of Caragana, Solsola and poplar leaves were used to study their feeding values for goat raising in none-grazing pen-feeding period.)、杨树叶等非常规粗饲料进行了系统的饲用研究。
3.In the paper,Organic inhibitive groups from poplar leaves are picked-up by direct soaking means,and the most components of the corrosion inhibitor in acid pickling solution are used.文章采用盐酸直接浸泡方法从杨树叶中提取有机缓蚀组分,通过失重法研究了浸泡用酸浓度、温度等因素对其缓蚀效率的影响,并与其它添加剂复配。
英文短句/例句
1.The poplar leaves rustled in the wind.杨树叶子被风吹得刷刷响。
2.The leaves of the poplar trees rustled in the wind.风吹着白杨树叶沙沙地响。
3.A Study for Isolation of Populus Chloroplast and cpDNA;杨树叶绿体分离及叶绿体DNA提取方法的研究
4.Proteomic Analysis of Differentially Expressed Proteins in Poplar Leaves Induced by Marssonina Brunnea f.sp. Multigermtubi;杨盘二孢菌侵染后杨树叶片差异表达蛋白质的鉴定
5.Feeding Study on Roughage Forages of Caragana, Salsola and Poplar Leaves;非常规粗饲料柠条、猪毛菜、杨树叶的饲用研究
6.The Ultrastructural Changes of Poplar Leaf Cells after Black Spot Pathogen Infection黑斑病菌侵染后杨树叶片细胞超微结构的变化
7.Expression Analysis of Two Key Enzymes in Poplar Leaves after Pathogen Infection病原侵染后杨树叶片中两个关键酶的表达分析
8.The Effect of the Suddenly-decreased Temperature on Content of Total Phenols and Lignin in Leaves of Poplars气温骤降对杨树叶片总酚、木质素含量的影响
9.Relationship between Accumulation of Na~+ in Leaves and Salt Tolerance of Different Populus Genotypes杨树叶中Na~+的积累与其耐盐能力的关系
10.Responses of Phenolic Compounds in Poplar Leaves to Abrupt Temperature Decrease in Autumn杨树叶片酚类物质对秋季温度骤降的响应
11.Native Auxiliary Species of Mixed Broadleaf-Korean Pine Stands--Populus ussuriensis Kom.阔叶红松林的伴生乡土杨树——大青杨
12.The Resisttance of Poplar Varieties to Melamposora Larici-Populina Kleb杨树对落叶松—杨栅锈菌的抗性研究
13.Research on the Relation between Active Iron in Leaves and Yellow-leaf Disease in Poplar Tree叶片活性铁与杨树黄叶病的关系研究
14.Any of various deciduous trees such as the tulip tree, basswood, or cottonwood.白木树如美国鹅掌揪、椴、三角叶杨等各种落叶树
15.A Study on the Over-Compensation Effect of Poplar from Leaf Loss杨树失叶对生长超越补偿作用的研究
16.A Research Abstracting Methyl Salicylate from the Leaves of Purpurea;从冬青树叶中提取水杨酸甲酯的探讨
17.Any of several North American poplar trees, especially Populus deltoides, which has triangular leaves and a tuft of cottony hairs on the seeds.三角叶杨，棉白杨北美洲的一种杨树，尤指普通白杨有三角形叶片、种子上有束棉絮状绒毛
18.Any of several trees of the genus Populus having leaves attached by flattened leafstalks so that they flutter readily in the wind.白杨一种树白杨属，叶长在扁平的叶柄上，因此易于随风飘动
相关短句/例句
poplar leaf杨树叶
1.The influence of poplar leaf on the production performance and eggs quality of layers;杨树叶对蛋鸡生产性能及鸡蛋品质的影响
2.The influence of poplar leaf on the utilization rate of the protein and fat in laying hen;杨树叶对鸡日粮中蛋白质和脂肪利用率的影响
3)poplar tree leave杨树单叶
4)Poplar leaves杨树叶片
1.Poplar leaves contain abundant interfering compounds such as polyphenols,pigments,polysaccharides and so on,which make it difficult to extract proteins.杨树叶片中因含有丰富的多酚、色素、多糖等物质,给蛋白质的提取带来了困难。
5)Poplar leaf pellet feed杨树叶颗
6)Myrica rubra leaves杨梅树叶
1.Objective:In order to provide theoretical bases for developing Myrica rubra leaves and processing and preserving Myrica rubra fruit, the chemical constituents in volatile oils from Myrica rubra cv Dongkui leaves, fresh fruit and stale fruit were analyzed and compared.目的:比较分析杨梅树叶与果实、新鲜果与贮藏果的精油成分,为杨梅叶的开发和杨梅果实的保鲜及加工提供理论依据。
2.The forteen same components were detected in the three kinds of Myrica rubra leaves.采用气相色谱-质谱联用技术对木叶、黑炭、东魁3个品种杨梅树叶中的挥发油进行分析比较。
延伸阅读
春季杨树常见病害杨树溃疡病主要发生于苗木移植过程中，3下旬开始发病，4月中旬至5月下旬为发病高峰期，6月初基本停止，10月后稍有发展。该病可侵染树干、根茎和大树枝条，但主要危害树干的中部和下部。发病初期树干皮孔附近出现水泡，水泡破裂后流出带臭味的液体，内有大量病菌。病部最后干缩下陷成溃疡斑，病斑处皮层变褐腐烂，当病斑横向扩展环绕树干一圈后，树即死亡。杨树长势衰弱时易发病。防治方法：①选用壮苗造林，起苗时尽量避免伤根，运输假植时保持水分。②定植前用ABT3号生根粉溶液沾根，定植时浇足底水，定植后对幼树干部喷施5406细胞分裂素1000倍液。③春季在树干下部涂上白涂剂，或用0.5波美度石硫合剂，或用1:1:160波尔多液喷干，可预防树干感染，降低发病率。若发病率在50%以上时，涂干也不会有明显效果，可平茬。杨树黑斑病该病5月初开始发生，夏秋最盛，直至落叶为止。可危害杨树叶片、叶柄、果穗、嫩梢等，在其上形成角状、近圆形或不规则的黑褐色病斑，直径约1毫米，有的达5毫米。病斑多时可连成不规则的大块斑，引起早期落叶。防治方法：①选育抗病杨树品种。②发病期间，苗圃和幼林用200倍的波尔多液或85%代森锌250倍液喷洒。③合理密植、及时间伐，保持林内通风透光。及时清扫林内落叶，以减少病源。④可在6月上旬喷40%多菌灵800倍液，或25%百菌清600至800倍液，或O.3%尿素及磷酸二氢钾混合液防治。杨树叶枯病该病从杨树叶片抽生开始，危害杨树叶片、嫩梢和幼茎，受害叶片以5至6月感病最重。受害的叶片上出现近圆形、多角形或不规则形的病斑，直径1至5毫米，病斑多时可连成大斑。病斑上有黑褐色霉状物。嫩梢和嫩茎上的病斑凹陷，呈棱形，上有绿色霉层。防治方法：①从发病开始，进行药剂防治，在整个生长季节喷2至3次药，可用40%乙磷铝300倍液，或75%百菌清500倍液，或50%多菌灵1000倍液防治。②及时清除枯枝落叶，并带出林外集中烧毁或埋沤制肥，以减少菌源。杨树腐烂病主要危害杨树枝干、枝条的各个部位，病斑形状不规则，大小不等。发病初期病斑呈暗褐色，水渍状，后失水干缩下陷，有时病斑开裂成丝状。后期在病斑上密生出许多小黑点。潮湿时，从病斑的小黑点中能长出卷曲的，橘黄色的丝状物。该病的病斑每年向外扩展，当包围枝干一圈时，上部枝、干会全部死亡。在春、夏降水量大的年份，腐烂病发病严重。防治方法：①用刀刮除病斑，应刮至健部，再在病斑上涂10倍的食用碱水，或20％农抗120水剂10倍液，连涂2至3次即可。②春天或秋天，在树干下部涂上白涂剂，生石灰、食盐、水的配制比例为1:0.3:10。（来源：《中国花卉报》2004.03.18）
