查询词典 leaf

According to function requirement of the leaf cleaner, whole plan of the cleaner was decided elementally when the moving mechanism of leaf being striped from sugarcane was analyzed.

深入分析了整杆式甘蔗收获机械设计开发的瓶颈——剥叶机构的工作机理。提出了剥叶机构的总体设计方案。

Papaya leaf curl China virus occurred widely and caused severe disease in papaya in the suburb of Nanning,Guangxi Province.In 2002—2004,the incidence rate reached 47.23%—100% in severely infected papaya fields,and the symptoms in infected papaya included stunt,downward leaf curling,dark green vein and enation,and petiole twist.

番木瓜曲叶病毒病在广西南宁市郊区发生严重并造成很大经济损失，经2002-2004年调查，重病果园发病率高达47.23%-100%，染病番木瓜矮缩，叶片向下卷曲，叶背部叶脉增生，叶柄扭曲，早期染病植株无法开花结果。

The results indicated that the etiolation cause of the substrate mature leaf was the deficiency of available nitrogen in the soil. Spraying urea on the yellow leaves can turn the color of substrate mature leaf to green, but it does not have such effect on new shoots.

结果表明，土壤中有效N含量低是导致茶树下部成叶黄化的原因，喷施尿素能使下部成叶快速转绿，但并不能使上部新梢转绿。

The physiological disease, leaf etiolation, can easily occur in young tea trees planted in brown soil with higher pH value (＞6.5) in Shandong province. All leaves of some trees turned yellow, some leaves of new shoots turned white to a certain extent or had some brown spots on the yellow leaf margin.

在山东pH偏高（＞6.5）的棕壤幼龄茶园中，茶树容易发生失绿黄化病症，严重影响了新建茶园的成园速度。

They are 1 Cold-Temperate Mountain Hard-leaf Evergreen Oak Forest and 2 Temperate Needle and Broad Leaf Mixed Forest.

应该重点保护的植被类型是：寒温山地硬叶常绿栎类林、温凉性针阔叶混交林。

The results were as follows: Being infected virus, the electrolyte exosmosis rate of tobacco leaf was increased , while the increase rate of the leaf being injected ion was less than that of the control. The activities of SOD?

结果表明：病毒侵染后烟草叶片电解质外渗率增大，但离子注入后烟草的电解质外渗率增幅小于对照；病毒侵染后烟草叶片的超氧化物歧化酶、过氧化物酶、硝酸还原酶的活性及叶绿素含量均有所下降，但离子注入后烟草的上述酶活降幅较小；CAT活性在接毒后呈先低后高的变化，而对照在接毒后 10天该酶活性高出离子注入烟草 2倍多，随后剧降，到接毒 2 5天时仅为离子注入处理烟株 1/ 2。

It also discussed the relationship between the main chemical compositions of tobacco leaf surface exudates and the aroma of tobacco leaf.

展望了烟叶腺毛及其分泌物的研究方向和途径，提出烟叶腺毛及其分泌物研究的意义和目的。

Females had a significant preference for laying their eggs and feeding on primary leaf to trifoliate leaf of field bean.

雌蝇在豆苗之真叶与复叶上产卵或取食时，均对豆苗之真叶具显著偏好性。

In addition, the edges, veins, skeleton and fissility of plant leaf are also primary features for plant morphology. So we also studied the method of the automatic extraction of these structural features from leaf images, which is a necessary step to design an automatic plant species system.

另外，叶片的叶缘、叶脉、骨架、裂深等叶片结构特征是植物数值分类学的主要分类性状，也是植物形态学分类的依据，通过数字图像处理技术实现这些性状的自动提取，是计算机辅助植物物种识别的重要内容和必然环节，所以对这些叶片结构特征的自动提取方法也进行了研究。

The results showed that diploid and tetraploid had higher root activity, flagleaf soluble protein content, SOD and CAT activity before anthesis. However, the rootactivity, flag leaf soluble protein content, SOD and CAT activity of diploid and tetraploiddeclined more quickly and became lower than those of hexaploid species from 15 days afteranthesis. While MDA content increased more quickly and became higher than those ofhexaploid species from 5 days after anthesis. Correlation analysis showed that delaying the flag leaf senescence can promoted transfer of nitrogen and dry matter, increasedaccumulation of nitrogen and dry matter after anthesis, enhanced grain and protein yield.

结果表明，与普通小麦和小黑麦相比，二倍体和四倍体材料开花以前具有比较高的根系活力、可溶性蛋白含量、SOD和CAT活性；开花以后，根系活力、旗叶可溶性蛋白含量、SOD和CAT活性快速下降，MDA含量快速上升，衰老加快；相关分析表明，延缓小麦旗叶衰老进程，可以促进花后氮素和干物质运转，增加花后氮素和干物质积累，提高籽粒产量和籽粒氮素积累量。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。