茎

In the fangshan nursery of zhonglin company, Beijing ,on the basis of poplar tree vessel seedling 's weeding experiment with 11 weed killers in the greenhouse , the effects of 12 weed killers on seven broad-leaf tree seedlings were separately carried on by the way of soil treatment and leaf treatmen in the field . The research results indicated that 24% oxyfluorfen EC treated soil surface with quantity of 40-80ml each 667m2,the weeding effect can reache above 95%; 10% imazaquin AS with quantity of 15-25 ml each 667m2, and 30% benazolin-ethyl EC with quantity of 56-76 ml each 667 m2 were sprayed on the weeds or leaves of the seedlings, the weeding effects can reach above 81% and 85% respectively, but safe to nursery stock growth .

在北京中林公司房山苗圃基地，用11种除草剂配方在塑料大棚杨树容器苗试验的基础上，对大田七个阔叶树种苗圃用12种除草剂配方分别进行土壤处理和茎叶处理，结果表明，用24%惠尔乳油，每667m2用商品量40-80ml作土壤处理，除草效果达95%以上；用10%咪唑喹啉酸水剂和30%草除灵乳油每667m2用商品量分别为15-25ml和56-76ml作茎叶处理，除草效果分别达81%和85%以上，对苗木生长安全。

Endophytic Bacillus subtilis strain B47,which was isolated from the stem of tomato, was an efficient biological control agent on tomato bacterial wilt. A strain resistant to streptomycin derivative of wild strain B47 was used to study the colonization ability and fluctuation of populations in soil and tomato organs, and its biological control on tomato bacterial wilt.

从番茄茎分离的内生枯草芽孢杆菌菌株B47对番茄青枯病有较好的防治作用，利用该菌株的抗链霉素突变菌株，研究其在土壤和番茄植株根，茎中的定殖能力及其对番茄青枯病的防治作用。

The plant is a tender annual with a rough, succulent, trailing stem and hairy leaves with pointed lobes; the stem bears branched tendrils by which the plant can suspend itself.

植株柔嫩，茎被毛，肉质，多汁；叶被绒毛，具3～5枚裂片；茎上生有分枝的卷须，藉此缘架攀爬。

The plant is a tender annual with a rough, succulent, trailing stem and hairy leaves with pointed lobes; the stem bears branched tendril s by which the plant can suspend itself.

植株柔嫩，茎被毛，肉质，多汁；叶被绒毛，具3～5枚裂片；茎上生有分枝的卷须，藉此缘架攀爬。

The plant is a tender annual with a rough, succulent, trail ing stem and hairy leaves with pointed lobes; the stem bears branched tendrils by which the plant can suspend itself.

植株柔嫩，茎被毛，肉质，多汁；叶被绒毛，具3～5枚裂片；茎上生有分枝的卷须，藉此缘架攀爬。

The most suitable explants for in vitro growth were shoot-tips and stem segments from sprouting cutting which were plugged in water or in vermiculite under weak light more than 24 h.

最适合的外植体是新切下的枝条插入含有蛭石和充足水的营养钵中24h以上，使其在弱光下迅速长出嫩枝的茎切段和茎尖。

The transformation efficiency of potato via Agrobaterium tumefaciens system was studied,and the result showed that stem cutting is better than leaf for its high callus induction efficiency ,strong ability to differentiation and regeneration and easy to obtain.

并对遗传转化体系进行了优化：采用加入AgNO3有效的防止了外植体在培养过程中的褐化问题；对于转化过程中预培养的时间、共培养时间、农杆菌浸染时间和浸染浓度进行了试验，茎段的预培养2天、叶盘预培养3天，共培养时间茎段为3天、叶盘以2天为宜。

And the lesion number of severest diseased stem is over 100, the percentage of disease in Brown Spot is around 60%. From the result of fungicide test, we know the Difolatan, Benlate and Orthocide are the more effective for controlling Stem Blight, but the percentage of prevention don't reach the perfect effect. The effect of other fungicides is not good. So we must continue to work to search for safe, and ideal fungicides as the index of prevention.

由药剂试验结果，以Difolatan（预防率：100p.p.m为80.95%，200p.p.m为83.33%），Benlate（预防率：100p.p.m为85.71%，200p.p.m为92.85%），Orthocide（预防率：100p.p.m为71.42%，200p.p.m为73.80%），三种药剂对茎枯病之防治效果最佳，但预防率未达百分之百，其他药剂之防治效果不佳，故仍需进一步寻求安全、有效之防治药剂，以供今后笋农防治茎枯病之依据。

Starch sheath The innermost layer of cells of the cortex replacing the endodermis in some stems, especially young herbaceous dicotyledonous stems. Its cells contain prominent starch grains.

淀粉鞘：在部分植物的茎的皮层中，尤其是双子叶草本植物茎，代替内皮层结构的最里一层细胞，其内含有明显的淀粉颗粒。

The cultural characteristics between hypovirulent strain and high virulent strain was highly distinct.The pathogen of banana anthracnose latents on fruit, foliage, bract, blossom and stalk, stalk of plants with this disease is the most important carrier. The infection type of bannana fruit anthracnose is latent infection.

在香蕉果皮、叶、苞片、花器及假茎上均有香蕉炭疽病菌潜伏，假茎的病残体带菌率最高，为主要的侵染来源；采后香蕉果实上炭疽病侵染型为潜伏侵染型；开花后20d 的香蕉果实开始带菌，随时间延长，带菌量逐渐增加，以后各个生长阶段的带菌率与降雨量有关；炭疽病菌在果指不同部位的分布存在差异。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。