查询词典 stem cutting

However, the transformation rate from dominant stem to overtopped stem and from overtopped stem to dominant stem were the lowest. The interconversion of classified stem would increase as the stand density and the rate of L. gmelinii was going up. The altitude that classified stem mainly concentrated was less than 1000m, slope was less than 25°, aspect was south slope, position was at middle and lower, soil depth less than 17cm. The rate of no interconversion was 66.7% among overtopped stem. It should cut the overtopped stem as intermediate cutting.

优势木转被压木和被压木转优势木的转换率最低；随着林分密度和林分中落叶松比例增加，分级木相互转换数也增多；分级木转换现象主要集中在海拔＜1000m、坡度＜25°、坡向为阳坡、坡位为中下、土壤厚度＞17cm的林分中；被压木中，无转换的占66.7%，抚育采伐时应考虑伐除这些被压木。

Several types of stem cutting are used, differentiated by the ripeness of the wood.

几种类型的干切削的使用，但有区别的，由成熟的木材。

Stem/leaf ratio of all of seven lines was lower than that of the corresponding alfalfa varieties in both cutting. In the first cutting stem/leaf ratio of BHJR5 was the lowest and in the second cutting stem/leaf ratio of BHSHS6 was the lowest.

57个白花品系第一茬和第二茬的茎叶比均小于相应的紫花母株，其中第一茬BHJR5的茎叶比最小，第二茬BHSHS6的茎叶比最小。

The effects of different cutting-root methods (time of the cutting, distance of cutting surface to stem base, and the numbers of cutting surface) and K top-dressing measures at later growth stage on K content in leaves of flue-cured tobacco plants were studied.

从断根时间、断根部位、断根数量、断根时追钾与否及追施钾素的形态等方面研究了不同处理及其组合对烤烟烟叶含钾量的影响。

The study reveals that the species is amenable for clonal propagation by mature stem cutting.

结果表明，番石榴是适合利用茎段进行扦插繁殖。

In order to improve the tissue culture technology of Siraitia grosvenorii, stem cutting with single nod was used as explants, MS as basal medium and supplied with LFS or CPPU respectively.

为给罗汉果组培技术的改进提供实验证据，以罗汉果单芽茎段作外植体，以MS为基本培养基，分别添加LFS和CPPU等生长调节剂。

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。

Comparison of different types of stem cutting in rooting induced and analysis the cDNA clones which may be associated with the occurrence of adventitious roots of P.euphratica,the model of ARF were initial establishment of exogenous IBA controlling endogenous IAA occurred threshold and equilibrium,that is,exogenous IBA receiving by receptor of stem cutting,and transfer into the cells,then turn into active IAA by the effects of the POD enzyme.

通过对胡杨3个不定根发生调控培养体系的比较和与胡杨不定根发生可能相关的差异基因的克隆分析，初步建立IBA调控胡杨不定根发生的内源IAA阈值和激素间平衡的模型，即外源IBA通过插穗受体接收，转入细胞内并在POD酶作用下转化成具有活性的IAA，当IAA的水甲在促根的阈值内并保持相对平稳时，则有利于生根；当IAA的浓度增高超过阈值且不稳定时，则抑制不定根的发生。

G. cutting roots from 4 surface on the position 20cm away from the stem base nor cutting roots too near from stem base e.

若断根数量太多（如距茎20厘米处4面断根），或断根位置距茎基部太近（距茎基部10厘米处1面或4面断根），都不利于叶片含钾量提高

Hardening was significantly related to the survival rate of plantlets after transplanting. The application of stem cutting seemed to result in more rapid and sufficient seed production during the short period than the tuber seed did.

温室强化处理后可增加移植之成活率，切枝扦插之成活率，切枝扦插法除了可防止线虫病害之傅播外，对薯球之生产不但比种薯直接播种时间缩短，而其方法简便迅速，并可生产多量之薯球。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失