根系

The vertical roots of short-lived grasses Erodium axyrrhynchum and annual grasses Ceratocarpus arenarius formed before May so to avoid the drought season.

3一年生草本植物角果藜的根系垂直生长主要发生在4月至5月中旬，短命植物尖喙牻牛儿苗的根系垂直生长主要在5月之前，两者都是在干旱季节来临之前垂直根迅速生长，以增加水分吸收。

Oil pollution set limit to Gleditsia japonica Miq, and Hippophae rhamnoides L, and the restriction increased with pollutant concentration.

山皂荚、沙棘苗木表现为，石油污染抑制根系的生长，且污染物的浓度越高，对根系生长抑制作用表现越明显。

The activities of both SOD and POD of leaves and root system were en hanced during the early stage of high temperature treatment, and then dropped as the time went on.

在高温处理过程中，根系和叶片SOD及POD酶活性的变化均表现为先升高而后下降的趋势，但叶片SOD和POD活性下降较早，其下降幅度亦大于根系，表明地上部受高温影响较大。

Observation under optical and transmission electron microscopes showed that the Cu-contaminated leaves were thickened, with the expansion of leaf cell and the incrassation of palisade tissues. The yellow leaves might result from the damage to chloroplasts. Cortical cell death in root system might also have a negative effect on root water absorption and transportation, causing plant water content decreased.

通过光镜和投射电镜观察，发现紫云英污染叶变厚，其原因是叶片细胞膨大和栅栏组织增厚；叶片转黄与叶绿体遭破坏有关；根系部分皮层细胞死亡可能影响根系吸水和植株水分运输，导致植株含水率降低。

The trace of 59Fe with Malus.micromalus cultured innutrient solution under the controlled conditions indicate:distribution of 59Fe in cuttingroots and leaves were 18.1% and 70.9%,respectively.Most of iron was transported toleaves and little iron was distributed in roots when iron was root-inserted.

室内营养液培养的八棱海棠苗用59Fe示踪结果表明，断根中分配的59Fe为18.1％，叶中分配的59Fe占70.9％，说明根系输液绝大部分铁运往地上部，根系分布很少。

The induced rate of rooting with naphthaleneacetic acid was higher than indolebutyric acid. The medium supplemented with 50 mg/l ascorbic acid and 0.5 mg/l NAA could improve the growth and development of root system. 57.5% of shoots could develop to the well-rooted plantlets and develop into healthy and fertile plants when planted in soil.

将芽体分割进行发根试验的结果显示，naphthaleneacetic acid诱导根系的效果优於indolebutyric acid，添加50 mg/l抗坏血酸和0.5 mg/l NAA之培养基则有更好的效果，约有57.5%的芽体可再生成具有旺盛根系的植株，经移植至土壤中也可生长健旺及正常开花。

And found root exudates have the promotable effect on the activity of IAAoxidase of cucumber and squash,.

在对其生理生化特性的研究中发现，根系分泌物显著的促进黄瓜和南瓜体内吲哚乙酸氧化酶的活性，从而降低其体内吲哚乙酸的水平，抑制其生长发育；根系分泌物还显著抑制受体淀粉酶的活性，这种抑制性随浓度升高而增加，通过影响黄瓜和南瓜体内的能量转化来影响其正常生长。

In addition,the numerical simulations of moisture behavior in fixed dune during the growth of Nitraria tangutorum and rainless period in June and August were conducted.

以野外实测数据为基础，运用数理统计方法确定非饱和导水率水分扩散率等沙丘水分运动参数，并从宏观角度建立了与水面蒸发强度沙丘水分含量相关的附加根系吸水项的白刺根系吸水模型。

The results from the verification and analysis of dune moisture simulated data showed that the precision of root uptake rate was higher,and it was able to indicate the regularity of water uptake during the rainless period,the predicted moisture distribution curve in the dune profile during Nitraria tangutorum growth season by the use of mathematical model was basically consistent with the measured one.

沙丘水分动态模拟结果的验证与分析表明：根系吸水率精度较高，能较正确反映无雨时段根系吸水规律；用所建数学模型预测的白刺生长期沙丘剖面含水量与实测值分布曲线拟合较好。

Vetiveria zizanioide is possesses strong depth roots and have better anchoring force and shear resistance; Vetiveria zizanioides is growed in ringent hinged joined concrete extending system,and its roots are interlaced and make foundation soil compound materals of soil and roots,but grass roots are considered three-dimensional reinforced materal and increase soil strength but also make for the stability of bank protection.

香根草具有纵深发达的根系系统，具有较高的锚固力和抗剪力。通过在开孔的铰链式混凝土块铺面系统中种植香根草，其根系在基土中盘根错节，使基础土体成为土与草根的复合材料，草根可视为三维加筋材料，使土体强度提高；更有利于护岸防冲系统的稳定。关键词：香根草，铰链式混凝土块，防冲护岸系统

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。