根系

Quantitative analysis of root architecture, or the spatial configuration and distribution of the root system in the soil, will facilitate our understanding of root structure, function and their interactions in the ecosystem.

根构型是根系在土壤中的空间造型和分布。对植物根构型进行定量分析，有助于人们了解根系结构和根系功能在生态系统中的重要作用。

Under lower potassium stress, the high efficiency ramie genotypes had higher growth potential (higher relative root dry weight, relative rootlet dry weight, relative root total and active absorb surface area), and higher relative fiber yield, decreased the negative effect of lower potassium stress on fiber quality validly.

但高效基因型苎麻低钾胁迫下仍具有较强的生长势（相对根系干重、相对细根干重、相对根系总吸收面积、相对根系活跃吸收面积较大），其纤维产量所受影响程度小于低效基因型，有效降低了低钾胁迫对纤维品质所引致的负面影响。

The root number of the slash pine plantation is negative correlative to density of stand; the 4.0 cm diameter roots number is correlative to gross root number, it can be regard as one of trees nutrition standards.

湿地松人工林的根系发达程度与林分密度负相关；4.0cm径级根系数量与根系发达程度正相关，可以作为林分营养水平标准。

After pretreatment with Ca(NO3)2,W7 and TFP in improving and blocking Ca2+*CaM messenger system, membrane damage in strawberry leaf was relief by Ca(NO3)2treatment, at the meanwhile, salt damage index was reduced, the content of prolinc and chlorophyll were enhanced, Pn, EVAP and GS were improved, ABA content in root and leaf was reduced, the content of ZTJAA, GA and ZT/ABA were enhanced, the content of unaturated fatty acid increased, whereas, saturated fatty acid content in leaf and root was reduced, the rate between unaturated fatty acid and saturated fatty acid and index of unaturated fatty acid were enhanced.

在Ca(NO_3)_2、W7和TFP喷叶预处理促进或阻碍Ca~(2+)·CaM信使系统传导后，发现Ca(NO_3)_2处理能减轻叶片的膜伤害，降低盐害指数，增加脯氨酸含量和叶绿素含量，提高净光合速率、蒸腾速率、气孔导度，降低根系和叶片中的ABA含量，增加ZT、IAA和GA含量和ZT/ABA比值；提高叶片和根系中的UFA含量、U/S比值和IUFA，降低根系和叶片中的SFA含量。

According to analysis of root exudates by HPLC, aluminum induced roots of stylo to secret citrate and its secretion increased with Al concentration treated (0, 10, 20, 50 umol L-1) and the period of exposure to Al (6, 12, 18, 24 h), which indicated that Al-induced secretion of citrate is an important mechanism for stylo to resist the toxicity of aluminum.

采用高效液相色谱法对根系分泌物的分析发现，铝诱导柱花草根系分泌柠檬酸，并且其分泌量随铝处理浓度0、10、20、50 μmol L~(-1和时间(6、12、18、24 h)的增加而增加，表明铝诱导根系分泌柠檬酸是柱花草抵御铝毒害的重要机制。

Analyzed the effect factors of Abies fabric root system strength,of which the root diameter and root length are the important effect factors, the interaction of root diameter and root length bring on the strength of Abies fabric root system.

分析了影响冷杉根系侧强曲线的因素，其中冷杉根系的根径和根长为影响其侧强曲线的主要因素，根系的抗拉强度的大小是根径与根长共同作用的结果。

The pattern of vertical distribution of organic matter in mangrove soil reflected the roots distribution. Surface roots were abundant in Avicennia marina forest, so organic matter of soil in top layer (0-20cm) was the most there. However, the organic matter of soil in Kandelia candel forest was the most in middle layer (20-40cm) because roots were abundant in middle layer while there were fewer roots on surface soil. Content of organic matter in bottom layer (40-60cm) was generally lower in two mangrove forests.

1红树林土壤有机质的垂直分布模式反映了根系的分布状况，在地表根系发达的白骨壤林，表层土壤有机质含量高，而在地表少根而根系多集中分布于中层的秋茄林，中层有机质含量高，下层土壤有机质含量一般较低。

Following 5 experiments were conducted: Experiment 1: Effects of soil moisture and AM inoculation on root morphology and fractal character in Broussonetia papyrifera Vent Effects of Glomus mosseae and water stress on morphology and fractal characteristic of root system in Broussonetia papyrifera L.

为此，设计如下的5个试验：试验1：土壤水分与丛枝菌根真菌接种对构树根系形态特征和分形特征的影响利用WinRhizo根系分析系统，在石灰土基质上对不同土壤水分条件下接种AM真菌Glomus mosseae对构树幼苗根系的形态特征和分形特征的影响进行了研究。

Total biomass, root morphological index, root activity and the amount of xylem sap excaudate were measured. Results showed that under non-water stress conditions, NH4+-N supply increased the average diameter of rice roots and accumulation of shoot biomass, while NO3--N increased total root absorption area and biomass accumulation in roots.

结果表明，正常水分条件下，NH4+-N促进水稻根系平均直径增大，有利于水稻地上部物质累积；NO3--N则使水稻根系总吸收面积增大，促进根系物质累积；NH4+-N/NO3--N为5/5处理的水稻活跃吸收面积最大，活跃吸收面积比亦最高。

In 0～20 cm soil layer, there is a considerable effect of herb plant root system on soil anti-shearing strength. Soil anti-shearing intensity (15.33 kPa) by Medicagosativais highest. Particularly in the 20～40 cm soil layer, Melilotus officinalisand M. sativacan drastically enhance soil anti-shearing strength.

试验表明，在0~20 cm土层4种草本植物根系均可显著增加土壤抗剪切强度，其中紫花苜蓿根系对土壤抗剪切强度的增强作用最大，其增大土壤抗剪切强度值为15.33 kPa；草木樨和紫花苜蓿根系在20~40 cm土层也能明显增大土壤抗剪切强度。

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。