1)  habitats
根系深度
2)  root
根系
1.
Effects of enhanced UV-B radiation on the growth of aerial parts and root of maize;
紫外辐射增强对玉米地上部分与根系生长的影响比较
2.
Effects of Different Nitrogen Treatments on Root Architecture of Malus hupehensis Rehd.;
不同施氮处理对平邑甜茶根系构型的影响
3.
Effects of waterlogging on root respiration intensity and respiratory enzyme activities of sweet cherry;
淹水对甜樱桃根系呼吸强度和呼吸酶活性的影响
3)  roots
根系
1.
The effects of crop on N_2O emission from loess soil: roots and N_2O emission from soil;
作物对黄土性土壤氧化亚氮排放的影响——根系与土壤氧化亚氮排放
2.
Effect of roots of sugar beet,maize and soybean on the amount of soil microbe;
甜菜、玉米和大豆根系对土壤微生物数量的影响
3.
Responses of Anti-oxidative Enzymes in Pistacia chinensis Roots to Drought Stress;
黄连木根系抗氧化酶系对干旱胁迫的响应
4)  root system
根系
1.
Effects of the root system of Agrostis stolonifera on the decontamination of municipal domestic wastewater;
匍匐翦股颖草坪根系对城市生活污水的净化效应
2.
Studies on root system biomass of the plants in several kinds of wetland.;
几种湿地植物根系生物量研究
3.
Preliminary study on the relationship between seasonal dynamics of microfauna in the root system of water hyacinth and their effects on the purification of waterbody;
凤眼莲根系微型动物群落的季节动态与净化效能的关系初探
5)  plant roots
根系
1.
From the crown to the plant roots of the plants,they reduce the flows and its amouring the soil,improve the soil infiltration of the flows,reduce the sediment transport on the slope,as a result,the water and soil losses also became smaller.
植被从林冠至根系在不同层面上减缓径流对土壤的冲刷 ,并改善土壤入渗 ,减少坡面泥沙的输移 ,使水土流失量减少。
2.
To assess the effectiveness of plant roots on elements transport of loess soil during the heavy rainstorm,a field study was carried out on nutrients transport in the forest(Pinus tabulaeformis) soil as affected by pine roots and farmland soil with no roots as the cont.
本文用原状土柱淋滤实验装置及大型挖掘剖面壁法,定量分析了特大暴雨下不同深度土层油松林根系影响土壤元素的稳定输出通量的剖面特征,旨在探索黄土区林木根系对土壤养分生物有效性的提高途径。
3.
Different plant roots may have potential impacts on nutritious elements movement in soil profiles.
不同植物群落根系对土壤元素迁移具有显著影响,不同基因型植物细根的特殊剖面分布特征,是其适应和改善土壤养分物理化学逆境的生理生态学基础。
6)  root systems
根系
1.
Comparison research on water transportation of non-drought and drought-stressed tomato root systems;
干旱胁迫对西红柿根系水导的影响研究
2.
To detect the expression of PIP2-5 in maize root systems under water deficit,semi-quantitative PCR was used.
在PEG-6000模拟水分亏缺条件下,以微管蛋白基因为内参基因,水通道蛋白基因PIP2-5为检测基因,采用半定量逆转录聚合酶链式反应(RT-PCR)体系检测PIP2-5基因在玉米根系中的表达的结果表明,人工模拟水分亏缺条件下PIP2-5基因表达量高于正常水分条件下的。
3.
Several plant root systems are probed using method of 3D excavation.
采用三维坐标挖掘法对宁夏南部山区梯田埂坎上较为常见的几种植物根系分布进行了调查,并对根系的伸展模式进行了分类。
参考词条
补充资料:茶树根系吸收矿质元素


茶树根系吸收矿质元素
absorption of mineral elements by the root system of tea plant

  茶树根系吸收矿质元素、absorption()fmineral elements by the root systemof tea Plant)茶树根系从土壤和水中吸收离子状态元素的过程。根系对矿质元素的吸收是一个生理过程.受到内外因素的形响。 茶树根系是吸收矿质元素的主要器官。茶树根系吸收矿质元素以根尖为多,离幼根尖端2一3匣米处礴的移动l为最大。根毛部是根尖吸收矿质离子最活跃的区城。根系吸收矿质离子有被动吸收和主动吸收(或主动运拍)。被动吸收不需要代谢供能,包括扩散、离子交换吸附,杜南(Donnan)平衡:主动吸收是靠细胞代谢供能而递浓度差吸收矿质离子。矿质离子从根部表面进入木质部有两条途径:一是经共质体的主动运愉;二是经质外体从内皮层进入共质体到中柱。一般说来,主动吸收是根系吸收矿质的主要形式。 茶树根系对矿质的吸收受年龄、生育期、代谢强弱、修剪等的形晌。成龄茶树的吸收利用率.氮是50%,确是22.5%,钾是45%。幼龄茶树分别为25%、4%、7.5%。在全年中,氮和钾的吸收主要集中在4一11月:礴则集中在4一6月和9月,各占总吸收最的均%和38%。茶树修剪后一个月左右,根系对氮、碑、钾的吸收还在减少,氮和钾的吸收恢复较快,恢复后,以对氮的吸收为最迅速。 土坡条件影响茶树根系对矿质的吸收。①土坡水分和氧气:土坡通气良好,氧气充足,CO:浓度减少,呼吸增强,促进根系生长和对水、肥的吸收;土坡水分过多,氧气缺乏,CO:浓度增高,抑制有筑呼吸,降低根系对矿质的吸收。土城水分不足,限制矿质盐类的溶解;燕腾速率降低,亦阻碍矿质离子向上运愉。因此.土坡水分常控制或促进茶树对矿质元素的吸收、利用。②上城溶液浓度:在一定范围内,根系吸收矿质元素的数量随施肥t的增加而提高,但超过一定量时,离子载体与矿质离子结合达到饱和,根系吸收矿质离子不再增加。祁门茶叶研究所多年研究表明:梅5()0克氮可收获鲜叶25千克左右.亩产鲜叶一吨左右.年施氮以20一30千克为宜.超过30千克,虽能提高产量.但利用率不高。③土城沮度:根系吸收矿质随土沮升高而加快,以25一30℃为宜。沮度过高或过低都抑制根系对矿质元素的吸收。④土坡pH:宜茶的土城pH为4.5一6.5,以pHS.2一5.6最好。一般说来,阳离子的吸收随上坡pH上升而增加,阴离子的吸收随pH的上升而降低。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。