1) root architecture
根系构型
1.
The mutant displays the following interesting phenotypes: (1) improved drought tolerance as well as enhanced tolerance to salt and oxidative stresses; (2) altered root architecture with deeper roots, more lateral roots, and increased root biomass, and (3) reduced stomatal density, which are all important agronomic traits sought for improving drought tole.
该突变体特异表型为:显著增强的抗旱性;优良的根系构型(深根与多测根);与降低的叶片气孔密度,这些性状正是作物抗旱节水改良所期望的性状。
2.
Responses of nitrogen and water on root architecture were investigated by layered digging.
通过分层挖掘法,研究了膜下滴灌棉花根系构型对水氮的响应。
3.
The parameters of root architecture,total root length,surface area,volume,tips,branching angle and fractal dimension etc,were analyzed in young seedlings of Malus hupehensis(Pamp)Rehd.
研究水培条件下缺氮、缺铁对平邑甜茶幼苗根系总长度、表面积、体积、根尖数、分枝角度、分形维数等根系构型参数的影响。
2) root architecture mode
根系结构模型
3) architecture characteristics of root systems
根系构型特征
4) Root architecture
根构型
1.
Regulation effect of soil P availability on mycorrhizal infection in relation to root architecture and P efficiency of Glycine max;
磷有效性对大豆菌根侵染的调控及其与根构型、磷效率的关系
2.
Study on Classification, Uptake-characteristics and Regulation of Root Architecture in Apple Stock;
苹果砧木根构型的分类、吸收特性及其调控研究
3.
Effects of Cutting Roots on the Root Architecture of Platycladus Orientalis Seedlings;
切根对侧柏幼苗根构型的影响
5) root system structure
根系结构
1.
In order to provide further insight to the response of plant to climate changes,the effects of elevated atmospheric CO_2 concentration,increased temperature and their interactions on root system structure of Betula albo-sinensis seedlings were researched with artificial enclosed-top chamber system.
CO2浓度和温度升高对植物产生了深刻的影响,为从多角度对这种影响进行研究,该文利用封闭式生长室系统控制CO2浓度和温度,以红桦幼苗为材料,研究了CO2浓度升高、温度升高以及二者同时升高对川西亚高山红桦幼苗根系结构的影响。
6) root structure
根系结构
1.
This paper analyzes the developing trend of the root water uptake model,and points out that we should pay attention to the future research on the root mechanism and root structure,and modify and improve the existing root water uptake models for the purpose of making it become the theoretical base of various agricultural activities.
分析了根系吸水模型的发展趋势,指出必须注重根系机理和根系结构的研究,并修改和完善植物根系吸水模型,使之成为多种农业活动的理论基础。
2.
The root structure is an important factor to affect the plant s life.
根系结构是影响植物生长的重要因素 ,本文首次探讨了分形模型在植物根系结构研究中的应用 ,并以马尾松为例分析了马尾松根系结构与分形维数的关系。
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。
参考词条