1) Selenium absorption rate
根系硒吸收速率
2) Root-Water-Uptake Rate
根系吸水速率
1.
Root-Water-Uptake Rate and Root Length Density Distributions of Winter Wheat at Seedling Stage under Subirrigation;
浸润灌溉条件下苗期冬小麦根系吸水速率与根长密度分布
4) uptake rate
吸收速率
1.
Marine copepods, Acartia erythraea, were exposed to waterborne copper, silver, and copper and silver mixture respectively in a series experiment during which the metal contents in exoskeleton, polar and nonpolar parts in animal cells were measured and the uptake rate, efflux rate constant for Cu~ 2+ and Ag~ + were calculated.
通过对桡足类动物红纺锤水蚤(Acartiaerythraea)分别在Cu2+、Ag+、Cu2++Ag+混合溶液中的暴露实验,测定了其对Cu2+、Ag+的吸收速率常数、排出速率常数,并对Cu2+和Ag+在动物体内的分布状况进行了分析。
2.
The effects of inorganic nitrogen(N)and phosphorus(P)concentrations,N∶P ratio and different chemical forms of nitrogen on the uptake rate of N and P by Gracilaria tenuistipitata var.
在实验室条件下 ,研究了营养盐因子对细基江蓠繁枝变种的氮、磷吸收速率的影响。
5) absorption velocity
吸收速率
1.
s:Based on the two film theory, the relationships between all kinds of absorption velocity equations and corresponding absorption coefficients in the stable absorbing process are thoroughly discussed, which will provide multiple perspectives and methods for calculating and designing the absorption tower.
本文基于双膜理论探讨了定态吸收过程中各种形式的吸收速率方程式和各吸收系数之间的相互关系 ,对吸收塔的设计计算提供了灵活的思路和方
6) absorption rate
吸收速率
1.
Study on the absorption rate of nano-Cu on the ex vivo small intestine of broiler chickens;
离体肉鸡小肠对纳米氧化铜吸收速率的研究
2.
The absorption rates of H2S and/or CO2 in N-methyldiethanolamine(MDEA) aqueous solution at temperature of 20℃ were measured by experiments.
采用实验方法,测定了20℃时N-甲基二乙醇胺(MDEA)水溶液对H2S、CO2纯气体以及H2S和CO2混合气的初始吸收速率。
3.
An equipment for the measurement of kinetic data of gas absorption was improved and the data of absorption rate of CO_2 at different conditions in the system of N-methyldiethanolamine (MDEA)+2,3-butanedione+water were measured.
采用恒定容积法测定了不同条件下混合溶剂(w(MDEA)48 5%+w(2,3 丁二酮)5%+水)吸收CO2的吸收速率。
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