1) vegetation roots
植被根系
1.
Field surveys and experimental analysis were used to detect the relationship between spatial changes of vegetation roots and soil environmental factors under different grazing gradients in an alpine meadow.
以野外样地调查和室内分析法研究了不同放牧梯度下高寒小嵩草草甸的植被根系空间变化和土壤环境因子间的关系。
2) vegetation system
植被系统
1.
Elastic limit and plastic limit appear after a disturbance to vegetation system.
植被系统受到干扰后,会出现弹性极限与塑性极限。
2.
This paper analyzes the relationship between groundwater and the ecology vegetation system in arid area based on quantifying the goals of ecological regeneration in the Shiyang River Basin,and some measures are put forward for social and economic development in the drainage basin based on implementing water-saving irrigation and building the Minqin Oasis as an ecological special region.
通过分析地下水与干旱区生态植被系统的关系,在量化流域生态恢复目标的基础上,提出了石羊河流域经济发展与生态保护对策。
3) plant covering
植被群系
4) plant roots
植物根系
1.
Influence of plant roots on heat and moisture migration in vegetation soil bed;
植物根系占位对土壤热湿迁移的影响
2.
Effects and mechanisms of plant roots on slope reinforcement and soil erosion resistance:A research review;
植物根系固坡抗蚀的效应与机理研究进展
3.
Effects of plant roots on soil anti-erosion;
植物根系对土壤抗侵蚀能力的影响
5) plant root
植物根系
1.
Advances in CT image segmentation technology for plant roots in situ;
植物根系原位CT图像分割方法的研究进展
2.
In order to discuss the reinforced effect of plant root from the aspects of mechanical mechanism,authors analyzed the rule that how plant roots reinforced the slope by direct shear test and numerical analysis method.
为了从力学机制上探讨植物根系的锚固作用,采用室内大型直剪试验和数值分析方法,对植物根系锚固的有关规律进行分析。
3.
Most kinds of plant root uptake models from the first one presented by Gardner in1960 to the latters are reviewed and classified.
综述了自1960年Gardner第1个单根吸水模型建立以来的植物根系吸水模型，对模型加以分类，并对其优缺点和适用性进行了阐述，可供现代节水灌溉的理论和应用研究参考。
6) plant root system
植物根系
1.
Effects of elevated atmospheric CO_2 on plant root system: A review;
大气CO_2浓度升高对植物根系的影响
2.
According to the characteristics of geometrical modeling which can describe exactly the structural features of plant root systems,a method about modeling of plant root systems is proposed.
根据几何构造模型能够准确表达植物根系形态结构的特点,提出了一种植物根系三维建模方法。
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