1) mineral element contents
矿质积累
1.
Through filling the mine subsided area with coal fly ash and covering with 60 cm compound soil mixed with coal fly ash, the physiological functions and mineral element contents of Festuca arundinacea grown in reclaimed area with coal fly ash were studied.
对高羊茅生长发育、生理功能和矿质积累的研究结果表明 :含 30 %以下粉煤灰复合土能提高高羊茅植株光合作用和氮素利用能力 ,促进植株生长 ,不会对植株产生伤害 ;当复合土中粉煤灰含量达 4 0 %时 ,高羊茅光合作用、蒸腾作用和氮素利用能力降低 ,细胞膜脂质过氧化水平升高 ,膜透性增大 ,SOD、POD和CAT活性降低 ,植株生长被抑制 ;随着复合土中粉煤灰含量的升高高羊茅植株Mn、Zn、Ca、Mg的质量分数升高 ,Cu的质量分数无显著变化 。
2) mineral nitrogen accumulation
矿质氮累积
1.
Two methods,one for determing residual urea (RU) and one for determing mineral nitrogen accumulation (MNA) were used for measuring urea hydrolysis rates in soils,and a comparison of the results was made under aerobic and waterlogged incubation conditions.
分别用测定残留尿素(直接法)和矿质氮累积量(间接法)的方法,测定了土壤的尿素水解速率,并比较通气培养和淹水培养期间尿素水解的异同。
4) Accumulated Mineralization
累积矿化
1.
A Preliminary Report on the Accumulated Mineralization of Organic Matter in Latosolic Red Earths and the Balance Forecast of Soil Organic Matter;
有机质在赤红壤中的累积矿化及平衡预测初报
5) material accumulation
物质积累
1.
Regulation of phosphate on growth and material accumulation of Dunaliella salina;
磷酸盐对盐藻生长与物质积累的调控作用
2.
The material accumulation was its base for format.
始粒期荚壳物质积累量大是多粒荚和大粒荚形成的物质基础。
3.
0 mg/L in the culture medium,in which cell density was less and in turn low material accumulation.
试验结果表明,培养液中锰质量浓度过高或过低都不利于盐藻细胞的生长与物质积累。
6) Matter accumulation
物质积累
1.
Effect of pod shading on pod and seed matter accumulation at soybean seed formation stage;
大豆始粒期荚遮光对荚粒物质积累的影响
2.
The result of the study on the proceeding in stem mustard hybrid matter accumulation indicates: various organs of stem mustard hybrid material accumulation correspond "Logistic" growth curve;the growth peak period of stem is in 15.
对茎瘤芥杂交种的物质积累过程进行了研究,结果表明,茎瘤芥杂交种各器官的物质积累符合Logistic生长曲线;各器官旺盛生长期:茎为15。
3.
In order to master the growth orderliness of different types of feeding maize,the growth duration and leaf area and dry matter accumulation and water content were studied under five densities(48 000,58 500,69 000,79 500 and 90 000 plants/hm~2) on silage type maize of keduo 8 and foodstuff type maize of shaandan 310 in use at present.
0万株/hm2等5个密度进行生育期、叶面积、干物质积累和植株含水量等性状研究,结果表明:两类型饲用玉米收获期的植株含水量均在60%以上。
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