The major ions changjiang show characteristics of hco3 > c1 " + so42 ~ for anions and ca2 + > mg2 + + na + + k + for cations independent of variations of sediment concentration and ph 在河口盐度梯度上,主要阳离子浓度可以用长江河水与口外海水的线性混合所预测。
The results show that cu and zn tend to be quasi - conservative , whereas cd , co and ni are remobilized over a broad salinity range in the changjiang estuary 和ni在长江口盐度梯度上固一液相态变化,并将模型输出结果与长江口几种金属的历史观测资料进行了对比。
Influences of the inclined pressure item caused by salinity - gradient on the flow and those of the deepening of the channel on the invasion of salt water are analyzed by use of a three - dimensional salinity mathematical model for the north channel of the yangtze river estuary 利用长江口北槽三维水流盐度数学模型分析了盐度梯度引起的斜压项对水流的影响,以及航道增深对盐水入侵的影响。
Both species grew poorly in the culture medium absent of salt , especially to a . corniculatum . moderate salt stress ( from 5 to 20 ) can stimulate the growth of both species , and the optimum salinity for growth was from 10 to 15 . when the substrate salinity was higher than 30 , stem height , root length , dry mass increment , net photosynthetic rate fell remarkably for both species 温室内人工盐度梯度栽培下,木榄幼苗地上、地下部分形态和生物量的增长均表现为低盐促进和高盐抑制,以10 15盐度下最适合木榄幼苗的生长;盐度从10增加到50时,木榄幼苗的净光合速率、气孔导度和蒸腾速率均随之下降。
Length , diameter , density , fresh weight , dry weight , water content , osmotic potential and element concentrations ( ca , mg , na , k , cl ) were determined for each . seedling of b . gymnorrhiza and a . corniculatum were cultured for 60 days on various salinity of seawater ( 0 , 5 , 10 , 15 , 20 , 30 , 40 , 50 ) in green house . samples were taken at 3 , 7 , 11 , 15 , 22 , 30 , 45 and 60 days after planting , separated into root , hypocotyl , stem and leaf 本文研究了福建九龙江口木榄和桐花树胎生繁殖体从果实形成到发育成熟过程中形态、生物量、含水量、胚轴密度、渗透势、五种主要矿质元素( ca 、 mg 、 na 、 k 、 cl )等的变化和温室内人工盐度梯度栽培下木榄和桐花树成熟繁殖体长成幼苗( 0 60d )过程中形态、生物量、含水量、渗透势、光合蒸腾特性、五种主要矿质元素( ca 、 mg 、 na 、 k 、 cl )等的变化;并且在野外自然条件下,跟踪调查不同滩涂位置下秋茄成熟繁殖体定居成活、自然死亡状况以及测定幼苗生长过程中( 1年)形态、生物量、含水量、光合蒸腾特性等的变化。
盐: salt度: surmise; estimate梯度: gradient; grad度梯度凝泳: temperature gradient gel electrophoresis对比度梯度: contrast gradient负温度梯度: negative temperature gradient高度梯度: altitudinal gradient黑度梯度: density gradient金属度梯度: metallicity gradient静密度梯度: static density gradient零温度梯度: zero temperature gradient慢度梯度: slowness gradient密度梯度: de ity gradient; density gradients密度梯度法: density gradient menthod密度梯度管: density gradient column; density gradient tube密度梯度柱: density gradient column浓度梯度: cg concentration gradient; concentration gradiant; concentrationgradient; concentraton gradient; density gradient强度梯度: intensity gradient深度梯度: concentration gradient; depth gradient湿度梯度: moist gradient; moisture gradient速度梯度: gradient of velocity; gradient velocity; velocity gradient速度梯度区: velocity gradient zones温度梯度: gradient of temperature; gradient, temperature; moisture gradient; temp grad; temperature grade; temperature gradiant; temperature gradient; temperature lapse rate; temperature slope; temperaturegradient; thermal gradient; thermograde; tone'smal gradient温度梯度法: temperature gradient method温度梯度炉: gradient furnace