本文对黄河、长江、珠江三角洲土壤中5种微量元素的形态分配及其地理分布趋势进行了研究。
The partitioning and regional distribution of 5 trace elements in soils from Yellow River, Yangtze River and Pearl River Deltas were studied.
河流的出口是河流进入海洋的地方。大多数的河流在出口处变得非常宽阔，土壤在那儿沉积，形成三角洲。
The river's mouth is the place where a river goes into the ocean. Most rivers become very wide at their mouths, forming deltas from soil deposited there.
黄河三角洲是海陆交互作用形成的退海地，土壤形成时间相对较短，地面植被演替频繁，整个生态系统比较脆弱。
Yellow river Delta is the retired land formed from the river-sea interaction, the soil formed shortly, and the vegetation evolves frequently, the whole ecosystem is vulnerable, too.
在河流漫滩和三角洲地带由洪水冲刷泥沙沉积而形成的土壤类型。
Alluvial soil a type of soil formed on river floodplains and deltas, where new sediment is deposited on the land during floods.
对黄河三角洲不同演替阶段湿地土壤线虫的群落特征进行了研究。
The characteristics of soil nematode communities at different succession stages of wetland were studied in the Yellow River Delta.
作者首先介绍了珠江三角洲地区饱和粘土的特点，确定了以土壤孔隙为主的特征参数。
At first, the saturated clay's character of ZhuJiang delta is introduced and some parameter about pore is established.
干三角洲部位经过多年的开垦，地下水位出现上升，随着深层盐分上移，也将导致土壤盐渍化发生。
For the delta part, salt accumulation would occur in the surface taking into account the increasing groundwater level under continuous cultivation.
三种酶可以作为评价黄河三角洲冲积平原湿地土壤肥力的指标。
So enzyme activities could be used as an index for soil fertility evaluation of wetlands covered with different vegetation in Yellow River Delta.
三种酶可以作为评价黄河三角洲冲积平原湿地土壤肥力的指标。
So enzyme activities could be used as an index for soil fertility evaluation of wetlands covered with different vegetation in Yellow River Delta.
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