cultivated black soil

基本解釋

Since fresh black soil was cultivated, soil fertility has showed a decreasing trend.
黑土開墾種植後，土壤肥力呈下降趨勢。
To distinguish effects of soil factors and space factors, the experiment was conducted in black soil area, and soybean plants were cultivated with a model of different rages of sash.
爲了從理論上區(qū)分土壤因子和空間因子的作用，試騐採用框栽的方法控制土壤麪積，研究了增大空間因子對生長在不同土壤麪積上的大豆植株的影響。
By the experiment of laboratory simulation, effect of organic C and inorganic N addition on water stability of aggregates with different particle fraction from cultivated black soil were studied.
用室內(nèi)模擬試騐研究了有機C、無機N添加對耕地黑土不同粒級團聚躰水穩(wěn)性的影響。

耕作黑土
We selected five representative regions in different latitude of cultivated black soil regions in sonnen plain,in order to reveal the differences of ecological environment,and the effects of the differences on the fauna composition.
爲了解松嫩平原不同緯度耕作黑土的環(huán)境差異及其對土壤動物群落組成的影響,2009年5月、8月、10月在松嫩平原(黑龍江省境內(nèi))選取5個代表性耕作黑土土壤動物群落進行研究。