mineral nitrogen

Soil Mineral Nitrogen Loss in Surface Runoff and Sediment as Affected by Slope Gradient on Loess Slope

坡度对坡面土壤矿质氮素水蚀流失负荷的影响

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。

The Sources of Mineral N Released by EUF and Their Effect on Reflection of Soil Nitrogen Supplying Capacity

EUF析滤出的矿质氮源及其反映土壤供氮能力方面的效果

Slope gradient has many impacts on soil erosion by water and mineral nitrogen loss in an erosion process.

坡度是影响坡面水土流失和土壤养分流失过程的重要因素。

The effects of different nitrogen concentration, forms and proportion on the root activity, chlorophyll and mineral elements of Chinese chive.

研究了不同供氮水平、不同形态氮素及配比对韭菜的根系活力、叶绿素含量和矿质元素含量的影响。