[Horizontal transport of nitrate in main soil groups of Huang-Huai-Hai Plain].
The horizontal transport of nitrate in main soil groups (yellow fluvo-aquic soils and aeolian sandy soil) in Huang-Huai-Hai Plain was studied. The results were as follows: the horizontal transport velocity of nitrate decreased with the distance of the tracer source in power function. Due to different soil property in soil profile, the curves of horizontal transport of nitrate were difference. The horizontal transport velocity of nitrate was controlled by the concentration gradient and soil water potential gradient in 20 cm of horizontal soil column. It was stable after 20 cm, which was controlled by soil matric potential. The horizontal transport velocity of nitrate was in a sharp positive relation with the soil moisture content and changed with exponential function. The concentration of nitrate in horizontal transport decreased with the unsaturated soil water diffusivity increased and changed with logarithmic function.
Chen
Xiaomin
X
College of Natural Resources and Environmental Science, Nanjing Agricultural University, Nanjing 210095, China. xiaominchen@263.net
Deng
Jiancai
J
Zhang
Jiabao
J
Zhu
Anning
A
Pan
Youyu
Y
D004058:Diffusion; D009566:Nitrates / Q000032:analysis*; D012987:Soil / Q000032:analysis*
D009566:Nitrates; D012987:Soil