[Quantitative input of atmospheric nitrogen to an agro-ecosystem in a typical red soil region].
The atmospheric nitrogen (N) deposition flux and dry deposition N velocities (Vd) were estimated using big leaf resistance analogy model by observations of onflow and factors of farmland microclimate, analysis of nitrides from the atmosphere and rain in an agro-ecosystem, a typical red soil region on Experiment Station of Red Earth Ecology, Chinese Academy (Yingtan, Jiangxi) of Sciences in 2005. The results showed that the dry deposition N was 82.63 kg x hm(-2), accounting for 67.94% of the total N, which was 132.6 kg x hm(-2) in the whole year (2005). In N dry deposition progress, NH3-N and NO3- -N were the main settlement for gas and particle, respectively. NH3-N was made up 43.02% to 89.89% (mean value, 71.05%) of the gaseous N deposition while NO3- -N was accounted for 33.67% to 94.54% (mean value, 61.01%) of the particle N deposition. The N wet deposition fluxes were 0.50-8.45 kg x hm(-2) per month and reached the higher value in July and November.
Cui
Jian
J
College of Geography Science, Nanjing Normal University, Nanjing 210046, China. cuijianx@163.com
Zhou
Jing
J
Yang
Hao
H
Liang
Jia-ni
JN
Liu
Xiao-li
XL
D000388:Air / Q000032:analysis*; D001272:Atmosphere; D002681:China; D018556:Crops, Agricultural / Q000254:growth & development*; D017753:Ecosystem; D009584:Nitrogen / Q000032:analysis*; D011891:Rain / Q000737:chemistry; D012987:Soil / Q000032:analysis*
D012987:Soil; D009584:Nitrogen