title: [Desorption characteristics of inorganic nitrogen in vegetable garden soil and their effects on soil NO3- -N loss potential].
abstract: With pot experiment and soil nitrogen desorption model, this paper studied the characteristics of nitrogen desorption in vegetable garden soil, and their effects on the NO3- -N concentration of soil leachate. The results showed that soil leachate NO3- -N concentration had a non-linear relationship with the parameters Q, Cli and C1/lamda of soil nitrogen, but the relationship became linear when these eigenvalues were relatively low. A conception of hi-curve cross point was put forward to assess the soil NO3- -N loss potential. When the eigenvalues were higher than the hi-curve cross point X0, the NO3- -N concentration in soil leachate would be increased rapidly in non-linear form, while on the contrary, the increase would be maintained at a lower level.
authors.affiliation: Institute of Soil and Fertilizer, Fujian Academy of Agricultural Sciences, Fuzhou 350013, China. yanmj163@163.com
authors.forename: Ming-juan
authors.initials: MJ
authors.lastname: Yan
authors.forename: Ming-qing
authors.initials: MQ
authors.lastname: Zhang
authors.forename: Zi-chong
authors.initials: ZC
authors.lastname: Chen
authors.forename: Juan
authors.initials: J
authors.lastname: Li
authors.forename: Qiong
authors.initials: Q
authors.lastname: Lin
authors.forename: Qi-tang
authors.initials: QT
authors.lastname: Wu
authors.forename: De-zhong
authors.initials: DZ
authors.lastname: Xiong
mesh_terms: D000327:Adsorption; D005308:Fertilizers / Q000032:analysis; D009566:Nitrates / Q000032:analysis*; D009584:Nitrogen / Q000032:analysis* / Q000737:chemistry; D011891:Rain; D012987:Soil / Q000032:analysis*; D014675:Vegetables / Q000254:growth & development*
chemical_list: D005308:Fertilizers; D009566:Nitrates; D012987:Soil; D009584:Nitrogen