Regional Distribution and Environmental Risk Assessment of Chemical Fertilizer Application Rate in Henan Province
LIU Qin-pu
Abstract：In order to correctly understand the potential threats of chemical fertilizer to environment in Henan province and prevent chemical fertilizer pollution ,model of environmental risk assessment was used to analyze the distribution of chemical fertilizer application rate and assess the environmental risk .The results showed that chemical fertilizer was overused in 18 cities ,resulting in great potential risk to environment ,the average risk to environment was at moderate level .In the 18 cities ,there were 8 cities in serious environmental risk state ,10 cities in moderate environmental risk state ;nitrogen (N ) and potassium (K ) posed moderate risks to environment ,phosphorus(P) posed serious risk to environment .The proportion of N ,P ,K was basically reasonable ,but there were greats differences in chemical fertilizer application rate among different regions in Henan province .The chemical fertilizer application rates in the north of Henan province were highest ,especially Xinxiang city (1 240.40 kg/ha );the chemical fertilizer application rates in the south of Henan province was lowest ,especially Sanmenxia city (588.33 kg/ha) .
Keywords：chemical fertilizer application rateregional distributionenvironmental risk assess-mentHenan province
Publication Date：2014-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 66-70 )