Author(s): ZHOU You-xin
Pages: 63-65
Year: 2013 Issue:  10
Journal: Journal of Henan Agricultural Sciences
Keyword:  nitrogen leaching; fertilizer; water environment; farmland; artificial rainfall;
Abstract: To understand the characteristics of fertilizer nitrogen(N) leaching under artificial rain-fall conditions ,different water-nitrogen treatments were designed to track N .The results showed that the fate of fertilizer N leaching could be divided into three parts :runoff ,seepage and sedi-ment brought by seepage ,the fertilizer N content in the seepages was the highest ,accounting for 36 .55% -42 .86% of the total fertilizer N leaching ,and fertilizer N content in the sediment and the runoffs took up 30 .77% -40 .00% and 23 .45% -26 .59% ,respectively .The NO3--N concen-tration in the runoffs ,seepages ,and sediment was significantly positively related with the N appli-cation ;the fertilizer N content and NO3--N concentration in the seepages were notably higher than those in the runoffs ,suggesting that the fertilizer nitrogen application would threaten the groundwater environment .