作　　者： ; ;

机构地区： 华南农业大学资源环境学院植物营养学系

出　　处： 《植物营养与肥料学报》 2007年第3期498-503,共6页

摘　　要： 本研究通过在滴灌栽培条件下将脲酶抑制剂氢醌(简称HQ)、硝化抑制剂双氰胺(简称DCD)和尿素在玉米盆栽试验中进行配施,以探求HQ和DCD在滴灌施氮肥条件下应用的可行性。试验共设17个处理。试验结果表明:在滴灌施尿素条件下,加入0.3%HQ、0.5%HQ和5.0%DCD于溶液中,尿素的氮素利用率分别为74.8%、75.8%和75.3%,均显著高于单独施用尿素处理;当将HQ和DCD进行土壤施用并配合滴灌浇水时,HQ对提高氮肥利用率无显著作用,但DCD的施用能显著提高尿素氮的利用率;HQ和DCD在滴灌施肥条件下的施用效果要好于土壤施用效果。 ~ In order to evaluate the feasibility of addition of urease inhibitor （hydroquinone, HQ） and nitrification inhibitors （DCD） into urea solution applied in drip fertigation, a pot experiment with maize as a test crop was conducted under greenhouse condition. HQ and DCD were supplied through drip fertigation and soil application before sowing, and the dosages were 0.3%, 0.5% and 1.0% of urea application rate for HQ and 2.5%, 5.0% and 10.0% of urea rate for DCD. The results indicated that, under drip fertigation with urea solution, 0.3% HQ, 0.5% HQ and 5.0% DCD could significantly increase N use efficiency （NUE） as compared to fertigation with urea alone, and the NUE were 74.8 %, 75.8 %, 75.3 % respectively; When HQ and DCD were applied to soil under drip irrigation, HQ showed no positive effect on NUE. However, DCD increased significantly the NUE of urea with data as 61.9%, 54.6% and 58.4%, respectively. The NUE of urea with HQ and DCD application in drip fertigation system were higher than that with HQ and DCD applied into soil before sowing under drip irrigation.

关 键 词： 双氰胺 氢醌 滴灌施肥 玉米

领　　域： [农业科学] [农业科学] [农业科学] [农业科学]