CAJ | 학술논문

以小麦品种农大211为材料,在节水栽培条件下,研究了在天津市不同施氮量及氮肥运筹对小麦产量的影响,以明确实现目标产量的最佳施氮量。结果表明：在天津市北部地区春浇2水栽培条件下,施氮量为88.5～295.5 kg/hm2时,冬小麦产量随施氮量的增加而增加,但施氮量超过226.5 kg/hm2时小麦产量增加不显著,氮肥生产率呈现随施氮量增加而降低的趋势。在天津地区土壤条件下,氮肥一次性底施与分次施用的小麦产量略有差异,但施纯氮水平为226.5 kg/hm2时均能达到冬小麦产量为7 500 kg/hm2的产量目标。
이소맥품충농대211위재료,재절수재배조건하,연구료재천진시불동시담량급담비운주대소맥산량적영향,이명학실현목표산량적최가시담량。결과표명：재천진시북부지구춘요2수재배조건하,시담량위88.5～295.5 kg/hm2시,동소맥산량수시담량적증가이증가,단시담량초과226.5 kg/hm2시소맥산량증가불현저,담비생산솔정현수시담량증가이강저적추세。재천진지구토양조건하,담비일차성저시여분차시용적소맥산량략유차이,단시순담수평위226.5 kg/hm2시균능체도동소맥산량위7 500 kg/hm2적산량목표。
Taking Nongda 211 as experimental variety,under water-saving cultivation mode,the effects of different nitrogen application levels on the wheat yield were analyzed,in order to determine the optimum nitrogen strategy in Tianjin.The results showed that in northern Tianjin,irrigated twice in the spring,the yield of winter wheat increased along with the nitrogen augmentation（88.5-295.5 kg/hm2）,but the trend was not significant when nitrogen fertilizer application was higher than 226.5 kg/hm2;yield increasing ability of nitrogen fertilizer reduced with the increasing of application amount.There was slight difference between appling fertilizer once and in 2 times,both of which could reach the target yield（7 500 kg/hm2）with the total nitrogen of 226.5 kg/hm2,