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作者	单位
付陈陈，刘子晶，蔡瑞国，郭双双，徐东娜，史金平，张敏	（1.河北省作物逆境生物学重点实验室/河北科技师范学院农学与生物科技学院，河北秦皇岛 066004；2.秦皇岛市耕地质量监测保护中心，河北秦皇岛 066004）

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中文摘要:

为探索冀东平原强筋小麦适宜的氮肥施用模式，选用2个强筋小麦品种（津农7号和中麦998），在总施氮量为210 kg·hm_-2的前提下设置4种施氮模式（CK：底肥50%+拔节肥50%；N1：底肥30%+起身肥20%+拔节肥50%；N2：底肥50%+拔节肥30%+孕穗肥20%；N3：底肥30%+拔节肥50%+孕穗肥20%），研究了不同施氮模式对强筋小麦氮素积累、转运、籽粒蛋白质及其组分含量的影响。结果表明，与CK相比，N2和N3处理提高了强筋小麦干物质积累量，显著增加植株花前氮素积累量及其转运量。花前氮素对籽粒氮素的贡献率因品种和处理而异，津农7号花前氮素对籽粒氮素的贡献率以CK最高，中麦998花前氮素对籽粒氮素的贡献率以N2处理最高。与CK相比，N2和N3处理显著增加小麦籽粒的蛋白质含量，提高醇溶蛋白和谷蛋白含量；2个强筋小麦品种籽粒产量均以N2处理较高。综上所述，本试验条件下，总施氮量的20%后移至孕穗期可提高强筋小麦植株干物质积累量，促进花前积累氮素向籽粒转移，提高籽粒蛋白质含量；N2处理可使津农7号获得最高的籽粒产量和蛋白质含量；中麦998在N2处理下籽粒产量最高，N3处理下蛋白质含量最高。

英文摘要:

In order to explore the suitable nitrogen(N) fertilizer application mode for strong gluten wheat in Jidong Plain,two strong gluten wheat varieties(Jinnong 7 and Zhongmai 998) were selected as materials.The total N application rate was 210 kg·hm_-2,and four N application modes were set up (CK:base fertilizer 50% + jointing fertilizer 50%; N1:base fertilizer 30% + starting fertilizer 20%+ jointing fertilizer 50%; N2:base fertilizer 50% + jointing fertilizer 30% + booting fertilizer 20%; N3:base fertilizer 30% + jointing fertilizer 50% + booting fertilizer 20%),to study the effect of N application mode on plant N accumulation and transportation,and grain protein and its component contents. The results showed that compared with CK treatment,N2 and N3 treatments promoted dry matter accumulation of strong gluten wheat,and significantly increased plant N accumulation and translocation at flowering stage. The contribution rate of pre-anthesis N to grain N varied with cultivar and treatment. The contribution rate of CK treatment for Jinnong 7 was the highest,while for Zhongmai 998,N2 treatment reached the highest contribution rate. Compared with CK treatment,N2 and N3 treatments significantly increased the protein contentin of the two wheats,also improved the contents of gliadin and gluten.The grain yields of the two strong gluten wheat varieties under N2 treatment were the highest among four N application modes. In summary,under the experimental conditions,moving 20% of the total N application to the booting stage increased the dry matter accumulation of strong gluten wheat plants,promoted the transfer of accumulated N before anthesis to the grain,increased the accumulation of storage protein,and then improved the grain protein content. N2 treatment made Jinnong 7 reach the highest grain yield and protein content; while Zhongmai 998 showed the highest grain yield under N2 treatment,and the highest protein content under N3 treatment.

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