摘要
以两类不同专用小麦为材料 ,研究了不同施氮量、基追比和追氮时期对其氮素吸收和氮肥利用率的影响。结果表明 :强筋小麦济南 17在生育中后期吸氮强度、氮素的转运效率和转运氮的贡献率 ,以及相同处理的蛋白质产量、氮肥利用率和氮素吸收效率均高于中筋小麦陕农 2 2 9。在本试验中 ,济南 17以施氮量为 2 6 2 5～ 32 8 1kg hm2 、追肥分拔节和始花两次施用 (2 5 %∶2 5 % )的氮肥运筹方式可以获得较高的蛋白质产量、成熟期总氮积累量和氮肥利用率 ;而陕农 2 2 9以施氮量为 196 9～ 2 6 2 5kg hm2 、拔节期追氮比例为 4 0 %～ 6 0
The study was carried out in 2000—2002. Two specific use cultivars of wheat, Jinan 17 and Shaannong 229 were used for the effect of different nitrogen application methods on N-absorption and N-utilization rate. The results indicated that N-absorption intensity, N-translocation efficiency and contribution rate of N transferring to grain in strong gluten wheat Jinan 17 were higher than that in middle gluten wheat Shaannong 229 at the middle and late developing stages, its yield of protein and N-utilization rate and N-absorption efficiency of the same treatments were also higher. In this test, 262.5—328.1 kg/ha of total N application with the proportion of 5∶2.5∶2.5, at seedling, jointing and flowering stage respectively was the optimum N application method for Jinan 17, while for Shaannong 229 that was 196.9—262.5 kg/ha of total N with 40%—60% topdressing at jointing stage.
出处
《作物学报》
CAS
CSCD
北大核心
2004年第5期449-454,共6页
Acta Agronomica Sinica
基金
科技部农业科技成果转化基金项目 (国科 [2 0 0 1] 5 67号 )
江苏省农业三项工程项目 [SX( 0 10 ) 2 0 0 0 0 12 5 2 ]资助
关键词
氮肥
专用小麦
氮素吸收
肥料利用率
施肥方式
Nitrogen application
Specific use cultivars of wheat
N-absorption
N-utilization rate
