摘要
[目的]明确超级稻适宜的施氮量及各生育期追施比例。[方法]采用3种不同施氮量(纯氮165、195、225kg/hm2)及各生育时期不同施氮比例共9个处理,对超级稻Ⅱ优航1号进行氮肥施用技术的试验。[结果]增加施氮量有利于超级稻成苗成穗,降低前期施氮比例、增施穗粒肥,有利于增加穗数。不同氮肥施用技术处理间超级稻地上部干物质积累差异明显,产量存在极显著差异。增加施氮量和前期氮肥施用比例,超级稻地上部干物质积累增加。各处理全生育期植株总吸氮量变幅为146.86～213.68kg/hm2,总吸氮量随氮肥施用量增加及后期施用比例提高而增加。增加施氮量和增施穗粒肥对水稻成穗数和穗粒数均有明显的影响。[结论]超级稻Ⅱ优航1号采用施氮量225kg/hm2,基施30%、插后7d施40%、幼穗分化2～3期施20%、始穗期施10%的氮肥施用技术,产量较高。
[Objective] The purpose was to confirm the proper N application rate and dressing N ratio in different growth stage.[Method] 9 treatments including 3 N application rates（pure N at 165,195,225 kg/hm^2） and different dressing N ratio in different growth stage was adapted to conduct the test of applying techniques of N fertilizer in super rice II Youhang 1.[Result] Increasing N application rate favored the seedling and spike form.Decreasing N application ratio and increasing panicle-spikelet fertilizer could favor to enhance spike number.Among the 9 treatments of N application the dry matter accumulation on aerial part of super rice had obvious difference and the yield had greatly significantly difference.Increasing N application rate and N application ratio in prophase could increase the dry matter accumulation on aerial part of super rice.The total nitrogen uptake in plants in whole growth period in different treatments varied in 146.86～203.68 kg/hm^2 and it enhanced with the increment of N application rate and N application ratio in anaphase.Increasing N application and panicle-spikelet fertilizerrate had obvious effect on mature spike number and grains per spike.[Conclusion]The super rice II Youhang 1 could get high yield by using such techniques of N fertilizer as N application rate of 225 kg/hm^2,with its N application ratio in different stage being 30% in base application,40% after transplanting for 7 d,20% in 2～3 stage of spikelet differentiation and 10% in initial heading stage.
出处
《安徽农业科学》
CAS
北大核心
2007年第36期11802-11803,11808,共3页
Journal of Anhui Agricultural Sciences
基金
上饶师范学院2004院课题(0406)
江西省社会科学"十一五"规划重点项目(06JY02)
关键词
超级稻
氮肥
施用技术
产量
Super rice
N fertilizer
Application techniques
Yield
