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对两系法亚种杂交组合两优培九进行大苗移栽、中苗移栽、小苗移栽与乳苗移栽试验 ,初步研究了群体的吸氮特性。结果表明 :(1)四种方式植株含氮率一生均呈逐渐下降趋势 ,移栽苗龄越小 ,下降越明显。其中拔节至抽穗期含氮率下降最剧 ;(2 )移栽苗龄减小 ,一生总吸氮量减少 ,生物、经济产量均呈逐步下降趋势 ;(3)不同苗龄处理生育前期的吸氮量多 ,四种方式之间的差异不大 ,中后期是吸氮量差异形成的主要时期 ,苗龄越小者吸氮量越少 ;(4 )四种方式不同生育阶段的吸氮强度均以拔节至抽穗期为最大 ,此前的移栽至拔节阶段亦较高 ,此后吸氮强度下降 ;(5)综合分析四种栽培方式 ,大、中苗移栽在不同生育时期吸氮量较多 ,吸氮强度大 ,一生总积累量多 ,氮素生产力较高 ,更适合作为两优培九的超高产栽培
The hybridization of two lines of subspecies Liangyoupeijiu large seedling transplanting, transplanting seedlings, transplanting seedlings and transplanting seedling test preliminary study of the characteristics of nitrogen uptake. The results showed that: (1) Nitrogen rate of all four kinds of plants decreased gradually throughout the life, and the smaller the seedling transplanting age, the more obvious the decline. (2) The transplanted seedling age decreased, the total nitrogen uptake decreased in the whole life, and the biological and economic yield showed a gradual downward trend; (3) There was not much difference between the four methods. The mid-and late-stage was the main period during which the nitrogen uptake was different. The smaller the young age was, the less the nitrogen uptake was. (4) The nitrogen uptake intensity (5) A comprehensive analysis of four cultivation methods, large and medium seedlings transplanted at different growth stages of nitrogen uptake than the average More nitrogen absorption intensity, the total amount of accumulated life, high nitrogen productivity, more suitable as super-high-yield Liangyoupeijiu cultivation