施氮量对机插杂交籼稻干物质生产特性的影响

以超级杂交稻准两优527和Q优6号为材料,研究4种不同施氮水平下机插杂交籼稻干物质生产特性。结果表明：随着施氮量的增加,机插杂交籼稻的最高茎蘖数、株高、最高苗数、叶面积指数均逐渐增大。在拔节期、孕穗期和抽穗期,随着施氮量的增加,茎鞘干物质的比例均有下降的趋势,而叶干物质的比例增加;成熟期的茎鞘干物质变化规律不明显,叶干物质的比例随施氮量的增加有增加的趋势,而穗则呈现相反趋势。随着施氮量的增加,有效穗数、每穗总粒数、产量均呈增加的趋势,千粒重、结实率均呈现先增后减的趋势。在本试验条件下,施氮量和产量之间呈抛物线关系,机插杂交籼稻的最佳施氮量为201.62 kg/hm^2,最高产量达8181.68...

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Bibliographic Details
Published in广东农业科学 Vol. 42; no. 21; pp. 1 - 5
Main Author 李香玲 冯跃华 王小艳 王雨荷 李开兵 叶勇 王旭 李杰
Format Journal Article
LanguageChinese
Published 贵州大学农学院,贵州贵阳,550025 2015
Subjects
产量
干物质
施氮量
籼稻
籼稻
干物质
产量
施氮量
Online AccessGet full text
ISSN1004-874X

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Summary:以超级杂交稻准两优527和Q优6号为材料,研究4种不同施氮水平下机插杂交籼稻干物质生产特性。结果表明：随着施氮量的增加,机插杂交籼稻的最高茎蘖数、株高、最高苗数、叶面积指数均逐渐增大。在拔节期、孕穗期和抽穗期,随着施氮量的增加,茎鞘干物质的比例均有下降的趋势,而叶干物质的比例增加;成熟期的茎鞘干物质变化规律不明显,叶干物质的比例随施氮量的增加有增加的趋势,而穗则呈现相反趋势。随着施氮量的增加,有效穗数、每穗总粒数、产量均呈增加的趋势,千粒重、结实率均呈现先增后减的趋势。在本试验条件下,施氮量和产量之间呈抛物线关系,机插杂交籼稻的最佳施氮量为201.62 kg/hm^2,最高产量达8181.68 kg/hm^2。
Bibliography:44-1267/S
Super hybrid rice Zhunliangyou 527 and Q you 6 were used to research the characteristics of dry matter of mechanized transplanted hybrid indica under 4 different N-fertilizer application rate. The results showed that with the application rate of fertilizer-N improved,the highest stem tillers number,the height,the maximum seedlings and the leaf area index increased gradually. At jointing stage,booting stage and heading stage,the stem/sheath ratio of dry decreased gradually with increment of nitrogen application amount,whereas ratio of leaf dry matter were increased. At maturity stage,the change law of stem/sheath ratio was not obvious,and the leaf area index increased with the application rate of fertilizer-N improved,whereas the spike dry matter ratio were just the opposite. With the application rate of fertilizer-N improved,the effective spikes,grains per spike and yield increased,and the grain weight,setting rate first increased,and then decreased. There is a parabolic relation between nitrogen app
ISSN:1004-874X