摘要
在施氮180kg/hm2与不施氮条件下,比较了宽窄行和等行距两种栽培方式对超级杂交早稻陆两优996产量形成特性与氮利用效率的影响。结果表明:(1)与等行距栽培相比,宽窄行栽培具有一定的增产作用,增产原因在于:促进分蘖,提高有效穗数;促进穗分化,提高每穗总粒数;增大叶面积,延缓叶片衰老,促进物质积累;降低茎鞘物质输出率,改善源库关系。(2)与等行距栽培相比,宽窄行栽培的氮素累积量、氮肥利用率与氮素吸收效率显著提高,氮收获指数与氮素利用效率显著下降,而氮生理效率与氮肥效率变化不大。
Effects of wide-narrow-row and equal-row on yield formation characteristics and nitrogen utilization efficiency of super early rice combination Luliangyou 996 were comparatively studied under conditions of 0 and 180 kg /hm2, and the main results showed that （1） wide-narrow-row treatment could increase yield at a certain extent compared to equal-row treatment, and the reasons on yield-increasing were heightening effective painicle by promoting tillering, heightening grain number per panicle by promoting spike differentiation, promoting dry matter accumulation by increasing leaf area and delaying senescence of leaves, decreasing output percent of stem-sheath store matter and improving source-sink relationship. （2） Compared to equal-row treatment, nitrogen accumulation, nitrogen use efficiency and nitrogen uptake efficiency in wide-narrow-row treatment were increased significantly, nitrogen harvest index and nitrogen utilization efficiency were decreased significantly, while nitrogen physiological efficiency and nitrogen fertilizer efficiency changed unobviously.
出处
《作物研究》
2010年第1期12-15,18,共5页
Crop Research
基金
湖南省重大科技专项(2006NK0001)
湖南省自然科学基金项目(09JJ4008)
湖南农业大学人才基金项目(06YJ29)
湖南省普通高校青年骨干教师培养计划项目
关键词
水稻
栽培
宽窄行
产量形成
氮利用效率
陆两优996
Rice
Cultivation model
Wide-narrow-row
Yield formation
Nitrogen utilization efficiency
Luliangyou 996
