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笔者经过 11a的田间观察和反复实践 ,采用平行观测及统计分析 ,得出以下主要结论 :“蘖、主穗比”与穗实粒数及理论产量间呈极显著正相关 ,科学调控“蘖、主穗比”是水稻高产栽培的重要途径 ;“蘖、主穗比”与基本苗呈极显著负相关 ,通过少本、稀植栽培能极大地提高“蘖、主穗比” ,但过分强调“蘖、主穗比”将不能保证高产所需的穗数 ;水稻返青后前 15d产生的分蘖多为有效分蘖 ,而返青后 2 0d以后产生的分蘖基本上为无效分蘖 ,通过培育壮秧及适当重施基肥等措施 ,力促前期分蘖量 ,控制后期分蘖量 ,是提高水稻“蘖、主穗比”和成穗率的有效措施
The author through the field observation and repeated practice of 11a, using parallel observations and statistical analysis, the following main conclusions: “tiller, the main spike than” and spike grain number and the theoretical yield was a significant positive correlation between the scientific regulation of “tillering, Main spike ratio ”is an important way for high-yielding cultivation of rice;“ tillering and main spike ratio ”have a significant negative correlation with basic seedling, and the increase of“ tiller and main spike ratio ” “Tiller, Lord ear ratio” will not be able to ensure the high yield of the required number of spikes; rice regrown the first 15d produce tillering mostly effective tillering, and after turning green 20d after tillering is basically ineffective tillering, Appropriate re-base fertilizer and other measures to promote the early tillering amount, control the amount of late tillering, is to improve the rice “tiller, main ear ratio” and the effective measures of ear