秧田秧苗分蘖结构对水稻生长发育的影响

EFFECTS OF TILLERING COMPONENTS OF SEEDLINGS ON THE GROWTH AND DEVELOPMENT OF RICE

育秧历来是水稻栽培中一个重要的环节,一般都要求培育壮秧。但是壮秧的标准基本上从形态上衡量,不能形 成1个量化的指标。秧苗分蘖结构是一个新提出的概念,用秧田秧苗分蘖结构可以量化中、大秧苗素质。本试验的研 究认为,中、大种苗情况下不同分蘖结构的秧田秧苗对水稻的生长发育有差异,分蘖结构合理的秧苗移栽时植伤轻, 栽后活棵快,早生快发,有效穗高,最终产量较高;而分蘖结构不合理的秧苗前期生长迟缓,无效分蘖增多,有效穗不 足,因而产量难以提高。本试验的结果说明,用秧田秧苗分蘖结构衡量水稻秧苗素质是合理的、可行的。

The results in a field experiment indicated that considerable differences existed between rice seedling nurseries in the growth and development of the seedlings in them. Appropriate tillering components of seedlings accelerated their early growth rate after transplanting and resulted in more effective panicles, thus leading to higher grain yield. It is concluded that it is feasible to quantitatively evaluate the quality of rice seedlings with their ' tillering components' - a concept developed recently by the authors of the paper.