摘要： 以冀粳14号的主茎和不同蘖位1~4次分蘖为材料，研究了水稻中位蘖的分蘖规律与生产力。结果证实，中晚熟水稻品种主茎有两个蘖位转折期，依此将主茎蘖位划分为下、中、上3部分；水稻主茎3~n-1蘖位为中部蘖位。在中位蘖中，主茎n蘖位上一次分蘖与主茎n-2蘖位下一次分蘖具有n-2的蘖、蘖同伸规律，即纵向上主茎每长2片叶，横向上分蘖次数增加1次的规律，在所有1次分蘖中，n-1和n-2蘖位1次分蘖生产潜力最大；在所有2次分蘖中n-3和n-4蘖位2次分蘖生产潜力最大；在所有3次分蘖中n-5和n-6蘖位3次分蘖生产潜力最大；合理利用中位蘖优势具有149%左右的增产潜力。

关键词: 水稻, 中位蘖, 分蘖规律, 生产力, 增产潜力

Abstract: Studies on tiller regularity of the middle tillering part and productive forces of rice with main stem and differentt illeres of 14 t illering part of rice variety Gigeng 14 were carried out.The results show ed that there were two tiller turning points on the main stem of middle or late maturing rice variety. The main stem was divided into the below , the middle and the upper three partes. The tillering part of main stem 3-n1 means the middle tillering part. In the middle tillering part, up one g rade t illering of the main stem n part and below one grade t illering of the main stem n2 part follow st retching regularity of n2 tillering and tillering. During main stem grows two leaves at vertical tillering grade increases one grad at crossw ise. 1st grad tillering of n1 and n2 tillering parthave the biggest productive potent ial in all 1st g rad t illering; 2nd grade tillering of n3 and n4 tillering parthave the biggest product ive potentialit ies in all 2nd grade tillering; 3rd grade tillering of n5 and n6 tillering parthave the biggest productive potentialities in all 3rd grade tillering. Therefore if superiority of the middle tillering part is utilized rationally,there will be 14.9% potent ial of increase yield.

Key words: Rice, Middle tillering part, Tillering regularity, Productivity, Potential of increase production

中图分类号: 

• S511.101