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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 14 9%左右的增产潜力
Taking the main stem of Jijing 14 and tillers from 1 to 4 times of different tillers as materials, the tillering law and productivity of middle tillers were studied. The results showed that the main stem of medium and late-maturing rice varieties had two tillering stages, and the main tillering position was divided into three parts, ie, the lower part, middle part and upper part. The tiller position of 3 ~ n - 1 in main stem of rice was the middle tiller position. In the middle tiller, the last tiller on the main stem and the next tiller on the main stem n - 2 had the n - 2 tillering and tillering law, that is, the length of the main stem was 2 leaves long in the horizontal direction The number of tillers increased by 1 time. The tillering potential of n - 1 and n - 2 tillers was the highest in all the first tillers. The tillering production of n - 3 and n - 4 tillers at 2 tillers was secondary The potential for tillering of n - 5 and n - 6 tillers was the highest at 3 tillers in all 3 tillers. The yield potential of tillers with rational use of tillers was about 14.9%