摘要
以冀粳 14号的主茎和不同蘖位 1～ 4次分蘖为材料 ,研究了水稻的分蘖规律与分蘖生产力。结果证实 ,中晚熟水稻品种主茎有 2个蘖位转折期 ,主茎 3蘖位为第 1蘖位转折点 ,主茎N蘖位为第 2蘖位转折点 ;在主茎 1～N -1蘖位中 ,在水稻具有n - 3的叶、蘖同伸规律的同时 ,主茎n蘖位上一次分蘖与主茎n - 2蘖位下一次分蘖还具有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 ;最优蘖位形成的规律是 :在所有同次分蘖中 ,N - 1和N - 2蘖位 1次分蘖生产潜力最大 ,N - 3和N - 4蘖位 2次分蘖生产潜力最大 ,N - 5和N - 6蘖位 3次分蘖生产潜力最大 ;合理利用强优势中位蘖具有
The paper studies tiller regularity and productive forces of rice with main stem and different tilleres of 1～4 grade tillering of rice variety Jijing 14. The result showed that there were two tiller turning point on the main stem of middle or late rice variety: 3 tillering part of main stem was the first tiller turning point;N tillering part was the second tillering turning point.In the 1～N-1 tillering part of main stem,rice had a stretching regularing of n-3 leave and n-3 tillering,and at the same time the upper tillering on main stem n tillering part and below tillering on main stem n-2 tillering part still had a stretching regularing of n-2 tillering and tillering. It was that main stem growed two leaves at vertical that tillering increased one grade at crosswise. The regularity of forming the best tillering part was that; in all the same grade tillering ,the first grade tillering of N-1 and N-2 tillering part had the biggest potenttial of production; the second grade tillering of N-3 and N-4 tillering part had the biggest potenttial of production; the third grade tillering of N-5 and N-6 tillering part had the biggest potenttial of production. The superiority of the middle tiller was utilized rationally and there was 18% potential of increase yield.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
2000年第3期12-15,共4页
Journal of Hebei Agricultural University
基金
河北省自然科学基金!(3995 0 4)
关键词
水稻
分蘖规律
生产力
增产潜力
rice
tillering regularity
productive force
potential of increase yield
