摘要
吉８９—４５是我所以吉粳６０号为母本，东北１２５为父本杂交育成的水稻新品种。采用正交旋转组合设计方法，对产量构成因素与产量的关系进行了相关和通径分析，结果表明：单位面积稳数与产量呈极显著正相关，直接通径系数达１．１０４２，其次是每穗粒数，直接通径系数为０．７０１７。而饱满粒率和千粒重对产量的作用不大。因此，在栽培措施上保证穗数的前提下，力争大穗。对吉８９—４５产量构成因素影响最大的栽培措施首先是施氮量，其次是每穴插秧苗数，再次是穗肥比例。
Adopting the or thogonal-gyrating-regression disign, the changing reg ular of yield constitutional factors under defferent condition in Ji 89-45 new variety was examined, and the analisis of relation and passage was on between the yield constitunonal fac tors and yield, the resul t showed:in the yield constitutional factors of Ji 89-45 variety. It was the most importanf that the number of the ears per unit area to the yield. The yield constitutional factors were in direct proportion to yield distinctly. immediate passage coefficient was 1. 1042, the seconel the number of grain per ear was more important to yield. Impediate passage coefficient was 0.7017,and plum peared race of grain or weight of thousand grain were distinctly weak to yield. So trying to add the number of ears was the most important to get a higb yield in cultivation. On the premise of ensuring the number of the ears, try to make big ears.The first the culfuoal measure influencing to the yield constitutional factors of Ji 89-45 variety was the amount of applied fertilizer(N), the second was the transplanting seedlings per hill. The third was the proportion of the fertilizer in eat premordia stage. The influence to the way of transplanting seedlings was meak.
