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对 8 0优 12 18个不同播期进行产量 (y)与有效分蘖 (x1 )、每穗总粒数 (x2 )、结实率 (x3)、千粒重 (x4)间的相关、回归、通径分析 ,结果显示 ,有效分蘖是构成 80优 12 1产量最重要的因素 ,在高产中起着决定性的作用 ,每穗总粒数是构成产量的基础。产量与构成产量因素之间的偏相关系数分别为 0 9849 、0 9784 、0 73 86和 0 95 5 7 。回归方程为y =-2 3 4 9 95 3 +10 0 .45 23x1 +3 8845 7x2 +8 762 62 2x3+3 3 782 19x4,其复相关系数r =0 9982达极显著水平。 4因素对产量的直接贡献率依次为 :有效分蘖 (Py 1 =0 .7867) >每穗总粒数 (Py 2 =0 3 2 0 4) >千粒重 (Py 4 =0 2 3 0 6) >结实率 (Py 3=0 13 3 4 )。并据此总结出 80优 12 1高产优质的栽培措施为早生快发提高有效分蘖和适当早播控制千粒重。
The correlations between yield (y) and effective tiller (x1), total number of grains per panicle (x2), seed setting rate (x3) and 1000-grain weight (x4) The results showed that effective tillering was the most important factor that formed the yield of 80 × 10 1, which played a decisive role in high yield. The total grain number per panicle was the basis of yield. The partial correlation coefficients between yield and yield components were 0 9849, 0 9784, 0 73 86 and 0 95 5 7, respectively. The regression equation was y = -2 3 4 9 95 3 +10 0 .45 23x1 +3 8845 7x2 +8 762 62 2x3 + 3 3 782 19x4, and the complex correlation coefficient r = 0 9982 reached the extremely significant level. The direct contribution rates of four factors to yield were as follows: effective tillers (Py 1 = 0.7867)> total number of grains per panicle (Py 2 = 0 3 2 0 4)> 1000-grain weight (Py 4 = 0 2 3 0 6)> Seed setting rate (Py 3 = 0 13 3 4). Based on this, 80 high yielding and high quality cultivation measures were summarized to improve the effective tillering of early fasting and the proper early sowing control of 1000-grain weight.