杂交早稻威优35栽培因子的多项式回归分析

采用二次回归通用旋转组合设计,研究了秧田播种量、栽插谷粒数(即插秧株数)及施肥量三因素与杂交早稻威优35产量的回归关系。结果表明,秧田播种量与产量呈负向直线关系,以每公顷播150kg 的产量最高;播450kg 的产量最低。低肥条件下,增加插秧株数可显著增产;高肥条件下,产量随插秧株数的增加而下降。其数学模型是 y=6198.15-23.678x_1+22.869x_2-39.875x_2x_3-23.853x_2~2-33.221x_3~2。

POLYNOMIAL REGRESSION ANALYSIS OF CULTURAL FACTORS OF EARLY HYARID RICE WEIYOU—35

The regressions of three cultural factors i.e.sowing norms of seedling bed,seedling numbers and application rates of fertilizers on the yields of the early hybrid rice Weiyou-35 were studied by using the com- mon quadratic regress rotational combination designs.The results showed that the negative linear correlation was significant between the yields and sowing norms of seedling bed.The highest yield was abtained when sowing norm was 150 kg per ha,while the yield was lowest when sowing norm was 450 kg per ha.The yield increased significantly as seedling numbers increased under low fertilizer level,while the yield decreased as seedling numbers increased under high fertilizer level.Its mathematical model was y=6198.15-23.678x_1+22.869x_2-39.875x_2x_3-23.853x_2~2-33.221x_3~2.