【摘要】 以籼粳杂交组合亚优２号为供试材料，采用盆钵与大田试验相结合，研究了１２种植物生长调节剂对亚优２号的农艺性状及产量的影响。研究结果表明，适时适量地使用植物生长调节剂能改善籼粳交Ｆ１的农艺性状，提高结实率。更多还原

【Abstract】 plant growth regulators were studied in their effects on agronomic traits and grain yield by using Yayou 2,an indica-japonica F1 hybrid,as the experimental material.The results showed that PP333 applied at the second leaf stage,CCC and Pix at the initial tillering stage, Na2B4O7,rare earth ( RRE ),Guangpu Zenchanjun (GPZCJ ),TRLA,Guangzensu 802(802 )and NaHSO3 applied at the stages of initial tillering and heading had a significant yield-increasing effect at 1%level;GA3 and 2.4-D applied at the stages of tillering and heading significant at 5%level;NAA sprayed at the stages of initial tillering and head- ing,PP333 at the initial tillering stage had no signifcant effects; PP333 applied at the shooting stage had a significant yield-decreasing effect at 1% level.Therefore,the application of plant growth regulators at proper growing periods with appropriate dosages can improve agronomic traits and increase seed set,result- ing in a higher yield of the indica-japonica rice hybrid.更多还原