多效唑（PP333)对花生农艺性状及产量的影响

大田试验研究了喷施75-100 mg／l的不同浓度多效唑处理对花生农艺性状及产量影响，表明花生初花后26天喷施多效唑对花生的生物（鲜）重、豆荚（鲜）重、株高等农艺性状有显著的影响。收获时花生鲜果重与植株生物量鲜重的直线回归方程相关性分别为：多效唑：y=0.0240+0.3919x（r=0.0402），对照：y=0.2587+0.2680x（r=0.0485）；株高与生物量相关性分别为：对照y=0.0426+0.8411x(r=0.0070)；多效唑：y= -0.1126+9.4824x(r= -0.0045)；从对照（CK）与喷施多效唑100 mg／l处理组相比，结实率从40%提高到63%，有效荚由9.00±3.62个/科增加至21.33±2.84个/科，理论产量由347.22±86.82 kg/666.7m2增加到723.08±76.38 kg/666.7m2，差异极显著。结果表明，所有施用多效唑的处理均促进干物质向荚果分配，使单株结果数及产量显著增加，而且具有明显的浓度效应。

Effects of Paclobutrazol on Agronomical Characteristics and Its Yields of Peanut

Field trials were carried out to investigate the effect of applied different concentration paclobutrazol on the growth, dry matter production in peanut in a subtropical region of south China. The paclobutrazol solutions were applied at full flowering stage of peanut. The results indicated that when 75-100 mg/L paclobutrazol was applied at blossoming stage, the growth of the main stems and branch stem were significantly inhibited, the amount of legume per plant and percentage of full legume were increased, and the peanut yield was also increased. Most of the growth parameters studied was affected by the concentration of paclobutrazol application. When the concentration of spraying paclobutrazol was increase among 0-100 mg？L-1, it would result in the significant increase of the peanut yield. The correlation analysis showed that the linear relationship between biomass and the pod yield were PP333：y=0.0240＋0.3919x（r=0.0402）,CK：y=0.2587＋0.2680x（r=0.0485）. The relationship between the plant height and the fresh biomass were CK：y=0.0426＋0.8411x（r=0.0070）, PP333y= -0.1126＋9.4824x（r= -0.0045）. The experimental results demonstrate that spraying paclobutrazol more favoured the Peanut yield compared to CK, with seed-setting rate increase from 40% to 63%,the rate of plump pod increase from 9.00±3.62 to 21.33±2.84 per ,and the theoretical yields increase from 347.22±86.82 kg/666.7m2 to 723.08±76.38 kg/666.7m2,significant difference of the contro1. Thus the yield was greatly improved by spraying paclobutrazol with 75-100 mg/l PP333.