生长调节剂对紫花苜蓿种子产量及产量构成要素的影响

Effect of growth regulator on seed yield and yield components of alfalfa

以中苜2号紫花苜蓿Medicago sativa为研究对象,于2008年3-10月在内蒙古乌海市进行了生长调节剂对紫花苜蓿种子产量及牧草产量构成要素的影响研究。试验选择了乙烯利、多效唑和萘乙酸3种生长调节剂,每种生长调节剂设4个质量浓度梯度,采用随机区组设计,重复3次,研究结果表明:乙烯利、多效唑处理增加了紫花苜蓿单位面积花序数,单位面积结荚花序数和每花序荚果数。萘乙酸增加了平均种子单粒质量。乙烯利处理为2.0 kg/hm2时,获得潜在种子产量最大,为2 243.68 kg/hm2,增产72%;多效唑处理为0.8 kg/hm2时,获得的潜在种子产量最大,为1 675.71 kg/hm2,增产28.6%;萘乙酸处理为0.08kg/hm2时,获得的平均种子单粒质量最大,为2.35 mg。

Effect of growth regulator on seed yield and yield components of alfalfa was studied in Inner Mongolia from March to October 2004 with random block experiment design. The ethephon, paelobutrazol and NAA were used as growth regulators with 4 concentration treatments for each regulator. The results showed that ethephon and NAA increased the number of infloreseenee per unit area, number of pod-setting inflorescence per unit area and number of pods per inflorescence. NAA inereased mean single seed weight. The highest potential seed yield could reach 2 243.68 kg/hm2 and was increased by 72% while the concentration of ethephon was 2.0 kg/hm2. The highest potential seed yield could reach 1 675.71 kg/hm2 and was increased by 28.6 % whole the eoneentration of pa- elobutrazo was 0.8 kg/hm2. The highest average weight of single seed eould reaeh 2.35 mg while the concentration of NAA was 0.08 kg/hm2.