矮壮素与乙烯利对燕麦株高、产量及其构成因素的调节作用

通过在燕麦Avena sativa拔节期喷施1%的矮状素和10%乙烯利,研究生长调节剂对不同燕麦品种株高、节间长度、分蘖成穗、产草量和种子产量等性状的影响.结果表明,矮壮素处理后,燕麦株高比对照降低了10～12 cm;品种4628基部节间受影响最大,矮壮素和乙烯利处理后其倒四节间长度有显著下降,仅为对照的58.2%和64.8%.矮壮素和乙烯利处理下燕麦干草和鲜干比变化也比较大,不同品种对2种调节剂的反应不同.喷施生长调节剂后燕麦成穗有显著增加,但穗长、穗粒数有减少的趋势,对千粒重也有影响;种子产量有所增加.3个品种中以4628进行矮壮素处理的效果较好,有效穗数和产量与对照相比显著增加.

Effects of plant growth regulator on plant height,yield and yield components of oat

Effects of plant growth regulator on plant height and yield formation of oat(Avena sativa) were studied by spraying 1% CCC and 10% Ethephon at stem elongation stage.The result showed that plant height decreased significantly(10 to 20 cm) compared with the control under CCC treatment 4628 reduced internode length by 58.2% and 64.8% under CCC and ETH treatment,respectively.Both regulators significantly increased effective tillers and reduced panicle length and grains per panicle,also had effects on thousand grain weight;grain yield increased.Among 3 varieties,4628 gave the best performance under CCC treatment,its effective tillers and yield increased significantly compared with the control.