化控剂对小麦矮抗58农艺和产量性状的影响

Effect of Chemical Control on Agronomic and Yield Characters of AK58 Wheat

以矮抗58为试验对象,选择3种不同化控剂为试验处理,研究了化控剂对小麦主要农艺和产量性状的影响。试验结果表明,喷施化控剂多效唑、吨田宝和赤霉素能有效抑制小麦株高,增加了小麦穗粒数和千粒重,产量增幅3.6%~9.8%。其中,在小麦拔节期喷施多效唑能显著降低小麦的株高;开花期喷施一定浓度吨田宝可以缩短基部节间长度,延长穗下节间长度,为提高旗叶的光合速率奠定了基础。在小麦灌浆期喷施一定浓度的赤霉素显著提高了千粒重和产量,而多效唑处理不显著。方差分析结果表明,在3种化控剂间小麦的穗粒数、结实小穗数与产量的差异显著,而不孕小穗数、千粒重则无显著性差异。

Using AK 58 as test material and three different chemical control agents for treatments, effect ofchemical control agents on main agronomic traits and yield of wheat was studied. Results showed that spraying of Pa-clobutrazol, Duntianbao and Gibberellin effectively inhibited wheat plant height. Number of grain per ear and 1000-grains weight increased, and yield increased by 3.6%~9.8%. Among them, spraying Paclobutrazol at jointing stagesignificantly reduced the plant height of wheat, spraying Duntianbao at flowering period shortened the basal inter-node length, extended internode length below the ear, this laid basis for the increase of photosynthetic rate of flagleaf. Spraying gibberellin at a certain concentration at wheat filling stage significantly increased 1000-grains weightand yield, while effect of Paclobutrazol was not significant. Variance analysis results showed that number of grainper ear, spikelet number and yield differed significantly among the three kinds of control agents, while infertilityspikelet and 1000-grains weight showed no significant difference.