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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。
Aimed at low resistance to 58, three kinds of chemical control agents were selected as experimental treatments to study the effects of chemical control agents on the main agronomic and yield characters of wheat. The results showed that spraying paclobutrazol, tiantianbao and gibberellin could effectively restrain the plant height of wheat and increase the number of grains per spike and 1000-grain weight of wheat, with the yield increasing by 3.6% -9.8%. The application of paclobutrazol (PP333) at the jointing stage of wheat significantly reduced the plant height of wheat. Spraying a certain concentration of tiantianbao at the flowering stage could shorten the length of the basal internode and prolong the internode length of the ear, laying a foundation for increasing the photosynthetic rate of the flag leaf . Spraying a certain concentration of gibberellin at grain filling stage significantly increased grain weight and grain yield, while paclobutrazol treatment was not significant. Analysis of variance showed that there was significant difference between the number of spikelets per plant and the number of spikelets per plant among the three chemical control agents, while the number of spikelets and thousand-kernel weight did not show significant difference.