Abstract

BAEZ-PEREZ, Aurelio et al. Effect of the application of indole-3-butyric acid in production and quality of wheat (Triticum estivum L.). Rev. Mex. Cienc. Agríc [online]. 2015, vol.6, n.3, pp.523-537. ISSN 2007-0934.

Indole-3-butyric acid (AIB) is growth a promoter of lateral roots from plants, dose and time of application are critical to stimulate rooting. Two trials to evaluate the effect of AIB in the production and quality of wheat were established. The first trial in pots, and evaluated five increasing doses of this growth regulator: 0, 3, 4.5, 6.0 and 7.5 g ha^-1. Evaluated: root volume at 27, 40 and 53 days after plant emergence (DDE), dry matter accumulation and assimilation of N, P and K. On the second experiment under field conditions was established the following treatments: without application of AIB (T1), with application of 9 g ha^-1 AIB at 28 DDE (T2), with 9 g ha^-1 AIB at 55 days DDE (T3), with 9 g ha^-1 AIB at 28 DDE plus 9 g ha^-1 at 55 DDE (T4). Evaluated: N, P and K content in flag leaf, yield components and grain quality; in the first experiment was observed that treatment with AIB application had greater root volume and root weight and aerial parts; however, this trend was not significant (p≤ 0.05), as well as the content of N, P and K. Grain weight and 100 grain weight had significant differences (p≤ 0.05) by the application of AIB and these were 14 and 9% higher (p≤ 0.05), compared to the control treatment. Field experiment had significant differences by the application of AIB in grain production. T2 with the highest yield, 5.2 t ha^-1 was 13% higher than T1. The hectolitre weight, physical parameter of grain quality, had its highest value in T3, with 0.76, which corresponds to the best grain quality, according to the Official Mexican Standard on quality of non-industrialized food products in wheat.

Keywords : cereal; crop management; growth regulator.

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