Work

Efficacy of growth regulators in a lodging-sensitive wheat cultivar: grain yield, crop economic profitability and flour industrial quality

Year: 2023

Type: article

Abstract: Growth regulators in annual crops such as wheat are being used for reducing plant lodging. Thus, this study aimed to assess the effects of applying different growth regulators on grain yield, industrial quality of flour, and the economic viability of a lodging-sensitive wheat cultivar, namely TBIO-Pioneiro. The RDB experimental design consisted of five treatments and nine replicates. The treatments used the following regulators: trinexapac-ethyl (T1), ethephon (T2), prohexadione calcium (T3), chlormequat chloride (T4) and a control (untreated) (T5). The rates were determined according to the manufacturer’s recommendations for other crops. Plant height was reduced with application of regulators, for example, trinexapac (93.1 cm), and control (100.7 cm). This same growth regulator tested increased TGW (36.2 g) over the control (33.6 g) making plant lodging lowest (from 34%-control to about 10%-treated). Grain yields with application of growth regulators were higher than control (3.1 t ha-1), ranging from 148.9 to 158.9% (means regulator-treated of 4.8 t ha-1). Regarding grain alveograph indices, there was an increase in gluten strength (W) with the use of ethephon (309 10-4J), prohexadione (309.3 10-4J), and chlormequat (309 10-4J), compared with control (240.3 10-4J). The economic return on investment was higher than the control, of up to 35.7%. It is concluded that application of prohexadione, ethephon and chlormequat changes the gluten strength of wheat grains and that the growth regulators tested are efficient in controlling lodging, reducing plant height and increasing grain yields, thus providing productive stability and higher financial returns in wheat cropping.

Source: Australian Journal of Crop Science

DOI: 10.21475/ajcs.23.17.01.p3723

Authors: Camila Cigel, Clovis Arruda Souza, Gesieli Priscila Buba, Guilherme Kender Drösemeyer, Lucas Grillo Oliveira

Institution: Universidade do Estado de Santa Catarina

Language: English

Topic: Crop Yield and Soil Fertility

Subfield: Agronomy and Crop Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Zero hunger

Open Access status: diamond

Funders: Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Fundação de Amparo à Pesquisa e Inovação do Estado de Santa Catarina, Universidade do Estado de Santa Catarina