Topdressing nitrogen fertilization associated with trinexapac-ethyl on industrial quality of oat grains

Abstract

Topdressing nitrogen fertilization associated with trinexapac-ethyl on industrial quality of oat grainsNitrogen fertilization, besides increasing productivity, can favor the production of well-formed, large, and heavy grains, which are traits valued by the oat processing industry. However, high nitrogen (N) doses may lead to plant lodging, which could be solved by using growth retardant. This study aimed to evaluate the industrial quality of white oat grains cultivated under different nitrogen doses and associated with the growth retardant trinexapac-ethyl in two growing environments. Experiments were conducted in Londrina and Mauá da Serra, PR, Brazil, using the cultivar IPR Afrodite in a randomized block design in a 4 × 2 factorial scheme and four replications. Treatments consisted of four topdressing N doses (0, 30, 60, and 90 kg ha -1 ) and the application or not of growth retardant. Thousand-grain weight, hectoliter weight, grain index greater than two millimeters, peeling index, and industrial grain yield were evaluated. The effect of N fertilization and growth retardant on the industrial quality of white oat grains depends on the characteristics of the growing environment. The trinexapac-ethyl application reduces grain quality in Londrina and Mauá da Serra. However, the industrial quality of grains is high in both growing environments when the growth retardant is associated with nitrogen doses.

Technological quality of wheat grains and flour as affected by nitrogen fertilization and weather condition

“…Furthermore, the positive response of flour extraction to increased N rates applied to wheat crop in L rainfed may be attributed to the higher amount of N taken up by plants and mobilized to the grain-filling physiological process. According to Bazzo et al (2021), the higher N supply through fertilization favors grain development, especially concerning the endosperm -a tissue rich in starch -from which is extracted and produced wheat flour.…”

Seletividade de herbicidas pós-emergentes isolados ou associados a fertilizante foliar na cultura da soja

“…The cuticle or stomata can absorb foliar fertilizers, and the absorption process can be influenced by several factors such as plant stage, root volume, and nutrient doses (FAGAN et al 2016). However, nutrient translocation applied through leaves can be reduced, while the absorption of nutrients directly from the soil is greater because of the high volume of roots (BAZZO et al 2021). Another factor that affects the agronomic performance of the soybean crop, as well as the yield and quality of the grains, is the presence of weeds, which compete with the crop and cause a decrease in the availability of resources such as light, water, space, and nutrients (FORTE et al 2017).…”