As new wheat cultivars (Triticum aestivum L.) continue to be developed, they enable cultivation in regions experiencing tropical types of climate under conditions of irrigation. However, further studies are necessary to provide details regarding the properties of the nutrients and their behavior under these conditions to advance the plant growth. Therefore, this study aimed at assessing the development of the irrigated wheat in Oxisol, using combined doses of nitrogen and potassium. These fertilizers are added in the tropical areas as a viable alternative to expand the wheat cultivable regions. Adopting the completely randomized block design, the experiment was conducted for two consecutive years in the State of Mato Grosso, Brazil. Five nitrogen doses (0, 70, 140, 210, 280 kg ha -1), using urea as the fertilizer, and five potassium doses (0, 50, 100, 150 and 200 kg ha -1), using Simple superphosphate as the fertilizer were employed with four replicates. Using the conventional spraying irrigation method, the plant height, number of leaves and tillers, plant lodging and chlorophyll index were assessed. The nitrogen and potassium doses were observed to influence the irrigated BRS 254 wheat in terms of the growth and chlorophyll levels. Potassium expressed the best results for the variables of this study when added alone. The addition of nitrogen demonstrated remarkable results during the second agricultural year.
This study aimed at assessing the effects of nitrogen-potassium interaction on dry matter and grain yield of irrigated wheat (Triticum aestivum L.) grown in the Brazilian Cerrado. The experiment was conducted for two consecutive cropping seasons (2014 and 2015), between March and August. The experiment was arranged in a randomized block design. Treatments consisted of five nitrogen and five potassium doses in a factorial scheme (5×5). The analyzed variables consisted of the shoot and spike dry weights, and grain yield. In both years (2014 and 2015), isolated effects of nitrogen and potassium doses were observed on the assessed traits. In 2014, the highest results were achieved by the respective nitrogen and potassium doses: 145.02 and 148.32 kg ha -1 for shoot dry weight, 133.79 and 139.85 kg ha -1 for spikes, and 119.14 and 138.83 kg ha -1 for grain yield. Yet in 2015, no significant results were identified, while nitrogen doses showed a linear effect on shoot and spike dry weights, potassium rates revealed such effect on grain yield. Although nitrogen showed a higher response in terms of dry weight for shoot and spikes, potassium induced the largest increases in productivity. Thus, for greater efficiency of fertilization, a careful analysis of the level of soil fertility, the expected productivity and the technological level employed is necessary. It should be emphasized that the management of fertilization has specificities every year, requiring constant adaptation.Keywords: BRS 254 wheat; Cerrado wheat production; nitrogen-potassium ratio; nitrogen and potassium fertilizations; Triticum aestivum. Abbreviations: ANOVA_variance analysis; CAPES_coordination for improvement of higher education personnel; CEC_cation exchange capacity; CNPq_national council for scientific and technological development; EMBRAPA_brazilian agricultural research company; ET o _reference evapotranspiration; FAO_ food and agriculture organization of the united nations; FAPEMAT_research support foundation of the state of mato grosso; FTE_fritted trace elements; KCL_potassium chloride; O.M._organic matter; SAS_statistical analysis software; SB_sum of bases; SDW_shoot dry weight; SpDW_spike dry weight; V_base saturation; WY_wheat yield;
Nitrogen is a component of proteins contained in grains and potassium an enzymatic activator in nitrate (NO3-) assimilation and contributes to the translocation and storage of plant assimilates. Together they can increase protein contents of wheat grains. This research aimed to evaluate whether the interaction between nitrogen (N) and potassium (K) fertilizations in irrigated wheat in the Cerrado region of the Mato Grosso State increases the content and accumulation of N, K, and protein in wheat grains. The experiment was carried out in the field for two consecutive years (2014 and 2015) in the Federal University of Mato Grosso. It was designed in randomized blocks in 52 fractional factorial, composed of combinations between five doses of each of N and K, 13 treatments combinations in total with four replicates. After harvest, the grains were dried to determine the contents of N, K, and protein. The nitrogen content was influenced by nitrogen doses in both years and the accumulation significantly influenced by the nitrogen and potassium doses with an average increase among the years of 55.29% as a function of the potassium application. Nitrogen influenced the accumulation of potassium only in 2015 with effect for potassium in both years. Although there was no interaction between treatments, the influence of K on N absorption was evident. Contents and accumulations of N and K and the content of protein in wheat grains are influenced by N and K fertilizations.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.