Resources › Field studies › Fiber crops › Cotton (Sinop, MT, Brazil)

Cotton (Sinop, MT – Brazil)

Research institution: NEMABIO, Agronomic Research
Researcher: Dr. Claudinei Kappes
Date: 2022/23 and 2023/24
Location: Sinop, MT – Brazil
Crop variety: TMG 44 B2RF
Soil: Dystrophic Red-Yellow Latosol (Oxisol) containing clay (49.8%), sand (32.5%), and silt (17.7%)
Soil pH: 5.7 (CaCl₂)
Additional soil information: OM 24.3 g/dm³; P 28.9 mg/dm³; K 91.6 mg/dm³ S 25 mg/dm³; Ca 4.1 cmol_c/dm³; Mg 1.6 cmol_c/dm³; B 0.23 mg/dm³; Cu 0.5 mg/dm³; Mn 0.5 mg/dm³; Zn 3.4 mg/dm³; Fe 60 mg/dm³
Fertilizers used in two trials:
- Granubor^®, Solubor^® Flow ⁺K, and liquid 10% B (boric acid + monoethanolamine)
- Granubor and acidulated ulexite
Trial design: Randomized complete block with four repetitions
Metrics: Yield (kg/ha), B content in the leaves, and B content in the soil (after harvest). Plant stand evaluation to ensure consistent stand in each replication

Given the soil and climate conditions of this study, the results obtained allowed us to conclude that:

In the first year of the study, the application of Solubor Flow ⁺K at its highest dose (equivalent to 0.9 kg/ha B), divided into five times, provided higher potassium and boron levels during bloom and boll development
In the second year, all treatments that received reapplications of boron were efficient in increasing the number of bolls per plant and the boron levels in the leaf and soil
In the two consecutive years, the seed cotton yields obtained with the foliar applications of Solubor Flow ⁺K were statistically similar to those provided by boron MEA.

The application of 3.0 kg/ha of boron broadcast at the time of sowing in soil with low availability of the element, provided a higher yield of seed cotton, whose percentage increase was 5.28% in comparison to the control treatment (increase of 267.9 kg/ha).
Applications of increasing doses of boron linearly increased the content of the element in the leaf and soil, the lowest values were verified in the control, which did not receive an application of boron.

Manage Consent Preferences