Compactação sobre o sulco de plantio e tratamento de sementes na produtividade do arroz de terras altas
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2018
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This study aimed to determine the effect of compaction on sowing furrow and seed treatment on grain yield of upland rice cultivated under no-tillage system (NTS). Four experiments were carried out; the first and the third one in Urochloa brizantha pasture area, the second one in soybean area and the fourth one in Urochloa decumbens pasture area. In the first and second experiments, three compaction pressures on the sowing furrow, in the design of randomized blocks with six replications, were compared. In the third and fourth experiments, three compaction pressures on the sowing furrow and two seed treatments, in a randomized block factorial (3x2) with six repetitions in the third one and 12 in the fourth one, were compared. In the first experiment, the compaction pressures were 25 kPa, 42 kPa, and 228 kPa and, in the three others, the pressure of 228 kPa was replaced by 340 kPa. The seed treatments were: T0 - without treatment and T1 - fipronil + pyraclostrobin + thiophanate methyl. The compaction on the sowing furrow up to 340 kPa linearly increased rice grain yield. Seed treatment resulted in higher yields of rice grown in the NTS on Urochloa straw. Based on the results, it was concluded that soil compaction on the sowing furrow up to 340 kPa and seed treatment were important practices to provide significant increases in grain yield of upland rice.
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Oryza sativa, Plantio direto, Palhada de braquiária, No-tillage, Urochloa straw
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PINHEIRO, Veneraldo; NASCENTE, Adriano Stephan; STONE, Luis Fernando. Compactação sobre o sulco de plantio e tratamento de sementes na produtividade do arroz de terras altas. Agrarian, Dourados, v. 11, n. 39, p. 6-13, 2018. DOI: 10.30612/agrarian.v11i39.5267. Disponível em: https://ojs.ufgd.edu.br/agrarian/article/view/5267. Acesso em: 12 dez. 2024.