Preparo do solo, irrigação por aspersão e rendimento de engenho do arroz de terras altas

Abstract

The mill revenue obtained after industrial rice processing is an important parameter for the comercialization of rice and it can be influenced by management pratices accomplished during cultivation. To evaluate the hulling yield, undamaged grains and broken grains of three dryland rice cultivars were studied in relation to soil preparation and sprinkler irrigation. A field experiment was carried out in Selvíria, MS, Brazil on a Typic Haplustox. Treatments consisted of the combination of the three cultivars of dryland rice (IAC 201, Carajás and Guarani), with three soil preparation systems (aiveca plow + leveling bars, scared + leveling bars and heavy bars + leveling bars) and three sprinkler irrigation levels (dry and two depths of water), with four replications. The IAC 201 cultivar presented a larger hulling yield and Carajás stands out for undamaged grains; the different systems of soil preparation did not interfere in the hulling yield; sprinkler irrigation increases hulling yield, and undamaged grains, mainly in years with dry periods.