Productivity of upland rice in function of the different doses and application times poultry litter, in organic system.

Abstract

The production of upland rice in organic system constitutes an alternative for the family farming in the State of Santa Catarina, both for the production of healthy food and for the commercialization of the surplus. The viability of cultivation is favored by the use of local varieties adapted to region of cultivation and which demand from few external agricultural inputs the rural property. Based on this, the objective of this study was to evaluate the upland rice crop performance with the use of different doses of poultry applied different times in organic farming system in 2014/15, 2015/16 and 2016/17 seasons. The experiment was conducted in a randomized block with 7 treatments: (0 Mg ha-1 (witness), 2 Mg ha^-1 on winter crops (CI); 4 Mg ha^-1 on CI; 8 Mg ha^-1 on CI; 2 Mg ha^-1, ½ dose on IC and ½ dose on rice; 4 Mg ha^-1, ½ dose on IC and ½ dose on rice; 8 Mg ha^-1, ½ dose on IC and ½ dose on rice). The most efficient and economical treatment for productivity was the use of 4 Mg ha^-1 of poultry bed in single application on the winter crop, 40 days after emergence of rice. The yield components showed a direct relationship with productivity, and these are important when choosing local varieties for organic cultivation. The productivity in the different seasons was influenced by the climatic conditions, mainly by the minimum temperature occurred in the reproductive phase.