Effect of minimun and conventional tillage in rice (Oryza sativa L.) in the Northern Huetar Region in Costa Rica.
In the north area of Costa Rica two plots were sown: oneof minimum tillage (3 ha), and another of conventional tillage(0,80 ha). Both tillage systems were planted with a hydraulicsower fertilizer. The variety of rice used was the CR 2515. Inminimum tillage the sow work was conducted under conditions...
|Main Authors:||Rojas, Luis Antonio, Mora, Alexánder, Rodríguez, Harold|
Universidad de Costa Rica
In the north area of Costa Rica two plots were sown: oneof minimum tillage (3 ha), and another of conventional tillage(0,80 ha). Both tillage systems were planted with a hydraulicsower fertilizer. The variety of rice used was the CR 2515. Inminimum tillage the sow work was conducted under conditionsof high humidity, job that is practically impossible underconventional tillage. Under this same tillage system, there wasa lower germination and population of rice plants, mainly in theareas where there was more stubble. In the planting cycle2001, the minimum tillage had larger density of Murdanianudiflora, Echinocloa colonum and Digitaria sp. Inconventional tillage the most prevailing weed was Cyperusrotundus. The plagues and diseases were not a limiting factorin the handling of the crop in both tillage systems, however, inthe minimum tillage there were a largger incidence of ants, ofthe genus Solenopsis. In the sow 2001 cycle, in conventionaltillage had larger number of panicles /m2> to 20 cm that inminimum tillage, while in the 2000 cycle in minimum tillagethe quantity of panicles /m2 >20cm was very low. Like wise,the number of grains per panicle was larger for minimumtillage in all the panicles lengths, and the weight of 1000 grainswas similar to minimum tillage in all the panicles lengths. Theestimated yield was higher in the system of conventional tillagewith 6.74 t/ha, while in minimum tillage it was of 5.91 t/ha.