Effect of minimun and conventional tillage in rice (Oryza sativa L.) in the Northern Huetar Region in Costa Rica.
DOI:
https://doi.org/10.15517/am.v13i2.12063Abstract
In the north area of Costa Rica two plots were sown: one
of minimum tillage (3 ha), and another of conventional tillage
(0,80 ha). Both tillage systems were planted with a hydraulic
sower fertilizer. The variety of rice used was the CR 2515. In
minimum tillage the sow work was conducted under conditions
of high humidity, job that is practically impossible under
conventional tillage. Under this same tillage system, there was
a lower germination and population of rice plants, mainly in the
areas where there was more stubble. In the planting cycle
2001, the minimum tillage had larger density of Murdania
nudiflora, Echinocloa colonum and Digitaria sp. In
conventional tillage the most prevailing weed was Cyperus
rotundus. The plagues and diseases were not a limiting factor
in the handling of the crop in both tillage systems, however, in
the minimum tillage there were a largger incidence of ants, of
the genus Solenopsis. In the sow 2001 cycle, in conventional
tillage had larger number of panicles /m2> to 20 cm that in
minimum tillage, while in the 2000 cycle in minimum tillage
the quantity of panicles /m2 >20cm was very low. Like wise,
the number of grains per panicle was larger for minimum
tillage in all the panicles lengths, and the weight of 1000 grains
was similar to minimum tillage in all the panicles lengths. The
estimated yield was higher in the system of conventional tillage
with 6.74 t/ha, while in minimum tillage it was of 5.91 t/ha.
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