DRY SOIL MULCHING IN TROPICAL RICE

概要

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Soil moisture was conserved through the dry season (January to April) by generation of a soil mulch after the end of the previous wet season. Soil moisture tension under the dry soil mulch did not exceed 0.3 bar at a 15-cm depth, whereas under a weedy fallow the tension rose to 5 bars. With a weed-free fallow the tension reached 3 bars at the same depth. Land preparation at the end of the previous wet season enabled crop establishment 3 weeks earlier than by preparation at the beginning of the following wet season. Up to 6 weeks of potential growing time was lost when the rice crop was transplanted. It was concluded that in regions with a distinct dry season a dry soil mulch would be a valuable cultural practice for securing an early establishment of the dry-seeded rice crop.
社団法人日本土壌肥料学会の論文