Effects of No-tillage Rice Cover Crop Cropping Systems on Rice Root Growth
2011
Son, Daniel, Gyeongnam National University of Science and Technology, Jinju, Republic of Korea | Lee, Y.H., Gyeongsangnam-do Agricultural Research and Extension Services, Jinju, Republic of Korea
This study was conducted to evaluate the effect of rice cover crop cropping systems on rice root growth in a rice field as affected by conventional tillage without rice straw or green manure crop treatment (CTFS, check plot), no-tillage without cover crops (NTNT), no-tillage amended with rape (NTRA), no-tillage amended with rye (NTRY), no-tillage amended with hairyvetch (NTHV), and no-tillage amended with Chinese milk vetch (NTCM). In 0-5 cm soil depth, dry weight of root in NTRS (128 g m-²) was significantly higher than in the other plots (p less than 0.05) at harvesting stage. In addition, content of active organic matter at 0-5 cm soil depth was 1,684 g m-² in NTCM, 1,309 g m-² in NTRA, 1,295 g m-² in NTRS, 1,072 g m-² in NTRY, 917 g m-² in NTHV, 434 g m-² CTFS, and 426 g m-² in NTNT treatment. In no-tillage rice cover crop cropping system, our findings suggest that NTRS and NTCM should be enhanced root growth and active organic matter in paddy field.
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