Effects on Rice Growth of System of Rice Intensification under No-till Paddy in Korea
2011
Meas, Vannak, Gyeongsang National University, Jinju, Republic of Korea | Shon, Daniel, Gyeongsang National University, Jinju, Republic of Korea | Lee, Y.H., Gyeongsangnam-do Agricultural Research and Extension Services, Jinju, Republic of Korea
The objectives of this research were to investigate the system of rice intensification (SRI) on early growth, grain yield, and yield components under Chinese milk vetch residue-mulched no-tillage cropping systems at silt loam soil. The field was prepared as a split-plot design with three replications, main plots consisted of Dongjinbyeo, and Sobibyeo as a cultivar, and subplots consisted of 10×10 cm, 20×20 cm, and 30×30 cm as a planting density. Weed infestation during rice growing season was more severe in wider planting density 30×30 at 35 days after transplanting (DAT), and 20×20 cm at 95 DAT in both Sobibyeo and Dongjinbyeo. The maximum plant height was recorded in Sobibyeo compared with Dongjinbyeo, 10×10 cm and 20×20 cm planting density compared with 30×30 cm from 20 DAT until 60 DAT. Among the three planting densities, SPAD values were significantly greater in planting density of 20×20 cm both in Sobibyeo and Dongjinbyeo followed by 30×30 cm compared with closer planting density of 10×10 cm. The lowest grain yield was observed in wider planting density of 30×30 in both Sobibyeo and Dongjinbyeo due to lower number of panicle per unit area. Our findings suggest that optimum planting density for SRI in no-tillage paddy was 20×20 cm and it should be useful the systems to small-scale rice farmers in Korea as a sustainable farming system.
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by Korea Agricultural Science Digital Library