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Impacts of Planting Density on Nutrients Uptake by System of Rice Intensification under No-tillage Paddy in Korea

- 발행기관 한국토양비료학회
- 발행정보 한국토양비료학회지 , 44 권 , 1 호 , Startpage 98 , Endpage 103 , Totalpage 6
- 저자 ( Vannak Meas ) , ( Daniel Shon ) , ( Young Han Lee )
- 가격 3,500 원
- 발행년도 2011
- 주제키워드 System of rice intensification, Rice, No-till, Planting density, Nutrient uptake
- 초록
The System of Rice Intensification (SRI) is a new concept of increasing the yield of rice produced in farming. Therefore, we investigated the impacts of planting density on nutrient uptake as affected by SRI under no-till cropping system. The field was prepared as a randomized complete block design with three treatments: 10×10 cm, 20×20 cm and 30×30 cm planting densities. The root dry mass was significantly increased in the wider planting densities (p<0.05%). The highest grain yield was obtained in 20×20 cm planting density plot (p<0.05%) due to higher plant density per unit area and spikelets number per panicle. The total uptake amounts by rice plant were significantly higher in 20×20 cm planting density plot as 94.8 kg ha-1 for T-N and 29.9 kg ha-1 for P than other planting densities plots, but K and Mg uptake were significantly higher in 10×10 cm planting density plot (p<0.05%). In this study, our findings suggest that SRI should be considered as a new practice for the rice productivity.

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