【Objective】The aim of this experiment was to study the growth and yield of Chinese hybrid rice va... more 【Objective】The aim of this experiment was to study the growth and yield of Chinese hybrid rice varie-
ties planted in Battambang， Cambodia and to provide reference for their extension and application in Cambodia. 【Method】The experiment was conducted in the dry season of 2012 （January-April）. Three Chinese rice varieties viz.， Zaoyou362， Teyou362， Guiyuanyou362 and one local variety （Senpidao） were planted in Battambag， Cambodia to compare their agronomic traits and yield. 【Result】There was significant difference in plant height among all rice varieties. Senpidao grew shorter than the other varieties， but its tiller number was higher than the hybrid rice varieties. Grains per panicle and panicle length of the hybrid rice were significantly higher than that of Senpidao and Teyou362 and Guiyuanyou362 showed the highest grains per panicle and panicle length， respectively. The 1000-grain weight of Zaoyou362 was higher than that of Teyou362， Guiyuanyou362 and Senpidao. The yields of Teyou362 and Guiyuanyou362 were significantly higher than both of Zaoyou362 and Senpidao. Furthermore， the grains per panicle and panicle length were significantly correlated with the yield of rice. 【Conclusion】Three Chinese hybrid rice varieties were suitable for growing in Cambodia and their yields increased by 23-38% as compared to Senpidao rice under Toul Samrong soil condition in dry season of Battambag， Cambodia.
In order to improve the quality of in vitro Dendrobium plantlets for transplantation, the effect ... more In order to improve the quality of in vitro Dendrobium plantlets for transplantation, the effect of photosynthetic photon flux (PPF) and supporting material on growth and development were studied. The in vitro derived shoots each with 3-4 expanded leaves were cultured on Vacin and Went medium without sucrose using 2.4 g l-1 phytagel or 15 g per bottle vermiculite as supporting material. The shoots cultured using phytagel and vermiculite were then incubated in plant growth chambers under 50 µmol m-2s-1 or 150 µmol m-2 s-1 PPF for 30 days. The other two treatments were provided as follows: the shoot cultured in the medium supplemented with 2.4 g l-1 phytagel with 20 g l-1 sucrose under 50 µmol m-2 s-1PPF or under 150 µmol m-2 s-1 PPF.
Sugar free media significantly promoted the growth and development of plantlets (total fresh and dry weight, root length, number of leaves). The plantlet growth could be improved by using vermiculite or phytagel as a supporting material in sugar free medium under 150 µmol m-2 s-1 PPF.
【Objective】The aim of this experiment was to study the growth and yield of Chinese hybrid rice va... more 【Objective】The aim of this experiment was to study the growth and yield of Chinese hybrid rice varie-
ties planted in Battambang， Cambodia and to provide reference for their extension and application in Cambodia. 【Method】The experiment was conducted in the dry season of 2012 （January-April）. Three Chinese rice varieties viz.， Zaoyou362， Teyou362， Guiyuanyou362 and one local variety （Senpidao） were planted in Battambag， Cambodia to compare their agronomic traits and yield. 【Result】There was significant difference in plant height among all rice varieties. Senpidao grew shorter than the other varieties， but its tiller number was higher than the hybrid rice varieties. Grains per panicle and panicle length of the hybrid rice were significantly higher than that of Senpidao and Teyou362 and Guiyuanyou362 showed the highest grains per panicle and panicle length， respectively. The 1000-grain weight of Zaoyou362 was higher than that of Teyou362， Guiyuanyou362 and Senpidao. The yields of Teyou362 and Guiyuanyou362 were significantly higher than both of Zaoyou362 and Senpidao. Furthermore， the grains per panicle and panicle length were significantly correlated with the yield of rice. 【Conclusion】Three Chinese hybrid rice varieties were suitable for growing in Cambodia and their yields increased by 23-38% as compared to Senpidao rice under Toul Samrong soil condition in dry season of Battambag， Cambodia.
In order to improve the quality of in vitro Dendrobium plantlets for transplantation, the effect ... more In order to improve the quality of in vitro Dendrobium plantlets for transplantation, the effect of photosynthetic photon flux (PPF) and supporting material on growth and development were studied. The in vitro derived shoots each with 3-4 expanded leaves were cultured on Vacin and Went medium without sucrose using 2.4 g l-1 phytagel or 15 g per bottle vermiculite as supporting material. The shoots cultured using phytagel and vermiculite were then incubated in plant growth chambers under 50 µmol m-2s-1 or 150 µmol m-2 s-1 PPF for 30 days. The other two treatments were provided as follows: the shoot cultured in the medium supplemented with 2.4 g l-1 phytagel with 20 g l-1 sucrose under 50 µmol m-2 s-1PPF or under 150 µmol m-2 s-1 PPF.
Sugar free media significantly promoted the growth and development of plantlets (total fresh and dry weight, root length, number of leaves). The plantlet growth could be improved by using vermiculite or phytagel as a supporting material in sugar free medium under 150 µmol m-2 s-1 PPF.
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ties planted in Battambang， Cambodia and to provide reference for their extension and application in Cambodia. 【Method】The experiment was conducted in the dry season of 2012 （January-April）. Three Chinese rice varieties viz.， Zaoyou362， Teyou362， Guiyuanyou362 and one local variety （Senpidao） were planted in Battambag， Cambodia to compare their agronomic traits and yield. 【Result】There was significant difference in plant height among all rice varieties. Senpidao grew shorter than the other varieties， but its tiller number was higher than the hybrid rice varieties. Grains per panicle and panicle length of the hybrid rice were significantly higher than that of Senpidao and Teyou362 and Guiyuanyou362 showed the highest grains per panicle and panicle length， respectively. The 1000-grain weight of Zaoyou362 was higher than that of Teyou362， Guiyuanyou362 and Senpidao. The yields of Teyou362 and Guiyuanyou362 were significantly higher than both of Zaoyou362 and Senpidao. Furthermore， the grains per panicle and panicle length were significantly correlated with the yield of rice. 【Conclusion】Three Chinese hybrid rice varieties were suitable for growing in Cambodia and their yields increased by 23-38% as compared to Senpidao rice under Toul Samrong soil condition in dry season of Battambag， Cambodia.
Sugar free media significantly promoted the growth and development of plantlets (total fresh and dry weight, root length, number of leaves). The plantlet growth could be improved by using vermiculite or phytagel as a supporting material in sugar free medium under 150 µmol m-2 s-1 PPF.
ties planted in Battambang， Cambodia and to provide reference for their extension and application in Cambodia. 【Method】The experiment was conducted in the dry season of 2012 （January-April）. Three Chinese rice varieties viz.， Zaoyou362， Teyou362， Guiyuanyou362 and one local variety （Senpidao） were planted in Battambag， Cambodia to compare their agronomic traits and yield. 【Result】There was significant difference in plant height among all rice varieties. Senpidao grew shorter than the other varieties， but its tiller number was higher than the hybrid rice varieties. Grains per panicle and panicle length of the hybrid rice were significantly higher than that of Senpidao and Teyou362 and Guiyuanyou362 showed the highest grains per panicle and panicle length， respectively. The 1000-grain weight of Zaoyou362 was higher than that of Teyou362， Guiyuanyou362 and Senpidao. The yields of Teyou362 and Guiyuanyou362 were significantly higher than both of Zaoyou362 and Senpidao. Furthermore， the grains per panicle and panicle length were significantly correlated with the yield of rice. 【Conclusion】Three Chinese hybrid rice varieties were suitable for growing in Cambodia and their yields increased by 23-38% as compared to Senpidao rice under Toul Samrong soil condition in dry season of Battambag， Cambodia.
Sugar free media significantly promoted the growth and development of plantlets (total fresh and dry weight, root length, number of leaves). The plantlet growth could be improved by using vermiculite or phytagel as a supporting material in sugar free medium under 150 µmol m-2 s-1 PPF.