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Numerical Simulation of Root Growth Dynamics of CO2-Enriched Hybrid Rice Cultivar Shanyou 63 Under Fully Open-Air Field,Conditions 预览

Numerical Simulation of Root Growth Dynamics of CO2-Enriched Hybrid Rice Cultivar Shanyou 63 Under Fully Open-Air Field,Conditions
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摘要 Hybrid indica rice(Oryza sativa L.) cultivars play an important role in rice production system due to its heterosis,resistance to environmental stress,large panicle,and high yield potential.However,no attention has been given to its root growth dynamic responses to rising atmospheric CO2 concentration([CO2 ]) in conjunction with nitrogen(N) availability.Free air CO2 enrichment(FACE) and N have significant effects on rice root growth.In this experiment,a hybrid cultivar Shanyou 63(Oryza sativa L.) was used to study the effects of FACE and N levels on roots growth of rice.The results showed a significant increase in both adventitious root volume(ARV) and adventitious root dry weight(ARD) under the FACE treatment.The application of nitrogen also increased ARV and ARD,but the increase was smaller than that under FACE treatment.On the basis of the FACE experiment,numerical models for rice adventitious root volume and dry weight were built with the time as the driving factor.The models illustrated the dynamic development of rice adventitious root volume and dry weight after transplanting,regulated either by the influence factor of atmospheric [CO2 ] or by N application.The models were successfully used to predict ARV and ARD under FACE treatment in a different year with the predicted data being closely related to the actual experimental data.The model had guiding significance to growth regulation of rice root under the condition of atmospheric [CO2 ] rising in the future. Hybrid indica rice (Oryza sativa L.) cultivars play an important role in rice production system due to its heterosis, resistance to environmental stress, large panicle, and high yield potential. However, no attention has been given to its root growth dynamic responses to rising atmospheric CO2 concentration ([CO2]) in conjunction with nitrogen (N) availability. Free air COz enrichment (FACE) and N have significant effects on rice root growth. In this experiment, a hybrid cultivar Shanyou 63 (Oryza sativa L.) was used to study the effects of FACE and N levels on roots growth of rice. The results showed a significant increase in both adventitious root volume (ARV) and adventitious root dry weight (ARD) under the FACE treatment. The application of nitrogen also increased ARV and ARD, but the increase was smaller than that under FACE treatment. On the basis of the FACE experiment, numerical models for rice adventitious root volume and dry weight were built with the time as the driving factor. The models illustrated the dynamic development of rice adventitious root volume and dry weight after transplanting, regulated either by the influence factor of atmospheric [CO2] or by N application. The models were successfully used to predict ARV and ARD under FACE treatment in a different year with the predicted data being closely related to the actual experimental data. The model had guiding significance to growth regulation of rice root under the condition of atmospheric [CO2] rising in the future.
作者 SUN Cheng-ming LIU Tao GUO Dou-dou ZHUANG Heng-yang WANG Yu-long ZHU Jian-guo SUN Cheng-ming1,LIU Tao1,GUO Dou-dou1,ZHUANG Heng-yang1,WANG Yu-long1 and ZHU Jian-guo2 1 Key Lab of Crop Cultivation & Physiology,Jiangsu Province/Agricultural College,Yangzhou University,Yangzhou 225009,P.R.China 2 Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210093,P.R.China
出处 《农业科学学报:英文版》 SCIE CSCD 2013年第5期781-787,共7页 Agricultural Sciences in China
基金 This work was funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, China and the Key Direction Research of Knowledge Innovation in Chinese Academy of Science (KZCX3-SW- 440). The main instruments and apparatus of the FACE system were supplied by Japan National Institute for Agro- Environmental Sciences (NIAES) and Japan Agricultural Research Center for Tohoku Region (NARCT).
关键词 籼型杂交水稻 水稻品种 根系生长 汕优63 航空领域 数值模拟 生长动态 二氧化碳 hybrid indica rice, free air C02 enrichment (FACE), root volume, root dry weight, numerical model
作者简介 Correspondence WANG Yu-long, Tel: +86-514-87979211, E-mail: ylwag@yzu.edu.cn
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