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	Ecophysiological response of rice to sandmoving air currents
	Yu Y. J. ; Shi P. J. ; Lu C. X. ; Zheng Y. R. ; Shimizu H.
	2005
关键词	blowing time ecophysiological responses rice sandmoving air current wind velocity sandblast damage wind plants photosynthesis seedlings recovery injury
英文摘要	Rice (Oryza saliva L.) growth should be affected by sandmoving air current (sand blast), whereas no data of associated damage on rice have been available. Laboratory wind tunnel experiments were conducted to analyze the physiological responses of rice to injury caused by sandblast and its effects on growth and yield. Plants were exposed to sandmoving air currents of varying wind speeds (6, 12, 18 and, 24 to s(-1), respectively) for 30 min in each exposure event, ranging from 1 to 3 events during the experimental period of 6 days. The results showed that increasing wind speed and frequency of exposure events led to reductions of net photosynthetic rate, leaf water content and water use efficiency as compared with control. The photosynthetic rate decreased at wind speeds of 12, 18 and 24 m s(-1) by 61, 76 and 79%, respectively after one exposure event. Both wind speed and the frequency of exposure events were the important factors reducing seedling survival and impairing rice development (grain weight, head, maturity, root/shoot ratio, etc.). With increasing number of exposure events from I to 3, the average survival rate decreased from 100 to 83% at 12 m s(-1), from 83 to 42% at 18 m s(-1), from 58 to 17% at 24 m s(-1), respectively.
出处	Phyton-Annales Rei Botanicae
卷	45
期	4
页	595-600
收录类别	SCI
语种	英语
ISSN号	0079-2047
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/22494]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Yu Y. J.,Shi P. J.,Lu C. X.,et al. Ecophysiological response of rice to sandmoving air currents. 2005.

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