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	Effects of climatic variation and warming on rice development across South China
	Yu Q.
	2008
关键词	climatic variation temperature photoperiod rice development model South China simulation-model growing-season river valley variability impact yields philippines validation growth crops
英文摘要	Rice Oryza sativa L. development-and also its response to climatic change - is mainly determined by temperature and photoperiod. An experiment was conducted to study the influence of meteorological factors on growth and development of hybrid rice in South China, in which seeds were sown at different sites at different dates in the spring. The 29 experimental sites were spread over a large area, with latitudes from 21 degrees 39' to 34 degrees 16'N and altitudes from 1 to 1862 m above sea level. It was found that the length of the growth period at low latitudes (21 to 25 degrees N) was mainly determined by temperature and showed a single-peaked curve with an optimum temperature at about 25.7 degrees C. The temperature response of development is almost linear at high latitudes (25 to 35 degrees N), but the dependence is not as close and significant as that at low latitude, due to longer daylength and its higher variation. A phenological-simulation model with a biological basis was used to simulate the developmental stages of rice in South China. It described both thermal sensitivity and photoperiodism using nonlinear equations. The model was validated by data of sowing-date experiments carried out at different geographical sites, and then was applied to evaluate changes in the length of the rice-growth period in response to climate warming during the period from 1951 to 2006. Because there was significant warming, and the length of the growth period was sensitive to this change over the Yunnan-Guizhou Plateau, the length of the growth period was narrowed by 6 to 14 d (comparing 1990 to 2006 with 1951 to 1989), whereas it was shortened by I to 2 d in most low plain areas in South China. The probability of serious temperature related crop failure will increase if planting of a late-maturity variety is adopted in high altitude areas.
出处	Climate Research
卷	36
期	1
页	79-88
收录类别	SCI
语种	英语
ISSN号	0936-577X
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/23352]
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 Q.. Effects of climatic variation and warming on rice development across South China. 2008.

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