Interactions of elevated [CO2] and night temperature on rice growth and yield
Interactions of elevated [CO2] and night temperature on rice growth and yield
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DOI：
10.1016/j.agrformet.2008.07.006
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发表时间：
2009-01-04
影响因子：
6.2
通讯作者：
Hasegawa, Toshihiro
中科院分区：
文献类型：
--
作者：
Cheng, Weiguo;Sakai, Hidemitsu;Hasegawa, Toshihiro
为了了解夜间高温和生殖生长期升高的[CO2]如何影响水稻生长和产量，我们在四个受控环境下进行了盆栽试验，设置了两个水平的[CO2](环境，380ppm；升高，680ppm)和两个水平的夜间温度(22摄氏度和32摄氏度)。所有处理的白天温度都是32摄氏度。结果表明，高二氧化碳浓度和高夜间温度均显著增加植株和茎干重(P<；0.01)，而果穗干重显著增加(P<；0.01)，夜间高温显著降低。夜间高温显著降低受精小穗数(P<；0.01)，但不影响受精小穗数(P=0.18)。[CO2]浓度升高显著增加个体粒重(P=0.03)。结果表明，[CO2]升高显著提高了糙米产量(P<；0.01)，夜间高温显著降低了糙米产量(P<；0.01)，且[CO2]与夜间温度交互作用显著(P<；0.05)。结果表明，如果两者继续增加，未来夜间高温将降低CO2浓度升高对水稻产量的促进作用。(C)2008爱思唯尔B.V.保留所有权利
To understand how a combination of high night temperature and elevated [CO2] during the reproductive growth period affects rice growth and yield, we conducted a pot experiment in four controlled-environment chambers with two levels of [CO2] (ambient, 380 ppm; and elevated, 680 ppm) and two levels of night temperature (22 and 32 degrees C). The day temperature was 32 degrees C in all treatments. As results, the whole plant and stem dry weight were significantly increased by both elevated [CO2] and high night temperature (P < 0.01), while the ear dry weight was significantly increased by elevated [CO2] and decreased by high night temperature (both P < 0.01). The fertilized spikelet number was significantly decreased by high night temperature (P < 0.01), but not affected by elevated [CO2] (P = 0.18). The individual grain weight was significantly increased by elevated [CO2] (P = 0.03). Consequently, brown rice yield was significantly increased by elevated [CO2] (P < 0.01) but decreased by high night temperature (P < 0.01), with a significant interaction of [CO2] and night temperature (P < 0.05). The results indicate that high night temperature will reduce the stimulatory effect of elevated (CO2] on rice production in the future if both continue to increase. (c) 2008 Elsevier B.V. All rights reserved