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- Title
Impacts of nighttime warming on rice growth stage and grain yield of leading varieties released in different periods in Jiangsu Province, China.
- Authors
ZHANG Xin; CHEN Jin; JIANG Yu; DENG Ai-xing; SONG Zhen-wei; ZHENG Cheng-yan; ZHANG Wei-jian
- Abstract
A field experiment was conducted to investigate the actual impacts of nighttime warming on rice growth stage and grain yield in Danyang, Jiangsu Province, with 8 leading varieties approved and released during 1970s-2000s. The field was warmed at nighttime for an entire growth stage (i. e. sown date to harvest) with a Free Air Temperature Increase (FATI) facility. The results showed that there were significant differences in the extents of warming impact on rice growth stage and grain yield among the leading varieties, though the impact trends were similar. An increase of 0. 9 °C in nighttime mean temperature in rice canopy could shorten the length of rice entire growth stage by 1. 3 d. Nighttime warming tended to decrease post?anthesis green leaves area and the flag leaf area, and to decline rice aboveground biomass production and grain yield by 3. 5% and 5. 1%, respectively. Meanwhile, nighttime warming decreased the plant nitrogen concentration at maturity. Nighttime warming reduced the grain yield mainly through decreasing the effective panicles and grain numbers per panicle. There was no stable changing trend in the differences in warming impacts on the varieties released in the different periods.
- Subjects
CHINA; GRAIN growth; EFFECT of temperature on plants; GRAIN yields; GRAIN varieties; RICE
- Publication
Yingyong Shengtai Xuebao, 2014, Vol 25, Issue 5, p1349
- ISSN
1001-9332
- Publication type
Article