| 冬小麦冠层阻力日变化的估算 |
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| 引用本文： | 胡继超,张佳宝,赵炳梓,朱安宁.冬小麦冠层阻力日变化的估算[J].灌溉排水学报,2005,24(2):1-4. |
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| 作者姓名： | 胡继超 张佳宝 赵炳梓 朱安宁 |
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| 作者单位： | 中国科学院,封丘农业生态国家实验站,河南,封丘,453300;土壤与农业可持续发展国家重点实验室,中国科学院 南京土壤研究所,江苏,南京,210008 |
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| 基金项目： | 国家高技术研究发展计划"863"项目(2003AA209010),中国科学院野外台站基金资助项目 |
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| 摘 要： | 根据田间试验观测资料,利用3种作物冠层阻力估算方法推算了冬小麦在拔节、抽穗、灌浆3个生育时期在典型晴天、土壤水分充分供应状况下冠层阻力的日变化。3种作物冠层阻力估算方法为利用波文比能量平衡法使用Penman-Monteith公式反推(rc-BREB)、利用冠层温度和蒸散量推算(rc-Tc)、利用不同部位单叶气孔阻力和有效叶面积指数合成法推算(rc-LAI)。结果表明,3种作物冠层阻力估算方法均推得的冠层阻力日变化趋势相同,但冠层阻力值大小存在差异。冬小麦冠层阻力在08:00～15:00时变化平稳,15:00以后开始升高,日落前后升高最为剧烈。采用冠层温度推算的冠层阻力rc-Tc比rc-BREB偏低,rc-LAI在灌浆后期和15:00后比rc-BREB偏高,且没有rc-BREB变化平稳。
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| 关 键 词： | 冠层阻力 蒸散 冠层温度 冬小麦 |
| 文章编号： | 1000-646X(2005)02-0001-04 |
| 修稿时间： | 2005年1月12日 |
Estimating Diurnal Variation of Winter Wheat Canopy Resistance at Different Growth Stages |
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| HU Ji-chao,ZHANG Jia-bao,ZHAO Bing-zi,ZHU An-Ning.Estimating Diurnal Variation of Winter Wheat Canopy Resistance at Different Growth Stages[J].Journal of Irrigation and Drainage,2005,24(2):1-4. |
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| Authors: | HU Ji-chao ZHANG Jia-bao ZHAO Bing-zi ZHU An-Ning |
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| Abstract: | Based on the field measurements under clear sky and well-watered condition at jointing, heading and grain-filling stages of winter wheat in 2004, diurnal canopy resistances were estimated with three different methods (obtaining by inversion of the Penman-Monteith equation with Bowen ratio(r_(c-BREB)), calculating with canopy temperature and LE(r_(c-Tc)), scaling up from single leaf stoma resistance (r_(c-LAI)). The results showed that diurnal canopy resistances stay relatively constant during 08:00~15:00, then increase gradually after 15:00 and sharply around sunset. r_(c-Tc) is lower than r_(c-BREB) at three stages, but r_(c-LAI) is higher than r_(c-BREB) at grain filling stage and after 15:00 at jointing and heading stages. |
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| Keywords: | canopy resistance canopy temperature evapotranspiration winter wheat |
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