A. Ohsumi, H. Heinai, Masaki Okamura, M. Yoshimoto, T. Hosono
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引用次数: 0
Abstract
ABSTRACT Rice growth at an elevated air temperature (T air) during the ripening period is often evaluated using a semi-closed chamber (SCC). However, the water vapor pressure deficit (VPD) and CO2 concentration inside SCCs get lower than at ambient air plot, and these changes affect panicle temperature and photosynthesis. We developed a punched-top chamber (PTC), that is, an SCC with numerous pores on the top, and compared meteorological environments inside the two chambers and of ambient air plot. When solar radiation was >200 W m-2, ΔT air (SCC – Ambient) was 3.1°C–5.3°C, and ΔT air (PTC – Ambient) was 2.2°C–3.7°C. Excessively high T air > 38°C were more frequent inside the SCC than the PTC. The changes in VPD and CO2 concentration inside the PTC were less pronounced compared with those of the SCC, and thus PTC can be a better treatment for safely assessing the direct effect of elevated T air. Graphical abstract
摘要水稻成熟期在高温（T空气）下的生长通常使用半密闭室（SCC）进行评估。然而，短链氯化石蜡内的水蒸气压差（VPD）和CO2浓度低于环境空气区，这些变化影响了穗部温度和光合作用。我们开发了一个冲压顶室（PTC），即顶部有许多孔隙的SCC，并比较了两个室内的气象环境和环境空气图。当太阳辐射>200 W m-2时，ΔT空气（SCC–环境温度）为3.1°C–5.3°C，ΔT气体（PTC–环境温度（PTC））为2.2°C–3.7°C。SCC内部温度>38°C的过高情况比PTC更常见。与SCC相比，PTC内的VPD和CO2浓度的变化不那么明显，因此PTC可以更好地安全评估T空气升高的直接影响。图形摘要
期刊介绍：
Plant Production Science publishes original research reports on field crops and resource plants, their production and related subjects, covering a wide range of sciences; physiology, biotechnology, morphology, ecology, cropping system, production technology and post harvest management. Studies on plant production with special attention to resource management and the environment are also welcome. Field surveys on cropping or farming system are also accepted. Articles with a background in other research areas such as soil science, meteorology, biometry, product process and plant protection will be accepted as long as they are significantly related to plant production.
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