干旱区生态环境知识资源中心(Arid): 南方现代化温室黄瓜冬季蒸腾测量与模拟研究

Arid

	南方现代化温室黄瓜冬季蒸腾测量与模拟研究
其他题名	MEASUREMENT AND SIMULATION OF CUCUMBER CANOPY TRANSPIRATION IN A SUBTROPICAL MODERN GREENHOUSE UNDER WINTER CLIMATE CONDITIONS
	罗卫红; 汪小？; 戴剑峰; 丁为民; 郭世荣; 李式军
来源期刊	植物生态学报
ISSN	1005-264X
出版年	2004
卷号	28 期号:1 页码:59-65
中文摘要	温室作物蒸腾直接影响到温室内空气温湿度,是进行温室温度和湿度优化调控所必需的信息.通过冬季温室小气候和蒸腾速率与气孔阻力的实验观测,分析了冬季南方温室黄瓜(Cucumis sativus)蒸腾速率的变化特征及其与温室小气候要素之间的定量关系,确定了南方现代温室冬季黄瓜冠层阻力rc和边界层动力学阻力ra的特征值和作物蒸腾消耗的潜热占到达冠层上方的净辐射的比例,并采用Penman-Monteith方法模拟计算了冬季温室内黄瓜作物蒸腾速率.结果表明,冬季温室内作物蒸腾速率的日变化趋势与净辐射的日变化基本一致,在正午达一天中的最大值.而空气饱和水汽压差(VPD)的日最大值则基本出现在午后1～2 h.在我国南方温室冬季高湿的环境下(VPD<2 kPa),作物蒸腾速率日变化主要取决于太阳辐射日变化.冠层上方的净辐射和VPD及作物冠层蒸腾速率日最大值分别在350 W·m~(-2)、2.0 kPa和200 W·m~(-2)以下.冬季温室作物蒸腾消耗的潜热占到达冠层上方的净辐射的比例为46%.冬季黄瓜作物的rc和ra特征值分别为100 s·m~(-1)和600 s·m~(-1).采用实际变化的rc与ra值和rc与ra的特征值计算的作物蒸腾速率和累积蒸腾量均与实测值基本一致.作物蒸腾消耗的潜热占到达冠层上方的净辐射的比例及rc和ra特征值的确定为研制基于作物蒸腾模型的温室环境和肥水灌溉的优化控制系统奠定了基础.但研究所确定的这些特征值在其它地区和其它类型温室是否适用,尚需进一步的实验资料来证明.
英文摘要	Canopy transpiration of crops grown in greenhouses affects greenhouse air temperature and humidity arid is therefore important for the optimization of greenhouse climate control. In this study, cucumbers (Cu-cizmis sativus) were grown in a subtropical modern greenhouse under winter climate conditions, canopy transpi-ration was measured every 30 minutes and greenhouse microclimatic factors were sampled with 1 second interval and 30 minutes average values were saved in a datalogger and mean values of canopy resistance r_c and bound-ary layer resistance r_a were estimated based on experimental measurements made in the greenhouse. The Pen-man-Monteith equation was used to estimate canopy transpiration rates. The results showed that the diurnal time course of canopy transpiration rates followed that of the net radiation above the canopy with the daily maxi-mum value occurring at 12:00. In contrast, maximum water vapor pressure deficit (VPD) occurred between 13 : 00 and 14:00. These results indicate that under winter climate conditions of China, subtropical greenhouse microclimate conditions are characterized by low VPD level and that daytime variations of crop canopy transpi-ration rates depend primarily on net radiation above the canopy. The daily maximum values of net radiation and VPD above the canopy and crop canopy transpiration rates were below 350 W·m~(-2), 2.0 kPa and 200 W·m~(-2), respectively; the ratio of latent heat caused by crop transpiration to the net radiation above the canopy in winter averaged 46%; and r_c and r_a were 100 s·m~(-1) and 600 s·m~(-1), respectively. The crop canopy transpiration rate and total cumulative crop transpiration calculated by Penman-Monteith equations using both the actual r_c and r_a values and the mean values of r_c and r_a agreed well with the measured results. The determina-tion of the ratio of latent heat to the net radiation above the canopy (46%) and the characteristic values of r_c C = 100 s·m~(-1)) and r_a(600 S·m~(-1)) facilitates the development of a crop transpiration model to optimize greenhouse climate and irrigation control systems. More experiments are needed to determine if these values are valid for other sites and types of greenhouses.
中文关键词	温室 ; 黄瓜 ; 蒸腾速率 ; 南方 ; 冬季
英文关键词	greenhouse cucumber transpiration rate subtropical area winter
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:1568898
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/205650
作者单位	南京农业大学农业部, 作物生长调控重点开放实验室, 南京, 江苏 210095, 中国
推荐引用方式 GB/T 7714	罗卫红,汪小？,戴剑峰,等. 南方现代化温室黄瓜冬季蒸腾测量与模拟研究[J],2004,28(1):59-65.
APA	罗卫红,汪小？,戴剑峰,丁为民,郭世荣,&李式军.(2004).南方现代化温室黄瓜冬季蒸腾测量与模拟研究.植物生态学报,28(1),59-65.
MLA	罗卫红,et al."南方现代化温室黄瓜冬季蒸腾测量与模拟研究".植物生态学报 28.1(2004):59-65.