张大龙,张中典,李建明.环境因子对温室甜瓜蒸腾的驱动和调控效应研究[J].农业机械学报,2015,46(11):137-144.
Zhang Dalong,Zhang Zhongdian,Li Jianming.Co-ordination of Environmental Factors in Driving and Regulating Transpiration Rate of Greenhouse Grown Muskmelon[J].Transactions of the Chinese Society for Agricultural Machinery,2015,46(11):137-144.
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环境因子对温室甜瓜蒸腾的驱动和调控效应研究   [下载全文]
Co-ordination of Environmental Factors in Driving and Regulating Transpiration Rate of Greenhouse Grown Muskmelon   [Download Pdf][in English]
投稿时间:2015-06-17  
DOI:10.6041/j.issn.1000-1298.2015.11.019
中文关键词:  温室 甜瓜 蒸腾 环境因子 正交试验
基金项目:国家自然科学基金资助项目(31471916)和“十二五”国家科技支撑计划资助项目(2014BAD14B06)
作者单位
张大龙 西北农林科技大学 
张中典 西北农林科技大学 
李建明 西北农林科技大学 
中文摘要:为探明温室环境对甜瓜蒸腾的驱动和调控机理,以土壤相对含水率、空气温度、相对湿度和光辐射量为试验因素,按四因素五水平二次回归正交旋转组合设计,测定了不同环境因子组合下甜瓜叶片蒸腾速率和气孔导度。利用水量平衡法控制土壤含水率,用Li-6400型光合仪叶室控制温度、相对湿度和光辐射量,定量分析了瞬时尺度上土壤和气象环境因子对甜瓜叶片蒸腾速率影响的的主效应、单因子效应、边际效应和交互作用,建立了环境因子驱动的蒸腾速率模型。研究结果表明:除相对湿度外,土壤相对含水率、空气温度和光辐射量对蒸腾速率均为正效应,其中土壤相对含水率和空气温度的单因子效应趋近线性函数,光辐射量和相对湿度的单因子效应分别为开口向上和向下抛物线函数;土壤相对含水率和空气温度的边际效应随编码值的递增变化较平缓,且在试验编码范围内均为正效应,光辐射量和相对湿度对蒸腾的边际效应随编码值的增加分别呈显著递增和递减趋势,其正负效应临界编码值分别为-0.69和-1.49;环境因子对蒸腾的影响存在交互作用,表现为协同促进或拮抗调控作用,大气水汽压亏缺是环境影响蒸腾的重要中转因子,在瞬时尺度叶片蒸腾的调控中起主导作用。
Zhang Dalong  Zhang Zhongdian  Li Jianming
Northwest A&F University,Northwest A&F University and Northwest A&F University
Key Words:Greenhouse Muskmelon Transpiration Environmental factors Orthogonal experiment
Abstract:Based on the experimental factors like soil moisture, air temperature, relative humidity and solar radiation, a composite quadratic orthogonal regressive rotation design of four factors and five levels was adopted to characterize the co-ordination of environmental factors in driving and regulating transpiration rate of greenhouse grown muskmelon. Soil moisture was maintained by using weighing method, and environmental factors were controlled by the chamber of a portable photosynthesis system (Li-6400; LI-COR). Transpiration rate and stomatal conductance were measured under different combinations of environmental factors. Characterizations of main effect, single effect and marginal effect for each environmental factor were determined by using the environmental data. The results showed that: all of the environmental factors were positively correlated with transpiration rate except relative humidity. Correlation between transpiration rate and soil moisture, temperature can be described in a linear function, respectively. But solar radiation and relative humidity exhibited parabolic functions with transpiration rate. Soil moisture and temperature showed a stable positive marginal effect on transpiration rate with increasing treatment levels, while solar radiation and relative humidity showed linear functions with a positive and negative slope, respectively. Marginal effects of solar radiation and relative humidity were divided into positive and negative with threshold treatment levels of -0.69 and -1.49. Considering the tight coordination between environmental factors in regulating transpiration rate, a quantitative framework was presented to characterize and quantify pathways of each environmental factor. Vapour pressure deficit (VPD) was an important intermediary factor in modulating driving force of other environment factors, which performed a dominant role in determining leaf transpiration rate at the instantaneous scale.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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