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首页> 外文会议>International Horticultural Congress on Science and Horticulture for People >Gas-Exchange Measurements on Mature, Field-Grown Grapevines by Whole-Canopy Enclosure
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Gas-Exchange Measurements on Mature, Field-Grown Grapevines by Whole-Canopy Enclosure

机译：通过全冠层外壳进行成熟，现场种植葡萄树的气体交换测量

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An open-system, whole-canopy enclosure chamber for gas-exchange determinations was tested on three mature grapevines (Vitis vinifera L. 'Aglianico') during the summer of 2005. Data were measured by using an IRGA (Li-COR-840) and were collected automatically every 3 min using a CR23X datalogger mounted inside of the chamber. Temperature, leaf water potential and volumetric soil water contents were monitored at intervals. At harvest, canopy leaf area was about 9 m2. On 30 July, recent rainfall had restored soil water status to about 33% of soil volume (near field capacity). Under these conditions assimilation (A) and transpirations (7) showed mean daily values of 20 μmol s~(-1) and 7.5 mmol s~(-1) respectively and noon leaf water potentials were -1.1 MPa. By 13 August soil water content had fallen to 24% (close to wilting point), noon leaf water potential was -1.4 MPa and A and T showed values of 13 μmol s~(-1) and 2.5 mmol s~(-1) respectively indicating stressed conditions but with increased whole canopy water use efficiency. Gas-exchange data are comparable to values found in the literature for grapevine under stress condition and show that the new canopy chamber is an effective system for measuring the gas-exchange of mature vines in the field.
机译：在2005年夏季，在三个成熟的葡萄（葡萄vinifera L.'Aglianico'）上测试了一种开放式系统，全冠覆盖箱进行了用于气体交换测定的。通过使用IRGA（Li-Cor-840）来测量数据并使用安装在腔室内的CR23x Datalogger每3分钟自动收集。以间隔监测温度，叶水势和体积土壤含水量。在收获时，冠层叶面积约为9平方米。 7月30日，近期降雨已经将土壤水分状况恢复到土壤体积的约33％（近场容量）。在这些条件下，同化（A）和转档（7）显示平均每日值为20μmolS〜（-1）和7.5mmol S〜（-1），中午叶水电位为-1.1MPa。八月土壤水含量下降至24％（靠近衰弱点），中午叶水电位为-1.4MPa，A和T显示为13μmols〜（-1）和2.5mmol s〜（-1）分别表明压力条件，但随着整个顶篷用水利用效率提高。气体交换数据与在压力条件下的葡萄树中的文献中发现的值相当，并表明新的遮篷室是用于测量现场成熟藤的气体交换的有效系统。

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