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Impact of steep slope management system and row orientation on canopy microclimate. Comparing terraces to downslope vineyards
Agricultural and Forest Meteorology ( IF 6.2 ) Pub Date : 2021-06-22 , DOI: 10.1016/j.agrformet.2021.108515
Timo Strack , Dominik Schmidt , Manfred Stoll

Historically and under cooler climate conditions, steep slope vineyards yielded best quality wines and highest reputation, due to their distinctive microclimate, especially during ripening period. Nevertheless, steep slope vineyard sites primarily suffer from reduced competitiveness leading to abandonment, thus a loss of valuable vineyard sites. The aim of this work was to investigate differences in microclimatic conditions between different steep slope vineyard management systems and row orientations. Records of inner canopy microclimatic parameters were taken over two consecutive vegetation periods including seven vineyard pairs. A Bayesian mixed effect model was used to properly account for the complexity of the conducted experiment. Additionally, irradiation and canopy surface temperature data was compared. Grapevines planted downslope (control) exhibited a more even light distribution on canopy sides. Contrarily, at terraced vineyard sites canopy sides showed big differences regarding light interception, also affecting diurnal canopy surface temperature. Differences in N-S/E-W row orientation comparison were more pronounced compared to vineyard pairs aligned NE-SW/NW-SE. Night temperatures were slightly higher in terraced vineyards, while daily mean and maximum temperature and temperature amplitude were higher in vineyard rows planted in line of the greatest slope. While a treatment effect was not always clearly visible, an impact of row orientation on temperature microclimate was observed. Differences between treatments may become more pronounced under projected climate change conditions with consequences on physiological processes, thus grapevine performance influencing berry composition.



中文翻译:

陡坡管理系统和行向对冠层微气候的影响。梯田与下坡葡萄园的比较

从历史上看,在较凉爽的气候条件下,陡坡葡萄园因其独特的小气候,尤其是在成熟期,出产最优质的葡萄酒和最高的声誉。然而,陡坡葡萄园的主要问题是竞争力下降导致废弃,从而失去宝贵的葡萄园。这项工作的目的是调查不同陡坡葡萄园管理系统和行方向之间小气候条件的差异。内冠层小气候参数的记录是在两个连续的植被时期进行的,包括七个葡萄园对。贝叶斯混合效应模型用于正确说明所进行实验的复杂性。此外,还比较了辐照和冠层表面温度数据。下坡种植的葡萄藤(对照)在树冠侧表现出更均匀的光分布。相反,在梯田葡萄园,冠层两侧在光拦截方面表现出很大差异,也影响了昼夜冠层表面温度。与 NE-SW/NW-SE 对齐的葡萄园对相比,NS/EW 行方向比较的差异更为明显。梯田葡萄园的夜间温度略高,而在最大坡度线上种植的葡萄园行的日平均和最高温度和温度幅度较高。虽然处理效果并不总是清晰可见,但观察到行方向对温度小气候的影响。在预计的气候变化条件下,处理之间的差异可能变得更加明显,从而对生理过程产生影响,

更新日期:2021-06-22
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