ROSE QUALITY AS AFFECTED BY HIGHER AIR TEMPERATURES RESULTING FROM POLY-TUNNEL HEIGHT IN A SUBTROPICAL REGION
文献类型： 外文期刊
第一作者： Zou, L.
作者： Zou, L.;Li, S.;Wang, L.;Zhang, Y.;Wang, J.;Falinski, K.;Falinski, K.;Yost, R.;Wu, X.
作者机构：
关键词： Cut flower; Membrane thermal stability; Stem length; Stem mass; Yunnan Province
期刊名称：APPLIED ENGINEERING IN AGRICULTURE （ 影响因子：0.985； 五年影响因子：1.02 ）
ISSN： 0883-8542
年卷期： 2020 年 36 卷 4 期
页码：
收录情况： SCI
摘要： High temperature is a major constraint to plant production in many regions of the world. Observations indicate that poly-tunnel structure design can influence interior temperature, and in turn determine the quality of cut flowers, including the length of the stems, the leaf biomass, and nutrient uptake. In this study, interior temperature and cut-flower quality of roses were assessed in five poly-tunnels with eave heights ranging from 2 to 4 m. Interior temperatures from 11:00-15:00 h in the hottest months of July and August were monitored. Rose (Rosa hybrids 'Peach Avalanche') was cultivated in these poly-tunnels with the same cultivation regimes. Higher interior temperatures were observed in poly-tunnels with lower eave heights. Leaf membrane thermal stability (MTS) values were negatively correlated with higher interior temperatures, indicating that the photosynthetic system of plant leaves was impaired. Stem length and mass were decreased with higher temperature by over 50%, while leaf biomass decreased by 25% in the poly-tunnel with eave height of 2 m in comparison with that of 4 m. Nitrogen concentration in plant leaves increased with higher temperature, whereas the patterns of other elements were not associated with different poly-tunnel eave heights. These results indicate that poly-tunnel interior high temperatures that were associated with lower eave heights are a major constraint for commercialized rose-cut flower production in this region, and improved design of poly-tunnels could increase production.
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