Effects of Diffuse Light on Microclimate of Solar Greenhouse, and Photosynthesis and Yield of Greenhouse-grown Tomatoes

Zheng, Liang; Zhang, Qi; Zheng, Kai; Song, Zhao; Wang, Pingzhi; Cheng, Jinlong; Chen, Xiaowen

doi:10.21273/hortsci15241-20

Cited by 13 publications

(7 citation statements)

References 23 publications

(31 reference statements)

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“…Increased temperature and drought may also drive more agriculture into greenhouse settings, where different glazings can be employed to control the quantity and quality of radiation. Open-air, diffuse light greenhouses have the potential to reduce the energy demand for crop growth (Hemming et al 2008; Zheng et al 2020). We observed that diffuse light has the ability to lower leaf and greenhouse temperatures while maintaining similar light quantity, which would decrease the amount of energy spent on cooling (Elings et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

Seeing light from a different angle: the effects of diffuse light on the function, structure, and growth of tomato plants

Ellertson¹,

Goldsmith²,

Berry

2022

Preprint

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While considerable attention has been paid to how plants respond to changes in the spectral distribution and quantity of light, less attention has been paid to how plants respond to changes in the angular qualities of light. Evidence from both leaf- and ecosystem-scale measurements indicate that plants vary in their response to diffuse compared to direct light growing environments. Because of the significant implications for agricultural production, we quantified how changes in light quality affect the structure, function, and growth of Roma tomatoes in an open-air greenhouse experiment with direct and diffuse light treatments. Diffuse light conditions (ca. 50-60% diffuse) were created with a glass coating to diffuse light without significantly reducing the quantity of light. We measured leaf physiology and structure, as well as whole plant physiology, morphology, and growth. Light-saturated photosynthetic rates were set by the growing light environment and were unchanged by short-term exposure to the opposite light environment. Thus, after two months, plants in the diffuse light treatment demonstrated lower photosynthesis and had thinner leaves with higher chlorophyll concentration. However, relative growth rates did not differ between treatments and plants grown in diffuse light had significantly higher biomass at the conclusion of the experiment. While there was no difference in leaf or whole-plant water-use efficiency, plants in the diffuse light treatment demonstrated significantly lower leaf temperatures, highlighting the potential for diffuse light coatings and/or materials to reduce greenhouse energy use. Our results highlight the need to advance our understanding of the effects of diffuse light conditions on agricultural crops growing on a changing planet.

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Section: Discussionmentioning

confidence: 99%

Seeing light from a different angle: the effects of diffuse light on the function, structure, and growth of tomato plants

Ellertson¹,

Goldsmith²,

Berry

2022

Preprint

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“…There are several other benefits of growing crops under covers. For instance, blueberry production is increased under covers due to early bud development [ 65 ], higher temperatures under tunnels enhance fruit setting [ 66 ], and diffusion of light favours leaf stomatal conductance and enhances photosynthesis [ 65 , 66 , 67 ]. In addition, higher productivity for the retail market is achieved by extending the growing seasons under crop covers [ 68 ].…”

Section: Blueberry Production Systemsmentioning

confidence: 99%

Improving Blueberry Fruit Nutritional Quality through Physiological and Genetic Interventions: A Review of Current Research and Future Directions

et al. 2023

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Blueberry, hailed as an antioxidant superfood, is the fruit of small shrubs in the genus Vaccinium (family Ericaceae). The fruits are a rich source of vitamins, minerals and antioxidants such as flavonoids and phenolic acids. The antioxidative and anti-inflammatory activities derived from the polyphenolic compounds, particularly from the abundantly present anthocyanin pigment, have been highlighted as the major contributing factor to the health-benefitting properties of blueberry. In recent years, blueberry cultivation under polytunnels has expanded, with plastic covers designed to offer protection of crop and fruit yield from suboptimal environmental conditions and birds. An important consideration is that the covers reduce photosynthetically active radiation (PAR) and filter out ultraviolet (UV) radiation that is critical for the fruit’s bioactive composition. Blueberry fruits grown under covers have been reported to have reduced antioxidant capacity as compared to fruits from open fields. In addition to light, abiotic stresses such as salinity, water deficit, and low temperature trigger accumulation of antioxidants. We highlight in this review how interventions such as light-emitting diodes (LEDs), photo-selective films, and exposure of plants to mild stresses, alongside developing new varieties with desired traits, could be used to optimise the nutritional quality, particularly the content of polyphenols, of blueberry grown under covers.

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“…The radiance of the lighting roof and the transparency of the plastic film are the dominant factors that determine the performance of greenhouse light absorption and resulting energy performance. Previous studies on the optical properties of the lighting roof have achieved remarkable outcomes and recommended that the diffuse light plastic films can improve the homogeneity of the canopy light distribution and increase crop production [14,36]. However, only a few studies have investigated the effect of greenhouse orientation on light interception [16].…”

Section: Interception Of Solar Energy On Lighting Roof Of Csg With Di...mentioning

confidence: 99%

Determination of the Optimal Orientation of Chinese Solar Greenhouses Using 3D Light Environment Simulations

Liu

Henke

et al. 2022

Remote Sensing

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With the continuous use of resources, solar energy is expected to be the most used sustainable energy. To improve the solar energy efficiency in Chinese Solar Greenhouses (CSG), the effect of CSG orientation on intercepted solar radiation was systematically studied. By using a 3D CSG model and a detailed crop canopy model, the light environment within CSG was optimized. Taking the most widely used Liao-Shen type Chinese solar greenhouse (CSG-LS) as the prototype, the simulation was fully verified. The intercepted solar radiation of the maintenance structures and crops was used as the evaluation index. The results showed that the highest amount of solar radiation intercepted by the maintenance structures occurred in the CSG orientations of 4–6° south to west (S-W) in 36.8° N and 38° N areas, 8–10° S-W in 41.8° N areas, and 2–4° south to east (S-E) in 43.6° N areas. The solar radiation intercepted by the crop canopy displayed the highest value at an orientation of 2–4° S-W in 36.8° N, 38° N, 43.6° N areas, and 4–6° S-W in the 41.8° N area. Furthermore, the proposed model could provide scientific guidance for greenhouse crop modelling.

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Effects of Diffuse Light on Microclimate of Solar Greenhouse, and Photosynthesis and Yield of Greenhouse-grown Tomatoes

Cited by 13 publications

References 23 publications

Seeing light from a different angle: the effects of diffuse light on the function, structure, and growth of tomato plants

Seeing light from a different angle: the effects of diffuse light on the function, structure, and growth of tomato plants

Improving Blueberry Fruit Nutritional Quality through Physiological and Genetic Interventions: A Review of Current Research and Future Directions

Determination of the Optimal Orientation of Chinese Solar Greenhouses Using 3D Light Environment Simulations

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