![]() High-efficiency utilization of solar radiation is the most essential ingredient in the extensive use of CSG. ![]() According to the Agricultural Mechanization Management Department of China (2018), by the end of 2018, CSG cover 577 thousand hectares. ![]() CSG represent an important guarantee for China’s annual vegetable supply balance ( Tong et al., 2013) and significantly contribute to increase farmers’ income ( Panwar et al., 2011 Guo et al., 2012). The strategy provided here can be used to configure reflective films that will enhance light conditions in CSG, which can be applied and extended in different scenarios.Ĭhinese solar greenhouses (CSG) are constructed to provide adequate growth condition for vegetable production even during hard winter times without any auxiliary heating or additional light sources. The reflective film configuration scheme with the highest impact significantly improved the evenness of horizontal and vertical light distribution in tomato canopy. A series of reflective film configurations were investigated based on features analysis of light distribution in the tomato canopy on sunny days using the proposed model. Comparison of measured solar radiation intensity with predicted model data demonstrated that the model could precisely predict light radiation intensity over time with different time points and positions in the greenhouse. Based on the example of CSG, a 3D greenhouse model including a detailed 3D tomato canopy structure was constructed to simulate the influence of supplementary reflective films to improve micro-light climate. Here, we propose a supplementary light strategy using reflective films to improve light distribution within plant canopy. Field experiments dealing with light conditions and growth behavior over time, are complicated to carry out, time-consuming and hard to control, while however, accurate measurements of how reflective films influence the micro-light climate of canopy are an essential step to improve the growth conditions for any crop. However, as to our knowledge, the contributions to light distribution within canopy have not been investigated for passive reflector like reflective films. In practice, reflective films are used to improve micro-light climate within plant canopy by homogenizing light distribution and so increasing total plant light interception. The non-uniform growth and development of crops within Chinese Solar Greenhouses (CSG) is directly related to the micro-light climate within canopy. ![]() 6College of Engineering, Shenyang Agricultural University, Shenyang, China.5Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Stadt Seeland, Germany.4Plant Sciences Core Facility, CEITEC-Central European Institute of Technology, Masaryk University, Brno, Czechia.3National & Local Joint Engineering Research Center of Northern Horticultural Facilities Design & Application Technology (Liaoning), Shenyang,China.2Key Laboratory of Protected Horticulture, Ministry of Education, Shenyang, China.1College of Horticulture, Shenyang Agricultural University, Shenyang, China. ![]()
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