研究目的
To explore the application of diffuse light film in a Chinese solar greenhouse (CSG) and investigate its effects on plant growth, yield, and quality.
研究成果
Diffuse light films with higher haze (36.2% and 39.7%) improved light homogeneity, temperature, and humidity in CSGs, leading to enhanced plant growth, biomass accumulation, yield increases (e.g., 17% for tomatoes, 21.9% for cucumbers), and better fruit quality. They also promoted earlier flowering in cucumbers and extended growth cycles. The films are beneficial for accelerating growth and production in solar greenhouses, with recommendations for further research on underlying mechanisms and broader applications.
研究不足
The study was preliminary and conducted in specific regions (Beijing, Ningxia, Shandong), which may limit generalizability. Environmental conditions like cloudy days were not fully explored, and the principles behind temperature and humidity changes need further study. The effect on seedling dry matter was not proven.
1：Experimental Design and Method Selection:
Comparative trials were conducted in CSGs in Beijing, Ningxia, and Shandong provinces using diffuse light films with different haze levels (16.8%, 36.2%, 24.2%, 39.7%) compared to control films. The design involved testing on tomatoes and cucumbers for seedling and cultivation phases.
2：8%, 2%, 2%, 7%) compared to control films. The design involved testing on tomatoes and cucumbers for seedling and cultivation phases.
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: Experiments were performed at specific sites: Key Laboratory of Facility Agriculture Engineering of China Agricultural University and Tongzhou Base in Beijing, Shouguang City in Shandong Province, and Wuzhong National Agricultural Park in Ningxia Province. Crops included tomatoes (cultivars Zhongza 106, Tyco Pink) and cucumbers (cultivars Zhongnong No16, Del 99, Bo Powder).
3：List of Experimental Equipment and Materials:
Polyethylene flow-drop aging-resistant films (models A3.6, B3.6, A4.2, B4.2) provided by Borouge Trading (Shanghai) Co., Ltd. were used. Measurements included plant height, stem diameter, biomass, leaf SPAD value, leaf number, leaf area, fruit number, yield, and fruit quality.
4：6, B6, A2, B2) provided by Borouge Trading (Shanghai) Co., Ltd. were used. Measurements included plant height, stem diameter, biomass, leaf SPAD value, leaf number, leaf area, fruit number, yield, and fruit quality.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: Films were applied to greenhouses of varying sizes. Physiological indicators were measured at 7-day intervals for seedlings and 15-day intervals for cultivation. Environmental factors like humidity, temperature, and light (PPFD) were monitored on typical days.
5：Data Analysis Methods:
Statistical analysis was performed to compare treated and control groups, with significance levels (p<0.05) indicated for differences in growth parameters and yields.
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