Characteristics of compound low-temperature and limited-light events in southern China and their effects on greenhouse grown strawberry
2022
Zhang, Qi | Zhang, Xinyu | Zheng, Qiantong | Yao, Man | Yang, Zaiqiang
The environmental stress, pests and diseases are frequently occurred during production of facility agriculture in China. Among them, adverse meteorological conditions, such as low temperature and limited light, often co-occurred in greenhouses and brought great losses in southern China. Nevertheless, there is little knowledge about agrometeorological disasters in facility, especially for co-occurred climate extremes. Here, we applied machine learning methods to simulate long-term daily minimum temperature in plastic greenhouses, so as to assess the spatio-temporal characteristics of compound low-temperature and limited-light events (LTLL) in southern China. We took strawberry as the representative horticulture plant to quantitatively investigate the potential effects of the LTLL stress based on experimental data. It was found that when the LTLL stress occurred, strawberry was more sensitive to low-temperature than limited-light and duration. The losses of the fruit soluble solids content caused by LTLL stress were relatively lower than that of yield. The LTLL events mainly occurred from November to March of the following year in southern China. The occurrence frequency had a decreasing trend during 1990–2019 at 3.4 d/10 a, which mainly resulted from its reduction in spring. Assuming that all the LTLL events occurred at strawberry flowering stage, ~ 11.71% of them could result strawberry fruit yield losses over 70%, and the most serious LL events mainly occurred in December and January. The northern part of southern China had a higher LTLL risk. The results have the potential to provide guidance for plastic greenhouse layout and strawberry production.
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