| Response of potato yield to climate change in semi\|arid region of the Loess Plateau |
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| DOI：10.7606/j.issn.1000-7601.2023.01.23 |
| Key Words: climate change potato production temperature precipitation Loess Plateau |
| Author Name | Affiliation | | QI Yue | Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province, China Meteorological Administration, Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou, Gansu 730020, China | | ZHAO Hong | Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province, China Meteorological Administration, Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou, Gansu 730020, China | | LEI Jun | Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province, China Meteorological Administration, Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou, Gansu 730020, China | | WANG Lijuan | Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province, China Meteorological Administration, Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou, Gansu 730020, China | | LU Yaling | Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province, China Meteorological Administration, Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou, Gansu 730020, China | | ZHAO Funian | Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province, China Meteorological Administration, Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou, Gansu 730020, China | | YANG Yang | Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province, China Meteorological Administration, Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou, Gansu 730020, China | | CHEN Fei | Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province, China Meteorological Administration, Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou, Gansu 730020, China |
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| Abstract: |
| This study investigated the response of potato yields to climate change in semi\|arid areas of the Loess Plateau based on observing potato positioning experiments and data of climate factors. The results showed that the temperature and cumulus temperature increased significantly, with climatic tendencies of 0.32℃·10a-1 and 48.14℃·10a-1 (P<0.01), respectively. Precipitation fluctuated less with a climatic tendency of 3.97 mm·10a-1 (P<0.05). The sunshine hours decreased significantly with a climatic tendency of 10.92 h·10a-1 (P<0.05) in potato growth period during 1960—2020(61 a). However, the temperatures decreased significantly, with a climatic tendency rate of -0.54℃·10a-1 (P<0.01). The trend of decreasing temperature was observed in all reproductive periods with the most obvious decrease in temperature from tuber expansion to maturity at a climatic tendency rate of -1.18℃·10a-1, passing the significance test at 0.01 level in potato growth period during 2005—2020(16 a). Precipitation increased during the potato growth period at a climatic tendency rate of 13.89 mm·10a-1 (P<0.01). Different growth periods had a significant decrease in precipitation during sowing to seedling and tuber formation periods with a climatic tendency rate of 12.32 mm·10a-1. For almost 16 a, the potato growth days were extended and yield decreased. Yield was significantly negatively correlated (P<0.05) with temperature of potato growth period, temperature from tuber expansion to maturity, and cumulative temperature. Yield was highly significantly positively correlated (P<0.01) with precipitation and precipitation threshold of 315.7 mm during the potato growth period. Temperature and precipitation during potato growth period, precipitation during tuber formation, and precipitation from sowing to seedling emergence were key factors affecting potato yield. The study could provide an important reference for potatoes in the semi\|arid zone of the Loess Plateau to cope with climate change and promote healthy development of the industry. |
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