| Identifying the determination climatic factors of potato yield variation in Bashang area of Hebei Province |
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| DOI：10.7606/j.issn.1000-7601.2019.06.35 |
| Key Words: potato growth period yield climatic factors effective precipitation Bashang area |
| Author Name | Affiliation | | TANG Jianzhao | Engineering Technology Research Center, Geographic Information Development and Application of Hebei, Institute of Geographical Sciences, Hebei Academy of Sciences, Shijiazhuang, Hebei 050011, China | | XIAO Dengpan | Engineering Technology Research Center, Geographic Information Development and Application of Hebei, Institute of Geographical Sciences, Hebei Academy of Sciences, Shijiazhuang, Hebei 050011, China | | WANG Jing | College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China | | GUO Xinze | Zhangbei Meteorological Bureau, Zhangbei, Hebei 076450, China |
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| Abstract: |
| Potato production in Bashang area was under rainfed condition and potato yield varied greatly in this region. The determination factors of the variation of potato yields were analyzed based on the experiment and climate data during the potato growing season of 2010-2017. Also, the variation of meteorological factors in potato growing season from 1961 to 2017 was analyzed. The results indicated that total solar radiation in growing season showed decrease trend from 1961 to 2017 in Bashang with a decrease rate of 66 MJ·m-2 per decade. The minimum and maximum temperatures increased by 0.5℃ and 0.4℃ per decade, respectively. The precipitation change during growing season was not significant, however, its variation was great inter-annually. Potato yield was generally increased from 8 250 to 24 500 kg·hm-2， across the experimental years of 2010-2017 with avariation coefficient of 27.8%. Total solar radiation during growing period had positive effects on potato yield, however, not significant (P＞0.05). Maximum temperature during the periods of emergence to tuberization (R2=0.31, P＜0.05) and tuberization to tuber bulking (R2=0.52, 》P＜0.01) had significant negative effects on potato yield. The maximum continuous days without effective precipitation during tuber bulking to maturity determined 68% of the variation of potato yields under experimental years. The variation of potato yields could be determined 82% by the variations of maximum continues days without effective precipitation and the total effective precipitation during tuber bulking to maturity, maximum temperature and total solar radiation during tuberiztion to tuber bulking. Total precipitation in growing period was not the determination factor for potato yields in Bashang, and the yield was more correlated with effective precipitation. Enhancing the effectiveness of precipitation and cultivating more heat tolerance cultivars would be the effective measures to enhance potato yield in Bashang in the future. |
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