Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2016, Vol. 32 ›› Issue (35): 166-170.doi: 10.11924/j.issn.1000-6850.casb16040063

Special Issue: 农业气象

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Climate Characteristics of Frost-Free Period: In Recent 50 Years in Western Guanzhong

Wang Chunjuan   

  1. (Fengxiang Meteorological Bureau, Fengxiang Shaanxi 721400)
  • Received:2016-04-12 Revised:2016-06-22 Accepted:2016-06-24 Online:2016-12-26 Published:2016-12-26

Abstract: The paper aims to study the change laws of frost-free period and its influence in western Guanzhong, Shaanxi Province, under the background of climate change. The author chose the temperature and the first (last) frost day data of 11 meteorological stations in Baoji from 1961 to 2010, and used climate change theory to conduct statistical analysis. The results showed that: in recent 50 years, the first frost day was delayed with a tendency rate of 1.77 d/10 a on average in Baoji, and the last frost day advanced with a tendency rate of 1.72 d/10 a, which made the frost-free period significantly extend with a tendency rate of 3.11 d/10 a. The first frost day, the last frost day, and frost-free period had a turning point in 1974, 1982, 1982, respectively. The extension of frost-free period had positive effects on agricultural production.Key words: change characteristics; first (last) frost day; frost-free period; western Guanzhong