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Chinese Agricultural Science Bulletin ›› 2025, Vol. 41 ›› Issue (14): 101-110.doi: 10.11924/j.issn.1000-6850.casb2024-0083

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Effect of Precipitation Heterogeneity in 24 Solar Terms on Yield and Growth Stage of Lycium barbarum in Qaidam Basin

XU Xuelian1,2(), YAN Liangdong3(), MA Jun1(), LEI Yuhong1, WEN Shengxiang1, CHEN Liwen1   

  1. 1 Geermu Meteorological Bureau, Geermu, Qinghai 816099
    2 Qinghai Key Laboratory of Disaster Prevention and Mitigation, Xining 810001
    3 Qinghai Institute of Meteorological Sciences, Xining 810001
  • Received:2024-02-05 Revised:2025-01-17 Online:2025-05-15 Published:2025-05-14

Abstract:

In order to study the heterogeneity of precipitation in the 24 solar terms in Qaidam Basin and its influence on the yield and growth stage of Lycium barbarum, daily precipitation data from 10 stations in Qaidam Basin during 1961-2020 were used by mathematical statistics, inverse distance weight interpolation (IDW) method, Mann-Kendall mutation test and other statistical methods. The characteristics of temporal and spatial variation, periodic variation and mutation test of precipitation concentration and concentration period in 24 solar terms were analyzed. The results showed that the annual precipitation of the 24 solar terms showed an overall increasing trend and decreased from east to west in space. The Cv value of precipitation in the west was obviously greater than that in the east, and the precipitation showed a decreasing trend in 2000 and an increasing trend in 2001. PCD showed an insignificant decreasing trend, and the precipitation distribution tended to be uniform. The maximum value was 0.83 (in 1984), and the minimum value was 0.55 (in 2007). The spatial distribution was different, showing a small-large-small-large change pattern from east to west. PCP showed an insignificant advance trend, the highest value appeared between‘Great Heat’and‘Start of Autumn’, and the lowest value appeared between‘Grain Buds’and‘Grain in Ear’, and showed a ‘late-early-early-late-early’ spatial distribution from east to west. There was no mutation of PCD in 60 years. There were 5 mutations in PCP, 3 mutations were decreased and 2 mutations were increased. The precipitation of the 24 solar terms has a significant effect on the yield of Lycium barbarum, but the precipitation concentration and the precipitation concentration period of the 24 solar terms have little effect on the yield of Lycium barbarum. The influence of precipitation, concentration degree and concentration period of the 24 solar terms on the key stage of Lycium barbarum growth in Qaidam Basin is completely different.

Key words: 24 solar terms, precipitation, heterogeneous change, Lycium barbarum, yield, development period, Qaidam Basin