Chinese Journal of Agrometeorology ›› 2017, Vol. 38 ›› Issue (05): 308-320.doi: 10.3969/j.issn.1000-6362.2017.05.005

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Climatic Suitability Assessment of Dangshansu Pear in the Area along the Abandoned Channel of the Yellow River Based on Cloud Model

LI De, ZHOU Wen-lin , SUN Yi, SUN Hui-he   

  1. 1. Suzhou Meteorological Bureau in Anhui Province, Suzhou 234000, China; 2. Hefei Meteorological Bureau in Anhui Province, Hefei 236001
  • Received:2016-09-08 Online:2017-05-20 Published:2017-05-22

Abstract:

The impact of climate conditions on the growth and development of Dangshansu pear is evaluated. It is great significance in coping with climate change, regional climate resources development and utilization. In this paper, the representative origin named Dangshan County of Dangshansu pear in the area along the abandoned channel of the Yellow River is selected as the sampling point. Based on the cloud model theory, the climatic suitability of light, temperature and water were established by using long-term observation data and meteorological monitoring data in the phenophase of Dangshansu pear. The climatic suitability of different phenological periods and interannual ages were determined by weighted combination method and geometric mean method. The results showed that the sunshine suitability could be described by the left half cloud model and the temperature and precipitation suitability could be described by trapezoidal cloud. The correlation coefficients of integrated climatic suitability with actual yield, climate yield and yield per plant were 0.4452 (P<0.05), 0.3734 and 0.5620 (P<0.01), respectively. From 1961 to 2015, the variation trend of climate suitability of Dangshansu pear is not obvious, but in 1961-1989 and 1990-2010, it is the higher and lower period of climate suitability respectively. In 1987, the accumulated anomaly of climate suitability is the largest. During the study period, the temperature suitability increased remarkably, increasing by 0.0274·10y-1. The suitability of sunshine and precipitation has no obvious variation trend. The average of precipitation suitability is lower than that of sunshine and temperature, and the coefficient of variation is four times of that of sunshine and temperature suitability. The climatic suitability of each phenological period did not show a trend change, but the climatic suitability of sprouting stage and flowering stage was low (between 0.50 and 0.53), and the coefficient of variation was large (between 45.0 and 57.0).The climatic suitability and coefficient of variation of other phenological periods were relatively small. In the background of climate change, the increase of temperature is beneficial to the growth of pear. The management of germination and flowering period should be strengthened in the production of Dangshansu pear to enhance the climate suitability of pear trees.

Key words: Cloud model, Trapezium cloud, Left half cloud, Sunshine, Temperature and precipitation climate suitability, Dangshansu pear