JOURNAL OF NATURAL RESOURCES ›› 2000, Vol. 15 ›› Issue (2): 149-154.doi: 10.11849/zrzyxb.2000.02.011

• Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS • Previous Articles     Next Articles

Impacts of climate on wheat yield and their changes in Henan Province

QIAN Huaisui1, WEI Donglan2   

  1. 1. College of Environment and Planning,Henan University,Kaifeng 475001,China;
    2. Geography Department,Liaoning Normal University,Dalian 116029,China
  • Received:1999-04-06 Revised:1999-07-26 Online:2000-06-25 Published:2000-06-25

Abstract: The climatic impacts on wheat yield and their transitivity are very obvious in Henan Province which is crossed by the transitional zone between the subtropical and temperate zone.This paper extracts the weather yield data from yield time series using the orthogonal polynomial method and analyses the impacts of climatic change on wheat yields by the integral regression method.On the basis of the above work,according to the regional distribution of the total affecting coefficients and their ranges of precipitation,temperature and sunshine duration,firstly it divides Henan Province into 4 affecting regions of precipitation,4 affecting regions of temperature and 5 affecting regions of sunshine duration respectively; secondly,using the method of running integral regression,it analyses the changes of climatic impacts on the wheat yields in the subtropical and temperate zones respectively; and finally,it discusses the possible impacts of the future climate changes on the wheat yields and adaptability.

Key words: climate, wheat yield, Henan Province