Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS

Response of Agricultural Phenospectrum to Global Climate Change in Loess Plateau of East Gansu Province

  • 1. Institute of Arid Meteorology,CMA,Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province,Lanzhou 730020,China;
    2. Department of Agronomy,Longdong College,Qingyang745000,China;
    3. College of Life Science,Beijing Normal University,Beijing 100875,China;
    4. Xifeng Agro-meteorological Experiment Station in Gansu Province,Qingyang 745000,China

Received date: 2005-11-21

  Revised date: 2006-03-16

  Online published: 2006-08-25


According to years of synchronous observations of growth spectrum of Dongzhiyuan main crops(e.g.winter wheat) and main fruit trees(e.g.apple,pear) and climatic change,this paper analyzes the ecological response of crop growth spectrum to the climatic change in Loess Plateau of east Gansu province.The result indicates that the mean annual temperature has presented an increasing trend notably in the last 35 years in Dongzhiyuan,and dominated by winter and spring warming(winter wheat over-wintering period temperature increase linear trend reaches 0.067 2℃/a),basically identical with the warming trend of global climate.It reaches 0.050 7℃/a,which is much higher than the mean national temperature increase range since the 1960s and also higher than the Loess Plateau in east Gansu province(0.034 8℃/a) in the last 35 years.It is also the central area in temperature increase in the study area.This further confirms that the eastern part of Northwest China is one of the regions witnessing greater temperature increase range.The impact of climate warming on ecology of winter wheat and fruit tree ia mainly reflected in advance in growth stage generally in spring in Dongzhiyuan and winter wheat over-wintering stage shortens notably(the shortened linear trend reaching 0.674d/a).However,winter wheat and fruit tree growth intervals at various phases do not present shortening trend.And because the locally plant winter wheat variety is strong winter enduring and long sunshine tolerate variety,the advancement in growth period causes the shortening of sunshine time,restricts crop or plant growth to a certain degree and offsets partly,the temperature increase effect.Therefore,the linear trend of fruit tree puberty in advance in spring is more obvious than the winter wheat.With regard to fruit tree,the linear trend of puberty of pear tree in advance is more obvious than the apple tree in spring.The conclusion is that the impact of climatic change is both advantageous and disadvantageous to agriculture.So the relevant agricultural administrative department should follow the local climatic change characteristics to adjust the cropping pattern in time,optimize the mode of planting,go after profits and advoid disadvantages,fully excavate the resource potentiality of the climate and improve the agricultural economic benefits.

Cite this article

GUO Hai-ying, ZHAO Jian-ping, SUO An-ning, YANG Xing-guo, HUANG Bin, GE Jian-ping . Response of Agricultural Phenospectrum to Global Climate Change in Loess Plateau of East Gansu Province[J]. JOURNAL OF NATURAL RESOURCES, 2006 , 21(4) : 608 -614 . DOI: 10.11849/zrzyxb.2006.04.014