关键词: 农耕期, 农耕期初日, 农耕期终日, 积温

Abstract: Based on the meteorological data of 86 meteorological stations in Shandong province from 1961 to 2008 and digital elevation models (1∶250000),the farming period was calculated by using regression analysis method.Statistical analysis and spatial analysis were carried out 15 grid layers with beginning date and ending date of farming period by GIS.The results showed that the beginning date of farming period started at southwest,and moved gradually to northeast,Shandong peninsula and the central mountain in Shandong province was late.The ending date of farming period started at the central mountain in Shandong province,and moved gradually to southeast,Lunan and southeast coast was late.The average farming days increased from north to south.The beginning and ending date of farming period was delayed during 1970s,and advanced during 2001-2008,while the ending date of farming period was on the contrary.The farming period increased at the rate 4.2 days per 10 years from 1961 to 2008.The accumulated temperature of ≥0℃ or ≥10℃ increased at the rate 46.3℃/10y and 23.13℃/10y,respectively.

Key words: Farming period, Farming period, Beginning date of farming period, Ending date of farming period, Accumulated temperature