关键词: 连作, 连作, 烤烟, 生物量, 土壤酶

Abstract: The agricultural economy information was studied about 26 countries of the top 100 counties in Shandong Province in 2008, the total power of agricultural machinery such as the 10 indicators was emphasized, these indicators was applied with the comprehensive analysis of the principal component , so the principal component matrix was established about the agricultural economy information, the status of the agricultural economy information was analyzed with quantitative method about 26 countries of the top 100 counties. Based on GIS technology, the spatial pattern of the agricultural economy information was visualized, morever, the paper also explored the comparative advantage of 26 countries of the top 100 counties in Shandong province.