Evaluation of sustainable development of agriculture in Tianjin by DPSIR model

Based on DPSIR model，an assessment indicator evaluation system of sustainable development of agriculture in Tianjin from five aspects（ i.e. driving force，pressure，state，impact and response） was established，and principal component analysis was used to assess the level of sustainable development of agriculture in Tianjin from 2007 to 2013. The results show that the score of sustainable development of Tianjin agriculture increases year by year，from -1.092 7 in 2007 to 1.134 3 in 2013，which signifies an obvious steady increase of sustainable development level of Tianjin agriculture as a whole. However，the five subsystems are uneven by developed. The pressure on development of Tianjin agriculture system decreases gradually， which reduces the obstruction to the sustainable development of Tianjin agriculture. The steady development of Tianjin rural society and economy，acceleration of urbanization，and growing economy scale，promote a sound sustainable development of Tianjin agriculture. The state subsystems of society，resource and environment under Tianjin agriculture system develop well. The response subsystem restricts the sustainable development of Tianjin agriculture，and appropriate measures should be taken to promote and achieve sustainable development of Tianjin agriculture. In general，although the level of sustainable development of Tianjin agriculture increases year by year in recent years，there is still needed much improvement.