关键词: 川西高原, 雪被覆盖, 窄叶鲜卑花, 凋落物分解, 养分

Abstract: Agro ecology originates from general ecology,but its theory and methodology are quite specific.In order to make agroecology better serve the protection of ecological environment and the development of agricultural production,it's necessary to develop the theory of agroecology,replenish its basic knowledgeand strengthen the training of basic technical ability in agroecology teaching.

Key words: western Sichuan plateau, snow cover, Sibiraea angustata, litter decomposition, nutrient.