中文摘要：

本文分析了现代农业作物经济可持续发展的关键因素,提出高效低投入生态农业概念及其最佳生产模式。认为多年生粮食作物品种培育和推广,规模化机械化生产,提高复种指数、加强救荒填闲可以获得全年高产和稳产,充分利用作物的多重用途发展相关产业,是现代农业生产高效率的关键基础。由于多年生荞麦等多年生粮食作物的高度抗旱耐瘠薄性和防止水土流失特性,以此为基础的高效低投入生态农业模式特别适合喀斯特山区的农业生产。

英文摘要：

After analyzing the key factors of sustainable development of modem crop agricultural economy, the concept of ecological agriculture with low - input and high - output and its best model were put forward. It is suggested that variety breeding of perennial grain crops and their promotion, commercial and mechanization production, increasing multiple crop index, calamity relief and catch cropping for stable annual value, and developing related industries based on multiple uses of crops are key basis of high effectiveness of modern ag- riculture production. Since perennial grain crops such as perennial buckwheat with highly endurance to drought and barren and highly protection for water and soil, the ecological agriculture with low - input and high - output based on them is fit for agricultural production in Karst mountain area.