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本研究分析了山地农业生态系统中作物生产的能量估算,讨论了农业生态系统和自然生态系统的关系。耕地按种植方式划分为(Ⅰ)主种蔬菜的模式,(Ⅱ)主种小麦的模式。输入、输出的能值表明,在所有的种植模式中,小麦一大豆的输入最小,马铃薯-白菜-马铃薯的输入最大。主种蔬菜的生态系统比起主种小麦的生态系统来,输入的化肥多24倍,粪肥多150倍,种子多5倍,人力多5倍,而产生能的输出只多0.7倍。山地农业在很大程度上依赖于周围的森林生态系统,也代表着巨大的能量消耗中心。
This study analyzed the energy estimates of crop production in mountain agroecosystems and discussed the relationship between agro-ecosystems and natural ecosystems. Cultivated land by planting mode is divided into (Ⅰ) the main vegetable patterns, (Ⅱ) the main wheat pattern. The values of input and output show that the input of wheat-soybean is the smallest among all planting patterns and that of potato-cabbage-potato is the largest. The main vegetable ecosystem has 24 times more input fertilizers, 150 times more manure, 5 times more seeds, 5 times more manpower and only 0.7 times more energy than the main wheat ecosystem. Mountain farming relies heavily on the surrounding forest ecosystem and also represents a huge energy consumption center.