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近年来,化肥、电力、农业机械、燃油等工业能进入农田量逐步增加,农业获得了新的能源支柱;种草造林、发展畜牧业又增加了生物能,使得水土流失区农业生态系统能量流扩大,有效产出能提高。但由于自然条件与物质基础差,起点低,农田能量物质循环仍存在许多问题,需要进一步改善。本文依据我们近期的考察结果,对这一问题进行分析讨论。 一、水土流失区农田投能水平与结构 在调查的7个县
In recent years, industries such as chemical fertilizers, electric power, agricultural machinery and fuel oil have gradually increased the amount of farmland they can enter, and agriculture has gained new energy pillars. The grassland afforestation and livestock husbandry have increased their bioenergy so that the energy flow of agro-ecosystem in soil and water loss areas Expand, effective output can be increased. However, due to the poor natural conditions and material basis and the low starting point, many problems still exist in the energy material circulation of farmland and need to be further improved. This article based on our recent inspection results, to analyze this issue. I. Soil Emission Levels and Structure of Farmland in Soil and Water Loss Areas Under investigation, seven counties