논 생태계 관리방법에 따른 에너지 수지 = Originals : Energy Balance in Various Management of Paddy Ecosystem

다국어 초록 (Multilingual Abstract)

A set of surveys was performed at Chungchongbuk-Do in 1997 in order to analyze energy related in rice production. Four cases in rice farming were surveyed : traditional farming, no chemical farming, duck farming, mud snail farming. The farmer in traditional fanning has used chemical fertilizers and chemicals such as general farmers. The farmer in no chemical farming has used chemical fertilizers and manure but has not use chemicals. The farmer in duck farming has not used chemical fertilizers and chemicals but brought up duck in paddy. The farmer in mud snail has not used chemical fertilizers and chemicals but brought up mud snail in paddy. The animals n paddy as like duck and mud snail not only eat weeds and insect but also input fertile material by excretion. The results of energy analysis are as follows 1. In view of energy, the duck farming was the most efficient of four cases. The mud snail farming was less efficient than the duck farming, the traditional farming was less efficient than the mud snail farming, the na chemical farming was less efiicierrt than the traditional farming. 2. Relatively to amount of product, non renewable energy was used more in traditional farming than other cases and renewable energy was used more in no chemical farming than other cases. 3. The reason of low energy efficiency in the no chemical farming was to input fertilizers and manure so much. So to input nutrients excessively in order not to use chemicals can make rice farming to be inefficient in a view of energy. 4. The farming to bring up animals in paddy was more sustainable than other cases because input of non renewable energy could be decreased. But in order to make it to be more sustainable, should be developed cultivation method to decrease input of non renewable direct energy such as fossil fuel and electricity .