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Objective

Swine manure in Korea is separated into solid and liquid phases which are composted separately and then applied on land. The nutrient accumulation in soil has been a big issue in Korea but the basic investigation about nutrient input on arable land has not been achieved in detail. Within the nutrient production from livestock at the national level, most values are calculated by multiplication of the number of animals with the excreta unit per animal. However, the actual amount of nutrients from swine manure may be totally different with the nutrients applied to soil since livestock breeding systems are not the same with each country.

Methods

This study investigated 15 farms producing solid compost and 14 farms producing liquid compost. Composting for solid phase used the Turning+ Aeration (TA) or Turning (T) only methods, while liquid phase aeration composting was achieved by continuous (CA …