Dry matter yield of Japanese millet (Echinochloa crusgalli var. Frumentacea (Roxb.) Wight) , chemical properties and microbial population of soil as affected by the application of fermented sawdust swine manure in Cheju volcanic ash soil area

Kim, M.C.; Kim, T.G.; Lee, J.E.; Moon, B.C.

Journal of the Korean Society of Grassland Science 25(3): 159-168


Accession: 004113132

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This experiment was carried out during May to October 1998 to determine the effect of fermented sawdust swine manure application (SSM) on the herbage production of Japanese millet (Echinochloa crus-galli var. frumentacea) and soil properties in the Cheju brown volcanic ash soil, Korea Republic. The treatments were: T1: basic chemical fertilizer, N 200 kg/ha + P2O5 300 kg/ha + K2O 200 kg/ha; T2: 1/2 basic chemical fertilizer, N 100+P205 150 + K2O 100 kg/ha; T3: 1/2 basic SSM, N 100 kg/ha; T4: basic SSM, N 200 kg/ha; T5: 2 times basic SSM, N 400kg/ha; T6: 4 times basic SSM, N 800 kg/ha. At the same application level of N 200 kg/ha, the application of 100% chemical fertilizer (T1) had significantly lower dry matter yield than that of 50% chemical fertilizer and 50% SSM (T2) or 100% SSM (T4). Dry matter yield increased with an increase of SSM to N 400 kg/ha, but decreased at N 800 kg/ha. P, K and Ca contents of Japanese millet tended to decrease with an increase in SSM level. The application of chemical fertilizer lowered the P and K content of Japanese millet in comparison with that of SSM. pH, available phosphorus, exchangeable potassium, Ca, Mg content of soil showed a significant increase with an increase of SSM application level. However, at the same application level of N 200 kg/ha, there was no statistically significant difference between chemical fertilizer and SSM in the soil. The bacterial number of soil among microbial population increased with an increase of SSM level in June 1988, but there was no regular tendency in October. The ratio of bacteria to fungus in soil had a tendency to decrease with an increase of SSM level. It is recommended to use N 400 kg/ha of SSM or N 100 kg/ha of chemical fertilzer + N 100 kg/ha of SSM for Japanese millet.