거대억새 단지 조성에 따른 토양 특성 변화
Change in Soil Properties after Planting Giant Miscanthus
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초록
Miscanthus has received wide attention as an option for biomass production in Korea, recently. New strain of giant miscanthushas been developed and was planted in two large trial sites (184 ha) in the lower reaches of the Geum River. To evaluate thesusceptibility of the giant miscanthus as an bioenergy crop for the future, we investigated the influence of the giant miscanthus onthe soil properties. The particle size, CEC, pH, EC, T-N, T-P, heavy metal total concentration, and heavy metal fractions of soilsamples collected from abandoned field, 1 year old giant miscanthus field (1st Year GM), and 2 year old giant miscanthus field(2nd Year GM) at different depths of 0～15, 15～30, and 30～45 cm in April and August were analyzed. Results showed that theCEC and pH of the soil of the giant miscanthus field were lower than those of the soil of abandoned field. The EC of 2nd GMwas lower than that of abandoned field, indicating that the giant miscanthus may facilitate soil desalination process. The organic andsulfide fraction and residual fraction of heavy metals in the giant miscanthus field was higher than in abandoned field, due to thelow pH of the giant miscanthus field and the excretion of phytosiderophores by rhizome of the giant miscanthus. This study showedthat the giant miscanthus can influence on the soil properties and further study for long term is needed to elucidate the interactionbetween the soil and the giant miscanthus.
Abstract
Miscanthus has received wide attention as an option for biomass production in Korea, recently. New strain of giant miscanthushas been developed and was planted in two large trial sites (184 ha) in the lower reaches of the Geum River. To evaluate thesusceptibility of the giant miscanthus as an bioenergy crop for the future, we investigated the influence of the giant miscanthus onthe soil properties. The particle size, CEC, pH, EC, T-N, T-P, heavy metal total concentration, and heavy metal fractions of soilsamples collected from abandoned field, 1 year old giant miscanthus field (1st Year GM), and 2 year old giant miscanthus field(2nd Year GM) at different depths of 0～15, 15～30, and 30～45 cm in April and August were analyzed. Results showed that theCEC and pH of the soil of the giant miscanthus field were lower than those of the soil of abandoned field. The EC of 2nd GMwas lower than that of abandoned field, indicating that the giant miscanthus may facilitate soil desalination process. The organic andsulfide fraction and residual fraction of heavy metals in the giant miscanthus field was higher than in abandoned field, due to thelow pH of the giant miscanthus field and the excretion of phytosiderophores by rhizome of the giant miscanthus. This study showedthat the giant miscanthus can influence on the soil properties and further study for long term is needed to elucidate the interactionbetween the soil and the giant miscanthus.
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