Effects of land-use and organic fertilization on soil enzyme in a farmer’s fields

Ushiwata Silvio Yoshiharu, Kawashima Ayana, Oshima Hiroyuki, Kato Taku, Yashima Miwa, Inubushi Kazuyuki

doi:10.18946/jssm.78.1_20

The soil quality is measured through the use of indicators that measure or reflect the environmental status or sustainability condition of the ecosystem. Microbial attributes are classified as biological indicators. The use of these indicators in the soil analysis routine are promising. In this research, the effect of two land uses (paddy or upland field) with two different soil management (conventional system or conventional system with previous organic matter applied) on soil microbial properties was evaluated in a farmer’s field. The soil enzymatic activities (urease, glucosidase and arylsulfatase), with exception of acid phosphatase, showed sensitive and consistent responses to the effect of soil management.　The results showed higher soil enzymatic activity in paddy than upland field. Total C and N were 1.3-1.8 times increased by organic amendments as well as N mineralization 1.8-2.4 times, while enzyme activities in upland soil 1.5-2.4 times, although 0.7-1.3 times in paddy soil. In both land-uses, the large amount of organic fertilizer applications in previous organic amendments contributed to improve the soil chemical properties and soil microbiological activities.

Effects of land-use and organic fertilization on soil enzyme in a farmer’s fields

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