Carbon and nitrogen dynamics as affected by land-use and management change from original rice paddies to orchard, wetland, parking area and uplands in a mountain village located in Shonai region, Northeast Japan

• DOI: 10.1080/00380768.2021.2017235
• Publication Date: 2022-01-06T16:11:49Z
• Authors: Patria Novita Kus...; Putu Oki Bimantara; Julien Guigue; Chihiro Haga; Yuta Sasaki; Valensi Kautsar; Samuel Munyaka Ki...; Toan Nguyen-Sy; Shuirong Tang; Benito Heru Purwanto; Sri Nuryani Hiday...; Keitaro Tawaraya; Kazuaki Sugawara; Weiguo Cheng
• Keywords: Orchard; Paddy field; Soil carbon

This study investigated the effect of land-use and management change (LUMC) on carbon (C) nitrogen (N) dynamics after 15–40 years. LUMC constituted from rice paddies to chestnut orchard, wetland, buckwheat upland fields in Shonai region, Yamagata Prefecture, Northeast Japan. Soil samples were collected top – (0–15 cm) sub-layers (15–30 for analysis soil organic C (SOC) its δ13C value, total N (TN), their stocks. decomposition (Dec-C) net mineralization (Net Min-N) determined according production CO2 NH4+ + NO3– by aerobic incubation CH4 anaerobic incubation, respectively. The results reveal that 40 years paddy orchard SOC TN contents top-layer not significantly altered. However, parking area where vegetation was absent, content decreased significantly. Conversion amur silver grass wetland altered most, leading an increase 5.1‰ 2.9‰ sub-layers, In general, experiment revealed a did decrease Dec-C Net Min-N. Whereas, Min-N both conditions. We conclude over decades had various effects stocks as well potentials.