Investigation of microbial communities for nitrogen cycle in the 3 types forest managements of artificial Japanese cedar forest

2016 Fiscal Year Final Research Report

• Project/Area Number: 26450477
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Environmental agriculture(including landscape science)
• Research Institution: Tohoku University
• Principal Investigator: Chika Tada 東北大学, 農学研究科, 准教授 (30413892)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 森林管理 / 土壌微生物 / 窒素循環 / 間伐強度

Outline of Final Research Achievements

The microbial community structure related to nitrogen circulation by forest management of Japanese cedar plantation forest was investigated. The management was compared in the unmilling area, the weak thinning area, and the intensity thinned area. Each soil was collected and analyzed for the nosZ gene of N2O reductase. As a result, the amount of nos Z gene was higher in the intensity thinned plot than in the other plots. In addition, the species composition was also detected only in the thinning plot, closely related to Bradyrhizobium japonicum USDA 110 strain known as soybean root nodule bacteria. Undergrowth vegetation in the intensity thinned section had legume plants not found in other plots. Therefore, bacteria with high denitrification ability existed due to the influence of undergrowth vegetation in the intensity thinned plot, and as a result, the possibility that nitrogen removal was high was considered.

Free Research Field

環境微生物