2013 Fiscal Year Final Research Report

The Effects on Crop Production and Soil Carbon Sequestration of Root Production and Mortality in Paddy Rice using Organic Fertilizer

Research Project

Project/Area Number	23780013
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Multi-year Fund
Research Field	Crop science/Weed science
Research Institution	Tohoku University
Principal Investigator	TAJIMA Ryosuke 東北大学, (連合)農学研究科(研究院), 助教 (60530144)
Project Period (FY)	2011 – 2013
Keywords	水稲 / 有機質肥料 / 根系 / 炭素貯留
Research Abstract	Toward the use of organic matter as an alternative to chemical fertilizers which have recently increased in price, we investigated the root production and mortality of paddy rice using organic matter and crop production and carbon sequestration in relation to the dynamics. In the results, the production and mortality of root of rice using organic fertilizer were more than using chemical fertilizer. Using RothC models with our data, the evaluation of soil carbon sequestration was changed depending on these differences in roots. Our results suggests the effects of root dynamics is greater than the previous evaluations.