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Availability of nitrogen supply from cover crops during residual decomposition by soil microorganisms and its utilization by lettuce (Lactuca sativa L.)

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Title: Availability of nitrogen supply from cover crops during residual decomposition by soil microorganisms and its utilization by lettuce (Lactuca sativa L.)
Authors: Chinta, Yufita Dwi Browse this author
Uchida, Yoshitaka Browse this author →KAKEN DB
Araki, Hajime Browse this author →KAKEN DB
Keywords: Hairy vetch
Rye
Inorganic N
Nitrogen Use Efficiency
β-glucosidase
Soil microbial biomass
Issue Date: 25-Aug-2020
Publisher: Elsevier
Journal Title: Scientia Horticulturae
Volume: 270
Start Page: 109415
Publisher DOI: 10.1016/j.scienta.2020.109415
Abstract: Utilizing inorganic nitrogen (N) derived from cover crop decomposition by subsequent plant cultivation is important. Its correlation with microbial beta-glucosidase enzyme (BG) activity and soil microbial biomass (SMB) as well as cover crop types remains poorly known. Hence, we evaluated the effects of rye, hairy vetch (HV), and their mixture (rye + HV) on nitrogen use efficiency (NUE) by lettuce and soil biochemical properties in fields and pots. Lettuce was rotated with cover crops and examined for N content. Soils at 0-10 cm deep were measured for biochemical status. Lettuce NUE was maximum in rye + HV (47.5%) and HV (27.1%); thus, soil inorganic N supplied in decomposition was efficiently used. Meanwhile, rye retained soil inorganic N concentration (lettuce NUE, - 2.31%). Compared with control, HV sequentially promoted BG activity and SMB for 8 and 2 times during the N mineralization process, respectively, assuming the roles of soil microorganisms on inorganic N regulation from cover crop residues. Rye and rye + HV increased BG activity and SMB over the control, at particular timing, showing their potential in maintaining those microbial attributes in the decomposition process.
Rights: https://creativecommons.org/licenses/by/4.0/
Type: article
URI: http://hdl.handle.net/2115/78954
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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