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Recovery of Nitrogen by Rice from Blue‐Green Algae Added in a Flooded Soil
Author(s) -
Wilson J. T.,
Eskew D. L.,
Habte M.
Publication year - 1980
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1980.03615995004400060042x
Subject(s) - oryza sativa , crop , nitrogen , rice straw , straw , agronomy , algae , greenhouse , chemistry , environmental science , botany , biology , biochemistry , organic chemistry , gene
Uptake of N from a blue‐green alga ( Aulosira 68) by rice ( Oryza sativa L.) was studied in a greenhouse pot experiment. When a suspension of the alga was buried 5–7 cm deep, 52% of the N added was recovered in the grain and straw of the first rice crop, and an additional 5% was recovered by a ratoon crop and by a subsequent transplanted crop. Additions of NH 4 Cl equivalent to 100 kg N/ha did not affect the recovery of algal N. Surface placement of the alga reduced recovery by the first crop to 37% of the added N.