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- W2165703517 abstract "A laboratory incubation experiment was conducted over a 16-week period to determine decomposition and N release by three green manure legume species, Mucuna (Mucuna pruriens), Lablab (Lablab purpureus cv. Rongai) and Sunhemp (Crotalaria juncea), in three soil types from South Africa. The amount of N mineralized from the residues was determined at 2, 4, 8 and 16 weeks from the onset of incubation. Nitrogen release pattern of the three legume residues followed a similar pattern in all the three soils, with sunhemp treated soil having the highest amount of mineral N after 16 weeks of incubation in all the three soils, followed by lablab and then mucuna. The amount of mineral N ranged from 121 to170, 96 to 134 and 92 to 108 mg kg-1 in the sunhemp, lablab and mucuna treated soils, respectively. The cumulative amounts of N from the legume residues mineralized recovered as mineral N in soil after 16 weeks of incubation ranged from 21 - 41% (92 - 121 mg kg-1), 30 - 68% (108 - 170 mg kg-1) and 26 - 60% (93 - 147 mg kg-1) of the initial added N contained in the residues in the soils with 62, 20 and 12% clay contents, respectively. Less than 50% of the initial added N was mineralized in the high clay content soil. Mineralization rate constant, k, was significantly correlated to the residue N content, net mineralized N, C/N ratio and Lignin/N ratio. Results from this study indicated that all the three legumes could contribute significant amounts of N for uptake by plants, with sunhemp tending to release N at a faster rate, followed by lablab and then mucuna. High clay content in soil slowed down N mineralization. Key words: Green manure legumes, incubation, decomposition, N release, soil type." @default.
- W2165703517 created "2016-06-24" @default.
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- W2165703517 date "2010-01-04" @default.
- W2165703517 modified "2023-09-30" @default.
- W2165703517 title "Decomposition and nitrogen release by green manure legume residues in different soil types" @default.
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- W2165703517 doi "https://doi.org/10.5897/ajar09.489" @default.
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