Decomposition and nutrient release by green manures in a tropical hillside agroecosystem

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cg.coverage.countryColombia
cg.coverage.iso3166-alpha2CO
cg.coverage.regionSouth America
cg.identifier.doihttps://doi.org/10.1023/a:1015720324392en
cg.isijournalISI Journalen
cg.issn1573-5036en
cg.issue2en
cg.journalPlant and Soilen
cg.reviewStatusPeer Reviewen
cg.subject.ciatSOIL HEALTHen
cg.volume240en
dc.contributor.authorCobo Borrero, Juan G.en
dc.contributor.authorBarrios, E.en
dc.contributor.authorKass, DCLen
dc.contributor.authorThomas, Richard J.en
dc.date.accessioned2014-09-24T07:58:27Zen
dc.date.available2014-09-24T07:58:27Zen
dc.identifier.urihttps://hdl.handle.net/10568/42717
dc.titleDecomposition and nutrient release by green manures in a tropical hillside agroecosystemen
dcterms.abstractThe decomposition and nutrient release of 12 plant materials were assessed in a 20-week litterbag field study in hillsides from Cauca, Colombia. Leaves of Tithonia diversifolia (TTH) and Indigofera constricta (IND) decomposed quickly (k=0.035±0.002 d?1), while those of Cratylia argentea (CRA) and the stems evaluated decomposed slowly (k=0.007±0.002 d?1). Potassium presented the highest release rates (k>0.085 d?1). Rates of N and P release were high for all leaf materials evaluated (k>0.028 d?1) with the exception of CRA (N and P), TTH and IND (P). While Mg release rates ranged from 0.013 to 0.122 d?1, Ca release was generally slower (k=0.008–0.041 d?1). Initial quality parameters that best correlated with decomposition (P>0.001) were neutral detergent fibre, NDF (r=?0.96) and in vitro dry matter digestibility, IVDMD (r=0.87). It is argued that NDF or IVDMD could be useful lab-based tests during screening of plant materials as green manures. Significant correlations (P>0.05) were also found for initial quality parameters and nutrient release, being most important the lignin/N ratio (r=?0.71) and (lignin+polyphenol)/N ratios (r=?0.70) for N release, the C/N (r=0.70) and N/P ratios (r=?0.66) for P release, the hemicellulose content (r=?0.75) for K release, the Ca content (r=0.82) for Ca release, and the C/P ratio (r=0.65) for Mg release. After 20 weeks, the leaves of Mucuna deerengianum released the highest amounts of N and P (144.5 and 11.4 kg ha?1, respectively), while TTH released the highest amounts of K, Ca and Mg (129.3, 112.6 and 25.9 kg ha?1, respectively). These results show the potential of some plant materials studied as sources of nutrients in tropical hillside agroecosystems.en
dcterms.accessRightsLimited Access
dcterms.extentpp. 331-342en
dcterms.issued2002
dcterms.languageen
dcterms.licenseCopyrighted; all rights reserved
dcterms.publisherSpringeren
dcterms.subjectgreen manuresen
dcterms.subjectdegradationen
dcterms.subjectnutrientsen
dcterms.subjectsloping landen
dcterms.subjectabonos verdesen
dcterms.subjectdegradaciónen
dcterms.subjectnutrientesen
dcterms.subjectterreno en decliveen
dcterms.typeJournal Article

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