Abstract
In agroforestry systems, loppings from trees and shrubs are commonly used, often as mulch, as sources of nutrients for interplanted crops. Therefore, it is important to understand the rates of mulch decomposition. This paper reports the results of a study on the decomposition and nitrogen (N)-mineralization patterns of the leaves, small twigs, and mulch (leaves plus twigs) of Leucaena leucocephala and Cassia siamea in a field experiment in an Alfisol in semiarid Kenya. Plant materials contained in 5mm nylon bags were placed below or on the soil surface in an alleycropping system involving the two tree species, with maize (Zea mays L.) as the intercrop. For plant materials of both species (except Leucaena leaves), there were two phases of decompositions: an initial rapid phase and a slower second one; Leucaena leaves had only a single phase. When placed below the soil surface, the decomposition rates of both Leucaena and Cassia mulch were similar (about 12% week-1 in the first phase and 1% week-1 in the second phase). When placed on the soil surface, Leucaena mulch decomposed 1.3 times more rapidly than Cassia mulch in the first phase. The patterns of N release from the mulch of both species were similar to those of mass loss. In general, mulch-decomposition and N-release rates of both species were related more to their C:N ratios than to polyphenol contents; while C:N ratio predicted the rate of first (rapid) phase, the rate of the second (slow) phase appeared to be regulated by lignin and polyphenol contents.
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References
Allison F E 1973 Soil organic matter and its role in crop production. Developments in Soil Science 3. Elsevier, Amsterdam.
Baldwin I T, Olson R K and Reiners W A 1983 Protein binding phenolics and the inhibition of nitrification in sub-alpine balsam fir soils. Soil Biol. Biochem. 15, 419–423.
Bartholomew W V 1965 Mineralization and immobilization of nitrogen in the decomposition of plant and animal residues. pp 287–306. In Soil Nitrogen. Eds. W V Bartholomew and F E Clark Am. Soc. Agron., Madison, WI, USA.
Budelman A 1988 The decomposition of the leaf mulches of Leucaena leucocephala, Gliricidia sepium and Flemingia macrophylla under humid tropical conditions. Agrofor. Syst. 7, 33–45.
Cochran V L 1991 Decomposition of barley straw in a sub-arctic soil in the field. Biol. Fert. Soils 10, 227–232.
Fox R H, Myers R J K and Vallis I 1990 The nitrogen mineralization rate of legume residues in soil as influenced by their polyphenol, lignin, and nitrogen contents. Plant and Soil 129, 251–259.
Hagvar S and Kjondal B R 1981 Succession, diversity and feeding habits of microarthropods in decomposing birch leaves. Pedobiologia 22, 385–408.
Handayanto E, Cadisch G and Giller K E 1994 Nitrogen release from prunings of legume hedgerow trees in relation to quality of the prunings and incubation method. Plant and Soil 160, 237–248.
Herman W A, McGill W B and Dormarr J F 1977 Effects of initial chemical composition on decomposition of roots of three grass species. Can. J. Soil. Sci. 57, 205–215.
Howard P J A and Howard D M 1974 Microbial decomposition of tree and tree and shrub leaf litter. 1. Weight loss and chemical composition of decomposing litter. Oikos 25, 341–352.
Hunt 1977 A simulation model for decomposition in grasslands. Ecology 58, 469–484.
Jackson M L 1958 Soil Chemical Analysis. Prentice- Hall, Englewood, New Jersey, UK.
Jensen V 1974 Decomposition of angiosperm tree leaf litter. In Biology of Plant Decomposition, Vol. 1 Eds. C H Dickinson and G J F Pugh, pp 69–104. Academic Press, New York, USA.
Kang B T and Duguma B 1985 Nitrogen movement in alley cropping systems. In Nitrogen in Farming Systems in the Humid and the Sub-humid Tropics. Eds. B T Kang and Jvan den Heide. pp 269–284. Institute of Soil Fertility, Haren, The Netherlands.
Kang B T, Reynolds L and Atta-Krah A N 1990 Alley farming. Adv. Agron. 43, 315–359.
Kibe J M, Ochung H and Macharia D N 1981 Soils and Vegetation of the of the ICRAF Experimental Farm, Machakos District. Detailed Soil Survey No. D23, Kenya Soil Survey, Nairobi, Kenya.
King H G C and Heath G W 1967 The chemical analysis of small samples of leaf material and the relationship between the disappearance and composition of leaves. Pedobiologia 7, 192–197.
Lousier J D and Parkinson D 1976 Litter decomposition in a cool temperate deciduous forest. Can. J. Bot. 54, 419–436.
Melillo J M, Aber J D and Muratore J F 1982 Nitrogen and lignin control of hardwood leaf litter decomposition dynamics. Ecology 63, 621–626.
Oglesby K A and Fownes J H 1992 Effects of chemical composition on nitrogen mineralization from green manures of seven tropical leguminous trees. Plant and Soil 143, 127–132.
Olson R K and Reiners W A 1983 Nitrification in a subalpine balsam fir soils: tests for inhibitory factors. Soil Biol. Biochem. 15, 413–418
Palm C A and Sanchez P A 1991 Nitrogen release from the leaves of some tropical legumes as affected by their lignin and polyphenolic contents. Soil Biol. Biochem. 23, 83–88.
Parker D T 1962 Decomposition in the field of buried and surface-applied corn stalk residue. Soil Sci. Soc. Am. J. 26, 559–562.
Parr J F and Papendick R I 1978 Factors affecting the decomposition of crop residues by microorganisms. In Crop Residue Management Systems. Ed. W R Oschwald. pp 101–129. American Society of Agronomy, Madison, WI, USA.
Read M D, Kang B T and Wilson G F 1985 Use of Leucaena leucocephala (Lam.de Wit) leaves as nitrogen source for crop production. Fert. Res. 8, 107–116.
SAS 1992 Statistical Analysis System for Linear Models. Third edition. SAS Institute, NC, USA.
Santo V D, Berg B, Rutigliano F A, Alfani A and Fioretto A 1993 Factors regulating early-stage decomposition of needle litters in five different coniferous forests. Soil Biol. Biochem. 25, 1423–1433.
Seastedt T R 1984 The role of microarthropods in decomposition and mineralization process. Annu. Rev. Entomol. 29, 25–46.
St John T V 1980 Influence of litter bags on growth of fungal vegetative structures. Oecologia 46, 130–132.
Stevenson F J 1986 Cycles of soil carbon, nitrogen, phosphorus, sulfur, micronutrients. John Wiley and Sons, New York, USA.
TSBF 1993 Tropical Soil Biology and Fertility: A Handbook of Methods. Second ed. Eds. J M Anderson and J S I Ingram. CAB, Wallingford, UK.
Vallis I and Jones R J 1973 Net mineralization of nitrogen in leaves and leaf litter of Desmodium intortum and Phaseolus artopurpureus mixed with soil. Soil Biol. Biochem. 5, 391–398.
Van Soest P J 1968 Determination of lignin and cellulose in acid-detergent fiber with permanganate. J. Assoc. Off. Agric. Chem. 51, 780–785.
Wagger M G 1989 Time of dessication effects on plant composition and subsequent nitrogen release from several winter annual cover crops. Agron. J. 81, 236–241.
Weeraratna C S 1979 Pattern of nitrogen release during decomposition of some green manures in a tropical alluvial soil. Plant and Soil 53, 287–294.
Wieder R K and Lang G E 1982 A critique of the analytical methods used in examining decomposition data obtained from litter bags. Ecology 63, 1636–1642.
Yamoah C F, Agboola A A and Mulongoy K 1986 Decomposition, nitrogen release and weed control by pruning of selected alley cropping shrubs. Agrofor. Syst 4, 239–246.
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Jama, B.A., Nair, P.K.R. Decomposition- and nitrogen-mineralization patterns of Leucaena leucocephala and Cassia siamea mulch under tropical semiarid conditions in Kenya. Plant Soil 179, 275–285 (1996). https://doi.org/10.1007/BF00009338
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DOI: https://doi.org/10.1007/BF00009338