Structural characteristic, litterfall production and decomposition rate in home garden agroforestry system in Amphoe Muang, Changwat Nonthaburi
1994
Prapan Sampanpanish
Study on "Structural Characteristics, Litterfall Production and Its Decomposition Rate in Homegarden Agroforestry Sytem" was carried out in Amphoe Muang, Nonthaburi Province from December 1992 to November 1993. It emphasized three aspects. Firstly, Structural characteristic of the plant community was analysed quantitatively, i.e. number of species, number of trees, height, DBH, crown cover, horizontal and vertical distribution of tree stand. Secondly, litterfall production was monthly collected from litter traps, then sekparated into leaf, branch and others for chemical analysis. Thirdly, decomposition rate of litter was studied by using twelve bags containing; equal amounts of dry litter, laid on ground surface in the sample plot. By the end of every month, each bag was randomly collected to determine the change in weight of the litter. In addition, soil samples were also collected to analyse fertility. The area of studied homegarden was about 4.31 rai (0.69 ha). The plant community consisted mainly of fruit trees with the density of 6,877 trees/hectare, totally 58 species. The trees were ranging from 10.51-15.5 cm, in DBH and 7.00-13.50 m in height. The continuous canopy was divided into four layers in terms of ecological aspect, Durio zibethinus and Erythrina subumbrans were dominant with I.V.I. about 56 and 53 percent respectively, followed by Areca catechu, Cocos nudiflora, Eugenia malaccensis and so on. The Shannon-Wiener index was 4.0 as nearly as some mixed deciduous and dry evergreen forests. The annual litterfall production was about 5.682 ton/hectare/year which could be converted to amount of Ca, N, K, Mg, and P return to the soils about 106.883, 81.923, 75.083, 26.324 and 8.042 kg/ha/year. The decomposition rate of litter was about 2.036 ton/hectare/year.
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Эту запись предоставил Kasetsart University