02299nam a2200193Ia 4500999001700000003000400017005001700021008004100038082001800079100001500097245007900112260008800191502000800279520160400287700002701891856005701918942001201975952011801987  c27247d27247OSt20220305151206.0140128s9999    xx            000 0 und d  a634.9bSUH/LI  aSuhyb P G   aLitter production and decomposition studies in selected species of acacia   aVellanikkarabDepartment of Tree Physiology and Breeding, College of Forestryc2004  bMSc3 aAn experiment was conducted at College of Forestry, Kerala Agricultural University, Vellanikkara, Thrissur during the period from 1999-2001 to study the litter production, nutrient return, litter decomposition and nutrient release pattern of three species of acacia viz., Acacia mangium Wild., Acacia aulacocarpa A. Cunn. ex Benth. and Acacia crassicarpa A. Cunn. ex Benth.

	Litter fall of the three species followed a monomodal distribution pattern with a distinct peak in December for the three species. Nutrient return through different components of litter indicated that for the three species, leaf litter returned maximum quantity of all nutrients. The three species returned maximum amount of nitrogen when compared to potassium and phosphorus. A characteristic biphasic pattern of biomass decomposition was observed with a rapid initial phase followed by slow latter phase. Negative linear relationship between lignin concentration and rate of mass loss was evident for the three species in two study situations. Only a poor correlation between weather parameters and rate of decomposition was observed. Fluctuation in the nitrogen and phosphorous  concentration of residual mass of the three species under different study situation was evident during the course of study. Potassium concentration for different species under various study situations was found to decline drastically during different months. The nitrogen, phosphorous and potassium mineralisation pattern of the three species of acacia under two study situations showed a best fit with the second order hyperbolic function.
  aVidyasagaran K (Guide)  uhttps://krishikosh.egranth.ac.in/handle/1/5810048226  2ddccTH  00102ddc4070aKAUCLVbKAUCLVcTHESESd2014-03-18l0o634.9 SUH/LIp172306r2014-03-18 00:00:00w2014-03-18yTH