Generation of Trichoderma-activated compost fertilizer: its decomposition and fertilizer efficiency on coconut seedlings
1992
Ebuna, R.M.
Results of the incubation study showed that inoculation of Trichoderma harzianum at a rate of 2% lead to a decrease on the organic C and increase total N content of the organic substrates. N mineralization was highly favored in garbage/swine manure, garbage, and sunflower substrates with 246.88, 224.82 and 202.82 ppm N, respectively. Decomposition studies showed that garbage/swine manure (4.2) riped at 4 weeks with analysis grade of 2.08% N-8.38% P2D5-1.77% K2O; cogon grass/hagonoy/cow manure (3:2:1) riped at 6 weeks with analysis grade of 0.88% N-6.07 P2O5-1.04% K2O while husk/sunflower/chicken dung (3:2:1) was partially riped at 16 weeks with analysis grade of 1.21% N-18.20% P2O5-1.13% K2O. Trichoderma failed to fully decompose the husks due to its high lignin contents. Efficacy test showed that garbage/swine manure gave significantly high records on coconut seedlings' height, girth, leaf count and dry matter yield accumulation. Application of 608 g/seedling of garbage/swine manure compost attained the highest N uptake at 15.67 g-N per pot. N fertilizer efficiency was highest in 75% garbage/swine manure-25% ammonium sulfate combinations resulting to 107.78% FE. An application of 75% G/SM-25% AS, 100% C/HY/CM, and 75% H/SF/CD-25% AS adjusted at a rate of 12.6 g-N per seedling may be considered satisfactory for coconut seedling planted on Tugbok clay loam
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