Utilization of madre de cacao and ipil-ipil leaves as organic fertilizers for field corn production
1995
Doloso, F.G. (La Granja National Crop Research and Development Center, La Carlota City, Negros Occidental (Philippines))
A two-year study was undertaken at the experimental area of the La Granja National Crop Research and Development Center, La Carlota City, Negros Occidental [Philippines] attempting to look for alternative and economical sources of fertilizer for corn. The experiment was laid out in a randomized complete block design in four replications. The treatments consisted of air-dried leaves of madre de cacao and ipil-ipil as organic fertilizers combined with inorganic fertilizer in different quantities namely: T1- 3 tons ipil-ipil leaves/ha, T2- 4.5 tons ipil-ipil leaves/ha, T3- 6 tons ipil-ipil leaves/ha, T4- 3 tons ipil-ipil leaves/ha + 30-15-15 kg NPK/ha, T5- 4.5 tons of ipil-ipil leaves/ha + 30-15-15 kg NPK/ha, T6- 6 tons of ipil-ipil leaves/ha + 30-15-15 NPK/ha, T7- 3 tons madre de cacao leaves/ha, T8- 4.5 tons madre de cacao leaves/ha, T9- 6 tons madre de cacao leaves/ha, T10- 3 tons madre de cacao leaves/ha + 30-15-15 NPK/ha, T11- 4.5 tons madre de cacao leaves/ha + 30-15-15 kg NPK/ha, T12- 6 tons madre de cacao leaves/ha + 30-15-15 kg NPK/ha, T13- recommended rate (60-30-30 kg NPK/ha) and T14- control (no fertilizer). Significant results were obtained on grain yield and plant height of corn. Application of 3 to 6 tons ipil-ipil or madre de cacao leaves plus inorganic fertilizer at the rate of 30-15-15 kg NPK/ha gave significantly higher yield comparable with the application of the recommended rate (60-30-30 kg NPK/ha) of inorganic fertilizer during the wet season. The dry season of performance of corn showed that comparable yield was obtained in the application of 4.5 to 6 tons ipil-ipil leaves + 30-15-15 kg NPK/ha of inorganic fertilizer, 4.5 to 6 tons of madre de cacao leaves alone or 3 to 6 tons madre de cacao + 30-15-15 kg NPK/ha of inorganic fertilizer, and the recommended rate of 60-30-30 kg NPK/ha of inorganic fertilizers. Highest Marginal Rate of Return (MRR) of 481.40 and 481.31 percent during the wet and dry seasons, respectively were obtained from the application of 3 tons madre de cacao leaves/ha
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