Effect of compost on grain yield and fertilizer use efficiency of rice in site-specific fertilizer management
Research Title : Effect of compost on grain yield and fertilizer use efficiency of rice in site-specific fertilizer management
Researcher : ผศ.อุไรวรรณ ไอยสุวรรณ์
Office : Silpakorn University
Research Grants : Research and Innovation for Transfer technology to Rural Community Project
Year : 2011
Abstract
The objective of this experiment was to study the effects of compost and site-specific fertilization (SSF) regimes on yield and yield components of Pathum Thani grown on Sappaya Soil Series. A complete randomized design with 6 replications was used. Treatments were different fertilization regimes, namely 1) no fertilizer (control; N), 2) 500kg/rai of compost (C500), 3) site-specific synthetic fertilizer (SSF), 4) 500kg/rai of compost + 0.5SSF (C500+0.5SSF), 5) 500 kg/rai of compost + SSF (C500+SSF) and 6) 500 kg/rai of compost + 2SSF (C500+2SSF). Plant height at 30 and 50 days after transplanting (DAT) were highest (p<0.05) in the C500+2SSF. At 50 DAT, tiller numbers of rice in all SSF regimes were not differ (p>0.05), but all were greater (p<0.05) than the C500 and control. Yield components, i.e. 100-grain weights, infertile percentages and grains per spike were not different (p>0.05) among C500+0.5SSF, C500+SSF and C500+2SSF regimes, but greater (p<0.05) than the others. Grain yields were not different (p>0.05) between the C500+2SSF (951 kg/rai) and the C500+SSF (922 kg/rai), but greater (p<0.05) than the others. Economic return over fertilizer costs in the SSF (8,275 Baht/rai) was greatest (p<0.05). In conclusion, it is recommended to grow rice using the SSF regime (4kg nitrogen/rai, 6kg P2O5/rai and 2kg K2O/rai).
Keywords: compost, sit-specific fertilization (SSF), yield, rice