Planting Time Options as Alternative to the Katam Terpadu at Muara Experimental Site in Bogor
Elsa Rakhmi Dewi
Indonesian Agroclimate and Hydrology Research Institute (IAHRI), Indonesia
The information system of KATAM Terpadu (Integrated Cropping Calendar) has been broadly applied in many fields in Indonesia to cope with climate change and maintain the stability of agricultural production. However, the information system allows limited options of planting time of one growing season. We used crop simulation model APSIM-ORYZA to evaluate scenarios of favourable planting time to improve productivity at Muara experimental site in Bogor. Options evaluated considered the early and late planting times in accordance with KATAM Terpadu. Yield was used as indicator of productivity. APSIM-ORYZA simulated yield with a significant accuracy (EF=0.74) across the different planting times following the growing season. For the irrigation system, the late planting resulted similar yield to the KATAM recommendation (5.1-5.8 ton ha-1), whereas the early planting resulted the lowest yield (3-5 ton ha-1). For the rainfed system, the early planting presented the same yield as the KATAM planting in the rainy season (2.9-3.2 ton ha-1) and the dry season (4.0-4.3 ton ha-1), respectively. This study confirmed that simulation model is a useful tool in determination of planting time and that planting time based on prevailing climate conditions will ensure the acceptable yield in rice cropping systems.
Keywords: Climate change, crop simulation model, planting time
Contact Address: Elsa Rakhmi Dewi, Indonesian Agroclimate and Hydrology Research Institute (IAHRI), Bogor, Indonesia, e-mail: elsarakhmigmail.com