A - Papers appearing in refereed journals
Banayo, N. P. M. C., Haefele, S. M., Desamero, N. V. and Kato, Y. 2017. On-farm assessment of site-specific nutrient management for rainfed lowland rice in the Philippines. Field Crops Research. 220, pp. 88-96.
|Authors||Banayo, N. P. M. C., Haefele, S. M., Desamero, N. V. and Kato, Y.|
Rice yield in the drought-prone rainfed lowlands is constrained by low availability of nutrients and water. Fertilizer applications currently conducted by farmers may not match the crop demands nor be resource-use efficient. The objective of this study was to characterize the farmers’ practices of nutrient management (FP) in rainfed lowland environments, and compare it with the site-specific nutrient management guideline by using decision-support software (Rice Crop Manager; RCM) in terms of rice yield and production cost. On-farm trials were conducted in northern Philippines in the wet seasons of 2011–2014. Average application rate of N, P and K in RCM was 82, 10 and 21kgha−1, respectively, while the application rate was 93, 11 and 18kgha−1 in FP (n=93). Grain yield in FP, which ranged from 1.82 to 6.49tha−1, was significantly enhanced by RCM by 6% on average (4.48 vs. 4.22tha−1). The yield difference was mainly associated with the different N application regimes in RCM and FP. Average number of N applications was 1.94 in FP with 52% of total N applied during the first 15days after transplanting while there were 2.63 applications in RCM with 29% applied during the first 15days after transplanting and 44% at panicle initiation, respectively. Total cost for fertilizer was comparable or lower in RCM than FP, and hence the net income was increased by 154 US$ ha−1. The results of this study showed that site-specific nutrient management improved productivity and profitability in rainfed lowlands of the Philippines.
|Year of Publication||2017|
|Journal||Field Crops Research|
|Journal citation||220, pp. 88-96|
|Digital Object Identifier (DOI)||doi:10.1016/j.fcr.2017.09.011|
|Open access||Published as non-open access|
|Online||14 Sep 2017|
|Publication process dates|
|Accepted||08 Sep 2017|
|Copyright license||Publisher copyright|
Permalink - https://repository.rothamsted.ac.uk/item/8v603/on-farm-assessment-of-site-specific-nutrient-management-for-rainfed-lowland-rice-in-the-philippines