Site-specific nutrient management enhances sink size, a major yield constraint in rainfed lowland rice

A - Papers appearing in refereed journals

Banayo, N. P. M. C., Bueno, C. S., Haefele, S. M., Desamero, N. V. and Kato, Y. 2018. Site-specific nutrient management enhances sink size, a major yield constraint in rainfed lowland rice. Field Crops Research. 224 (1 July), pp. 76-79. https://doi.org/10.1016/j.fcr.2018.05.006

AuthorsBanayo, N. P. M. C., Bueno, C. S., Haefele, S. M., Desamero, N. V. and Kato, Y.
Abstract

Nutrient management can increase crop yield and income, but its effects on yield components are rarely dissected in on-farm research. In this study, we compared aboveground biomass and yield components of rainfed lowland rice under site-specific nutrient management and farmer management from 69 demonstration sites prone to mild to moderate intermittent drought across 9 Philippine provinces over 3 years (the 2011–2013 wet seasons). The sink size (spikelets m−2) was most closely associated with grain yield in all years. Panicle size (spikelets per panicle) increased by 10.4% and 13.0% in 2011 and 2012, respectively, under site-specific nutrient management, with N application around the early reproductive stage of <25 kg N ha−1 in farmer nutrient management versus 30–33 kg N ha−1 in site-specific management. Higher N application during seedling establishment in farmer nutrient management (55 kg N ha−1) than in site-specific management (22 kg N ha−1) did not increase panicles m−2 in any year. Our results demonstrate the yield advantage of site-specific nutrient management in rainfed lowland rice in relatively fertile and less drought-prone environments: enhancing sink size should be the major target of nutrient management; it is unnecessary to apply high amounts of N during seedling establishment to secure a sufficient panicle number; and N application is most important during the early reproductive stage to increase panicle size.

Year of Publication2018
JournalField Crops Research
Journal citation224 (1 July), pp. 76-79
Digital Object Identifier (DOI)https://doi.org/10.1016/j.fcr.2018.05.006
Open accessPublished as non-open access
Output statusPublished
Publication dates
Online24 May 2018
Publication process dates
Accepted07 May 2018
ISSN0378-4290
PublisherElsevier Science Bv

Permalink - https://repository.rothamsted.ac.uk/item/95xzq/site-specific-nutrient-management-enhances-sink-size-a-major-yield-constraint-in-rainfed-lowland-rice

Restricted files

Publisher's version

Under embargo indefinitely

34 total views
0 total downloads
2 views this month
0 downloads this month