Effect of nitrogen fertiliser rate and timing on grain quality parameters and protein composition of rice grown in south-eastern Australia

Rachael Wood, Jeanette L. Balindong, John Mawson, Daniel LE Waters, Christopher Blanchard, Brian W Dunn, Prakash Oli

Research output: Other contribution to conferenceAbstract

Abstract

Nitrogen fertiliser is an important crop management practice used to increase yield. Growers use the previous growing history of a paddock to determine the correct nitrogen (N) rate, as there is no appropriate soil N test for rice. In south-eastern Australia, the total N rate is often split into two applications to reduce the risk of sterility induced by cold temperatures and high N uptake. This strategy involves a basal N application applied pre-permanent water (PW) and the second application following panicle initiation (PI). While previous research demonstrates that split N application (Pre-PW and PI) affects crop yield, data investigating the impact on grain quality is relatively sparse. Using the medium-grain, semi-dwarf rice variety YRM70, we compared the effect of eight N treatments (Five N rates applied pre-PW and three split treatments with the same total N rate) on grain quality parameters and protein composition. These data revealed increasing the rate of N applied pre-PW significantly increased whole grain yield (WGY; the proportion of whole grain expressed as a percentage of harvested grain), however, splitting the same total N rate into two applications reduced WGY.
Original languageEnglish
Pages105
Number of pages1
Publication statusPublished - 12 Sep 2018
Event68th Australasian Grain Science Conference - Charles Sturt University, Wagga Wagga, Australia
Duration: 10 Sep 201813 Sep 2018
https://www.ausgrainscience.org.au/wp-content/uploads/Conference2018/Booklet-2018.pdf (Conference booklet)

Conference

Conference68th Australasian Grain Science Conference
Abbreviated titleGrain Science Transforming our Future
Country/TerritoryAustralia
CityWagga Wagga
Period10/09/1813/09/18
Internet address

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