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Combined application of nitrogen and phosphorus to enhance nitrogen use efficiency and close the wheat yield gap on varying soils in semi‐arid conditions

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Relation http://oar.icrisat.org/11450/
https://doi.org/10.1111/jac.12357
doi:10.1111/jac.12357
 
Title Combined application of nitrogen and phosphorus to enhance nitrogen use efficiency and close the wheat yield gap on varying soils in semi‐arid conditions
 
Creator McBeath, T M
Gupta, V V S R
Llewellyn, R S
Mason, S D
Davoren, C W
Correll, R L
Jones, B
Whitbread, A M
 
Subject Semi-Arid Tropics
Food and Nutrition
Wheat
Fertilizer Applications
 
Description A primary driver of the wheat yield gap in Australia and globally is the supply of nitrogen (N) and options to increase N use efficiency (NUE) are fundamental to closure of the yield gap. Co‐application of N with phosphorus (P) is suggested as an avenue to increase fertiliser NUE, and inputs of N and P fertiliser are key variable costs in low rainfall cereal crops. Within field variability in the response to nutrients due to soil and season offers a further opportunity to refine inputs for increased efficiency. The response of wheat to N fertiliser input (0, 10, 20, 40 and 80 kg N ha‐1) under four levels of P fertiliser (0, 5, 10 and 20 kg P ha−1) was measured on three key low rainfall cropping soils (dune, mid‐slope and swale) across a dune‐swale system in a low rainfall semi‐arid environment in South Australia, for three successive cropping seasons. Wheat on sandy soils produced significant and linear yield and protein responses across all three seasons, while wheat on a clay loam only produced a yield response in a high rainfall season. Responses to P fertiliser were measured on the sandy soils but more variable in nature and a consistent effect of increased P nutrition leading to increased NUE was not measured.
 
Publisher Wiley
 
Date 2019-11
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11450/1/McBeath_etal_N%26P_NUE_Mallee_J_Agron%26CropSc_2019.pdf
McBeath, T M and Gupta, V V S R and Llewellyn, R S and Mason, S D and Davoren, C W and Correll, R L and Jones, B and Whitbread, A M (2019) Combined application of nitrogen and phosphorus to enhance nitrogen use efficiency and close the wheat yield gap on varying soils in semi‐arid conditions. Journal of Agronomy and Crop Science (TSI), 205 (6). pp. 635-646. ISSN 0931-2250