ORCID Profile
0000-0001-7777-9401
Current Organisation
University of Queensland - Gatton Campus
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Publisher: Wiley
Date: 09-2016
Publisher: Scientific Research Publishing, Inc.
Date: 2015
Publisher: Wiley
Date: 2017
Publisher: Wiley
Date: 09-02-2023
DOI: 10.1002/AGJ2.21199
Abstract: In the Riverina, NSW, Australia, abundant poultry litter (PL) could offer an alternative P nutrition source for irrigated cotton ( Gossypium hirsutum L.). We assessed soil P availability, sequentially extracted P fractions, crop P uptake, and cotton yields using PL applications compared with mono‐ammonium phosphate (MAP) fertilizer in an alkaline Vertosol during the 2020–2021 season. Treatments were control, 150 kg MAP ha –1 , 150 kg MAP ha –1 plus 4 Mg PL ha –1 , and 4, 10, and 15 Mg PL ha –1 . Crop P uptake (22–38 kg ha –1 ) at defoliation, seed P export (14–20 kg ha –1 ), P use efficiency (5.1–6.6 kg seed‐P Mg –1 lint), and lint yield (2,654–3,118 kg ha –1 ) were not different across treatments. Apparent recovery of P treatments was low ( %). Across treatments, soil Colwell‐P (0.5 M NaHCO 3 ) were invariably high (23–70 mg kg –1 ) during crop‐growing season and did not differ from planting to first‐flower. Residual inorganic‐P (conc‐HCl‐Pi + H 2 SO 4 ‐H 2 O 2 ‐Pi) declined by 12% with concurrent increases in labile NaHCO 3 ‐Pi (4%) and organic‐P (dil‐HCl‐Po [4%] and conc‐HCl‐Po [3%]) over 18‐mo (from pre‐trial baseline s ling to defoliation) across treatments. At defoliation, the 15 Mg PL ha –1 treatment had lower soil pH and exchangeable sodium percentage and higher soil total C, moderately‐labile soil organic‐P (dil‐HCl‐Po), Colwell‐P, and extractable K than the control, MAP, or 4 Mg PL ha –1 treatments. Although P applications may not improve lint productivity because of inherent soil P release within a single cropping‐season, PL (15 Mg ha –1 ) may fully substitute for commercial MAP fertilizer for soil P maintenance and improving soil conditions in surface‐irrigated high‐yielding cotton in southeastern Australia.
Publisher: Wiley
Date: 07-2018
Publisher: Informa UK Limited
Date: 21-01-2016
Publisher: Wiley
Date: 11-2018
Publisher: Elsevier BV
Date: 11-2013
Publisher: Informa UK Limited
Date: 18-07-2015
Publisher: Wiley
Date: 07-2013
Publisher: Frontiers Media SA
Date: 15-08-2017
Publisher: Wiley
Date: 2016
Publisher: Wiley
Date: 09-2015
No related grants have been discovered for Rakesh Awale.