Abstract
In calcareous soils, phosphorus (P) availability to plant is impaired due to the formation of insoluble complexes with calcium and magnesium. Therefore, this study was executed to compare the P use efficiency (PUE) of four different P sources [rock phosphate (RP), acidulated rock phosphate (ARP), single super phosphate (SSP) and di ammonium phosphate (DAP)] alone or pre-treated with organic amendments (farm yard manure (FYM) enriched compost, simple compost and humic acid (HA)) along with control in maize crop under calcareous soils. All treatments irrespective of P sources received 90 kg P 2 O 5 ha −1 . Phosphorus application regardless of its sources and combination with organic amendments significantly improved maize growth, yield as well as P uptake and PUE. Rock phosphate when applied alone was recorded inferior but its performance significantly improved with compost or its pre-addition with FYM and HA, that further enhanced upon acidulation. Maize grain yield increased by 21, 22.2, 67.9 and 94% with RP, ARP, ARP enriched compost and ARP+ compost respectively, over control. Similarly, PUE of DAP improved from 31.7 to 43.1 and 39 with sample and enriched compost correspondingly. Post-harvest soil and grain P were at par for SSP, ARP and DAP alone or in conjugation with organic amendments when averaged across the amendments. These results suggested that pretreatment of P sources with organic amendments is an economical and more feasible approach to improve maize yield and PUE. Moreover, on-farm acidulation of RP may give at par results with SSP and DAP with cheaper rate and hence recommended for P management in maize in alkaline calcareous soils.
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Claims 10
Claim · model-written summary
Phosphorus application improved maize growth, yield, P uptake and PUE.
- Treatment
- Phosphorus applicatione0
- Outcome
- maize growth, yield as well as P uptake and PUEe0
- Direction
- improvede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus application regardless of its sources and combination with organic amendments significantly improved maize growth, yield as well as P uptake and PUE”
Claim · model-written summary
Rock phosphate alone performed worse, but compost, FYM and HA pretreatment and acidulation improved it.
- Treatment
- composte0
- Outcome
- performancee0
- Direction
- improvede0
- Comparator
- Rock phosphate when applied alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e0“Rock phosphate when applied alone was recorded inferior but its performance significantly improved with compost or its pre-addition with FYM and HA, that further enhanced upon acidulation”
Claim · model-written summary
Maize grain yield increased 21 with RP.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize grain yield increased by 21, 22.2, 67.9 and 94% with RP, ARP, ARP enriched compost and ARP+ compost respectively, over control”
Claim · model-written summary
Maize grain yield increased 22.2 with ARP.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize grain yield increased by 21, 22.2, 67.9 and 94% with RP, ARP, ARP enriched compost and ARP+ compost respectively, over control”
Claim · model-written summary
Maize grain yield increased 67.9 with ARP enriched compost.
- Treatment
- ARP enriched composte0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 67.9e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize grain yield increased by 21, 22.2, 67.9 and 94% with RP, ARP, ARP enriched compost and ARP+ compost respectively, over control”
Claim · model-written summary
Maize grain yield increased 94% with ARP+ compost.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize grain yield increased by 21, 22.2, 67.9 and 94% with RP, ARP, ARP enriched compost and ARP+ compost respectively, over control”
Claim · model-written summary
Compost improved DAP phosphorus use efficiency from 31.7 to 43.1.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e0“PUE of DAP improved from 31.7 to 43.1 and 39 with sample and enriched compost correspondingly”
Claim · model-written summary
Enriched compost improved DAP phosphorus use efficiency from 31.7 to 39.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e0“PUE of DAP improved from 31.7 to 43.1 and 39 with sample and enriched compost correspondingly”
Claim · model-written summary
Postharvest soil and grain P were comparable for SSP, ARP and DAP across amendments.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e0“Post-harvest soil and grain P were at par for SSP, ARP and DAP alone or in conjugation with organic amendments when averaged across the amendments”
Claim · model-written summary
The authors recommend organic pretreatment of phosphorus sources and on-farm acidulation of rock phosphate for maize P management.
- Outcome
- P managemente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pretreatment of P sources with organic amendments is an economical and more feasible approach to improve maize yield and PUE”
e1“on-farm acidulation of RP may give at par results with SSP and DAP with cheaper rate and hence recommended for P management in maize in alkaline calcareous soils”
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