Abstract
In calcareous soil, the significant portion of applied phosphorus (P) fertilizers is adsorbed on the calcite surface and becomes unavailable to plants. Addition of organic amendments with chemical fertilizers can be helpful in releasing the absorbed nutrients from these surfaces. To check out this problem, a field experiment was conducted for two years to determine the effect of P fertilizers and humic acid (HA) in enhancing P availability in soil and their ultimate effect on growth, yield and P uptake of wheat in calcareous soils. The experiment was comprised of five levels of P (0, 45, 67.5, 90 and 112.5 kg P2O5 ha−1) as a single superphosphate (SSP) and 2 levels of locally produced humic acid (with and without HA) arranged in a two factorial randomized complete block design (RCBD) with three replications. Wheat plant height, spike length, number of grains per spike, 1000-grain weight, grain, straw and biological yield were significantly improved by the addition of HA with SSP. Very often, the performance of 67.5 kg P2O5 ha−1 with HA were either similar or better than 90 or even 112.5 kg P2O5 ha−1 applied without HA. Post-harvest soil organic matter, AB-DTPA extractable and water-soluble P, plant P concentration and its uptake were also significantly improved by the addition of HA with SSP compared to sole SSP application. It was evident that P efficiency could be increased with HA addition and it has the potential to improve crop yield and plants P uptake in calcareous soils.
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Claims 7
Claim · model-written summary
Humic acid with SSP significantly improved wheat plant height, spike length, and grains per spike.
- Taxon
- Wheat
Triticum aestivume0 - Treatment
- addition of HA with SSPe0
- Outcome
- plant height, spike length, number of grains per spikee0
- Direction
- improvede0
- Comparator
- sole SSP applicatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat plant height, spike length, number of grains per spike, 1000-grain weight, grain, straw and biological yield were significantly improved by the addition of HA with SSP”
e1“compared to sole SSP application”
Claim · model-written summary
Humic acid with SSP significantly improved wheat 1000-grain weight and grain, straw, and biological yields.
- Taxon
- WheatTriticum aestivume0
- Treatment
- addition of HA with SSPe0
- Outcome
- 1000-grain weight, grain, straw and biological yielde0
- Direction
- improvede0
- Comparator
- sole SSP applicatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat plant height, spike length, number of grains per spike, 1000-grain weight, grain, straw and biological yield were significantly improved by the addition of HA with SSP”
e1“compared to sole SSP application”
Claim · model-written summary
The 67.5 kg P2O5 ha−1 plus HA treatment often matched or exceeded 90 or 112.5 kg P2O5 ha−1 without HA.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- 67.5 kg P2O5 ha−1 with HAe0
- Outcome
- performancee0
- Direction
- either similar or bettere0
- Comparator
- 90 or even 112.5 kg P2O5 ha−1 applied without HAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“performance of 67.5 kg P2O5 ha−1 with HA were either similar or better than 90 or even 112.5 kg P2O5 ha−1 applied without HA”
t0“Wheat”
Claim · model-written summary
HA with SSP significantly improved postharvest soil organic matter over sole SSP.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- addition of HA with SSPe0
- Outcome
- Post-harvest soil organic mattere0
- Direction
- improvede0
- Comparator
- sole SSP applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Post-harvest soil organic matter, AB-DTPA extractable and water-soluble P, plant P concentration and its uptake were also significantly improved by the addition of HA with SSP compared to sole SSP application”
t0“Wheat”
Claim · model-written summary
HA with SSP significantly improved postharvest extractable and water-soluble soil phosphorus over sole SSP.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- addition of HA with SSPe0
- Outcome
- AB-DTPA extractable and water-soluble Pe0
- Direction
- improvede0
- Comparator
- sole SSP applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Post-harvest soil organic matter, AB-DTPA extractable and water-soluble P, plant P concentration and its uptake were also significantly improved by the addition of HA with SSP compared to sole SSP application”
t0“Wheat”
Claim · model-written summary
HA with SSP significantly improved wheat plant phosphorus concentration and uptake over sole SSP.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- addition of HA with SSPe0
- Outcome
- plant P concentration and its uptakee0
- Direction
- improvede0
- Comparator
- sole SSP applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Post-harvest soil organic matter, AB-DTPA extractable and water-soluble P, plant P concentration and its uptake were also significantly improved by the addition of HA with SSP compared to sole SSP application”
t0“Wheat”
Claim · model-written summary
The authors concluded that HA addition could increase phosphorus efficiency.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- P efficiency could be increased with HA additione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P efficiency could be increased with HA addition”
t0“Wheat”
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