Abstract
ABSTRACT Humic acid (HA), as a bio-stimulant and a major component of organic matter (OM), can improve plant physiology, soil fertility, and nutrient availability, mainly in low OM soils. Nitrogen (N) is one of the most important nutrients that affect several metabolic and biochemical activities, leading to improved plant development. This study was conducted to investigate the combined effect of HA and N doses on soil organic matter (SOM) and total N concentration, N uptake, corn growth, and grain yield under conventional tillage at Peshawar, Pakistan. Treatments were tested in a randomized block design with four replicates arranged in a factorial scheme 3 × 4 + 1. The respective doses of HA (1.5, 3,0 and 4.5 kg ha-1) were applied at the corn sowing, whereas N doses (80, 120, 160, and 200 kg ha-1) were applied in three splits (1/3 at sowing, 1/3 at the V5 stage, and remaining 1/3 at the tasselling stage) with one control (no HA and N). The application of HA, regardless of the applied doses, had positive effects on SOM, N concentration, N uptake, corn development, and grain yield. However, the application of 4.5 kg ha-1 of HA was the most effective in promoting SOM (0.83%) and total N (0.31%), shoot biomass (10610 kg ha-1), N uptake (1.13%), and grain yield (3780 kg ha-1), even when combined with the N doses of 80, 120 and 160 kg N ha-1. Increasing N doses positively influenced SOM, N concentration, N uptake, and corn growth. The greatest grain yield was obtained at 150 kg ha-1 of N regardless of HA applied doses.
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Claims 10
Claim · model-written summary
Humic acid application had positive effects on soil organic matter, N concentration and N uptake of corn compared with the control without HA and N.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- The application of HAe1
- Outcome
- SOM, N concentration, N uptakee1
- Direction
- positive effectse1
- Comparator
- control (no HA and N)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in corn crop”
e1“The application of HA, regardless of the applied doses, had positive effects on SOM, N concentration, N uptake, corn development, and grain yield”
e2“with one control (no HA and N)”
Claim · model-written summary
Humic acid application had positive effects on corn development and grain yield compared with the control without HA and N.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- The application of HAe1
- Outcome
- corn development, and grain yielde1
- Direction
- positive effectse1
- Comparator
- control (no HA and N)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in corn crop”
e1“The application of HA, regardless of the applied doses, had positive effects on SOM, N concentration, N uptake, corn development, and grain yield”
e2“with one control (no HA and N)”
Claim · model-written summary
Increasing N doses positively influenced soil organic matter, N concentration and N uptake of corn.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- Increasing N dosese3
- Outcome
- SOM, N concentration, N uptakee3
- Direction
- positively influencede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in corn crop”
e3“Increasing N doses positively influenced SOM, N concentration, N uptake, and corn growth”
Claim · model-written summary
Increasing N doses positively influenced corn growth.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- Increasing N dosese3
- Outcome
- corn growthe3
- Direction
- positively influencede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in corn crop”
e3“Increasing N doses positively influenced SOM, N concentration, N uptake, and corn growth”
Claim · model-written summary
4.5 kg ha-1 of HA was the most effective dose for promoting soil organic matter, reaching 0.83%.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- the application of 4.5 kg ha-1 of HAe4
- Outcome
- SOMe4
- Direction
- promotinge4
- Value
- 0.83%e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in corn crop”
e4“the application of 4.5 kg ha-1 of HA was the most effective in promoting SOM (0.83%) and total N (0.31%), shoot biomass (10610 kg ha-1), N uptake (1.13%), and grain yield (3780 kg ha-1)”
Claim · model-written summary
4.5 kg ha-1 of HA was the most effective dose for promoting total N, reaching 0.31%.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- the application of 4.5 kg ha-1 of HAe4
- Outcome
- total Ne4
- Direction
- promotinge4
- Value
- 0.31%e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in corn crop”
e4“the application of 4.5 kg ha-1 of HA was the most effective in promoting SOM (0.83%) and total N (0.31%), shoot biomass (10610 kg ha-1), N uptake (1.13%), and grain yield (3780 kg ha-1)”
Claim · model-written summary
With 4.5 kg ha-1 of HA, corn shoot biomass was 10610 kg ha-1.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- the application of 4.5 kg ha-1 of HAe4
- Outcome
- shoot biomasse4
- Direction
- increaseinferrede4
- Value
- 10610 kg ha-1e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in corn crop”
e4“the application of 4.5 kg ha-1 of HA was the most effective in promoting SOM (0.83%) and total N (0.31%), shoot biomass (10610 kg ha-1), N uptake (1.13%), and grain yield (3780 kg ha-1)”
Claim · model-written summary
With 4.5 kg ha-1 of HA, corn N uptake was 1.13%.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- the application of 4.5 kg ha-1 of HAe4
- Outcome
- N uptakee4
- Direction
- increaseinferrede4
- Value
- 1.13%e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in corn crop”
e4“the application of 4.5 kg ha-1 of HA was the most effective in promoting SOM (0.83%) and total N (0.31%), shoot biomass (10610 kg ha-1), N uptake (1.13%), and grain yield (3780 kg ha-1)”
Claim · model-written summary
With 4.5 kg ha-1 of HA, corn grain yield was 3780 kg ha-1.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- the application of 4.5 kg ha-1 of HAe4
- Outcome
- grain yielde4
- Direction
- increaseinferrede4
- Value
- 3780 kg ha-1e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in corn crop”
e4“the application of 4.5 kg ha-1 of HA was the most effective in promoting SOM (0.83%) and total N (0.31%), shoot biomass (10610 kg ha-1), N uptake (1.13%), and grain yield (3780 kg ha-1)”
Claim · model-written summary
The greatest corn grain yield was obtained at 150 kg ha-1 of N regardless of HA dose.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- 150 kg ha-1 of Ne5
- Outcome
- grain yielde5
- Direction
- greateste5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in corn crop”
e5“The greatest grain yield was obtained at 150 kg ha-1 of N regardless of HA applied doses”
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