Abstract
A field experiment was conducted in an Inceptisol (IARI, New Delhi, India) during 2010–2011 and 2011–2012 to investigate the effect of optimal (100% NPK) to super-optimal doses (200% NPK) of mineral fertilizer on yield attributes, nutrient harvest index and their uptake pattern in wheat (Triticum aestivum) crop under a maize-wheat cropping systems. Ten levels of fertilizer N, P and K along with 3% foliar spray of iron were laid out in a randomized manner in three replications. Proportionate increase in fertilizer doses of NPK increases the wheat grain (+5.4–5.6%) and straw yield (+5.1–6.1%), but the rate of increase in yield declines as we move from lower to higher doses. The change or increased yield under treatments representing higher doses of NPK is attributed to the increase number of spikes (+4.7–56%) and the weight of grains in each spike (+5–6%). Super-optimal dose of mineral fertilizers (200% NPK) application increased the nutrient contents and uptake of nutrients in grain and straw of wheat. Fertility status of soil after the harvest of two cycles of maize-wheat crop increased with increased application of N, P and K. Nutrient harvest indices for various nutrients showed the effectiveness of mineral fertilizers and foliar iron application increased iron harvest index+9–20%.
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Claims 8
Claim · model-written summary
Proportionate increases in NPK fertilizer doses increased wheat grain yield by 5.4-5.6%.
- Taxon
- wheat
Triticum aestivume1 - Treatment
- Proportionate increase in fertilizer doses of NPKe1
- Outcome
- wheat graine1
- Direction
- increasese1
- Value
- +5.4–5.6%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Proportionate increase in fertilizer doses of NPK increases the wheat grain (+5.4–5.6%) and straw yield (+5.1–6.1%)”
Claim · model-written summary
Proportionate increases in NPK fertilizer doses increased wheat straw yield by 5.1-6.1%.
- Taxon
- wheatTriticum aestivume1
- Treatment
- Proportionate increase in fertilizer doses of NPKe1
- Outcome
- straw yielde1
- Direction
- increasese1
- Value
- +5.1–6.1%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Proportionate increase in fertilizer doses of NPK increases the wheat grain (+5.4–5.6%) and straw yield (+5.1–6.1%)”
Claim · model-written summary
The rate of increase in wheat yield declined from lower to higher NPK doses.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- rate of increase in yielde1
- Direction
- declinese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Crop”
e1“the rate of increase in yield declines as we move from lower to higher doses”
Claim · model-written summary
Higher NPK doses increased the number of spikes by 4.7-56%.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- number of spikese1
- Direction
- increasee1
- Value
- +4.7–56%e1
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Crop”
e1“increase number of spikes (+4.7–56%)”
Claim · model-written summary
Higher NPK doses increased the weight of grains in each spike by 5-6%.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- weight of grains in each spikee1
- Direction
- increaseinferrede1
- Value
- +5–6%e1
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Crop”
e1“the weight of grains in each spike (+5–6%)”
Claim · model-written summary
The super-optimal dose of mineral fertilizers (200% NPK) increased nutrient contents and nutrient uptake in wheat grain and straw.
- Taxon
- wheatTriticum aestivume1
- Organ / stage
- grain and strawe1
- Treatment
- Super-optimal dose of mineral fertilizers (200% NPK)e1
- Outcome
- nutrient contents and uptake of nutrientse1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Super-optimal dose of mineral fertilizers (200% NPK) application increased the nutrient contents and uptake of nutrients in grain and straw of wheat”
Claim · model-written summary
Soil fertility status after two cycles of maize-wheat cropping increased with increased N, P and K application.
- Taxon
- wheatTriticum aestivume1
- Treatment
- increased application of N, P and Ke1
- Outcome
- Fertility status of soile1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Fertility status of soil after the harvest of two cycles of maize-wheat crop increased with increased application of N, P and K”
Claim · model-written summary
Foliar iron application increased the iron harvest index by 9-20%.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- foliar iron applicatione1
- Outcome
- iron harvest indexe1
- Direction
- increasede1
- Value
- +9–20%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Crop”
e1“foliar iron application increased iron harvest index+9–20%”
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