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
Increasing NPK doses increased wheat grain yield by 5.4-5.6%.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- fertilizer doses of NPKe0
- Outcome
- wheat graine0
- Direction
- increasese0
- Value
- 5.4-5.6%e0
- Comparator
- optimal (100% NPK)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Proportionate increase in fertilizer doses of NPK increases the wheat grain (+5.4-5.6%)”
e1“optimal (100% NPK) to super-optimal doses (200% NPK)”
Claim · model-written summary
Increasing NPK doses increased wheat straw yield by 5.1- 6.1%.
- Taxon
- wheatTriticum aestivume0
- Treatment
- fertilizer doses of NPKe0
- Outcome
- straw yielde0
- Direction
- increasese0
- Value
- 5.1- 6.1%e0
- Comparator
- optimal (100% NPK)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Proportionate increase in fertilizer doses of NPK increases the wheat grain (+5.4-5.6%) and straw yield (+5.1- 6.1%)”
e1“optimal (100% NPK) to super-optimal doses (200% NPK)”
Claim · model-written summary
The rate of wheat yield increase declined at higher NPK doses.
- Taxon
- wheatTriticum aestivume1
- Treatment
- higher dosese0
- Outcome
- rate of increase in yielde0
- Direction
- declinese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the rate of increase in yield declines as we move from lower to higher doses”
e1“wheat (Triticum aestivum)”
Claim · model-written summary
Higher NPK doses increased the number of wheat spikes by 4.7-56%.
- Taxon
- wheatTriticum aestivume1
- Treatment
- higher doses of NPKe0
- Outcome
- number of spikese0
- Direction
- increasee0
- Value
- 4.7-56%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher doses of NPK is attributed to the increase number of spikes (+4.7-56%)”
e1“wheat (Triticum aestivum)”
Claim · model-written summary
Higher NPK doses increased grain weight per spike by 5-6%.
- Taxon
- wheatTriticum aestivume1
- Treatment
- higher doses of NPKe0
- Outcome
- weight of grains in each spikee0
- Direction
- increasee0
- Value
- 5-6%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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%)”
e1“wheat (Triticum aestivum)”
Claim · model-written summary
The 200% NPK dose increased nutrient contents and uptake in wheat grain and straw.
- Taxon
- wheatTriticum aestivume0
- Treatment
- 200% NPKe0
- Outcome
- nutrient contents and uptake of nutrients in grain and strawe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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 increased with greater NPK application after two maize-wheat cycles.
Verbatim
e0“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 increased the iron harvest index by 9-20%.
- Taxon
- wheatTriticum aestivume1
- Treatment
- foliar iron applicatione0
- Outcome
- iron harvest indexe0
- Direction
- increasede0
- Value
- 9-20%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar iron application increased iron harvest index+9-20%”
e1“wheat (Triticum aestivum)”
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