Abstract
Nitrogen (N) anticipation in cover crops, besides increasing the accumulation of dry weight and nutrients, may favor the subsequent crop by increasing the availability of N. However, N can alter the decomposition of phytomass, which could reduce the beneficial effects of cover crops. The objective of this study was to evaluate the decomposition rate and nutrients release from Pennisetum glaucum and Panicum maximum syn. Urochloa maxima as a function of N fertilization. A randomized blocks design with four replicates, constituted by four treatments (pearl millet with N, pearl millet without N, guinea grass with N and guinea grass without and six sampling times (0, 14, 34, 41, 51 and 68 days after management (DAM)). The pearl millet produces more shoot dry weight than guinea grass, and the N fertilization increases the amount of dry weight for both species, but does not alter the decomposition rate. Pearl millet accumulates and releases to the soil large amounts of nutrients followed by guinea grass, regardless of N fertilization. N fertilization increases the amount of N accumulated and accelerates the release of N into the soil. The maximum release rates occur in the period of 0–14 DAM, more intensely with the N fertilization for the N.
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Claims 11
Claim · model-written summary
Pearl millet produced more shoot dry weight than guinea grass.
- Taxon
- pearl millet
Cenchrus americanuse0 - Outcome
- shoot dry weighte0
- Direction
- moree0
- Comparator
- guinea grasse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The pearl millet produces more shoot dry weight than guinea grass”
Claim · model-written summary
Nitrogen fertilization increased pearl millet dry weight.
- Taxon
- pearl milletCenchrus americanuse1
- Treatment
- N fertilizatione0
- Outcome
- amount of dry weighte0
- Direction
- increasese0
- Comparator
- without Ne1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the N fertilization increases the amount of dry weight for both species”
e1“pearl millet without N”
Claim · model-written summary
Nitrogen fertilization increased guinea grass dry weight.
- Taxon
- guinea grass
.jpg?width=60)
Megathyrsus maximuse1 - Treatment
- N fertilizatione0
- Outcome
- amount of dry weighte0
- Direction
- increasese0
- Comparator
- withoute1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“the N fertilization increases the amount of dry weight for both species”
e1“guinea grass without”
Claim · model-written summary
Nitrogen fertilization did not alter pearl millet decomposition rate.
- Taxon
- pearl milletCenchrus americanuse1
- Treatment
- N fertilizatione0
- Outcome
- decomposition ratee0
- Direction
- does not altere0
- Comparator
- without Ne1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the N fertilization increases the amount of dry weight for both species, but does not alter the decomposition rate”
e1“pearl millet without N”
Claim · model-written summary
Nitrogen fertilization did not alter guinea grass decomposition rate.
- Taxon
- guinea grassMegathyrsus maximuse1
- Treatment
- N fertilizatione0
- Outcome
- decomposition ratee0
- Direction
- does not altere0
- Comparator
- withoute1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the N fertilization increases the amount of dry weight for both species, but does not alter the decomposition rate”
e1“guinea grass without”
Claim · model-written summary
Pearl millet accumulated and released large nutrient amounts to soil irrespective of nitrogen fertilization.
- Taxon
- Pearl milletCenchrus americanuse0
- Outcome
- amounts of nutrientse0
- Direction
- largee0
- Qualifier
- regardless of N fertilizatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pearl millet accumulates and releases to the soil large amounts of nutrients followed by guinea grass, regardless of N fertilization.”
Claim · model-written summary
Guinea grass accumulated and released nutrients to soil, less than pearl millet, irrespective of nitrogen fertilization.
- Taxon
- guinea grassMegathyrsus maximuse0
- Outcome
- amounts of nutrientse0
- Direction
- followed bye0
- Qualifier
- regardless of N fertilizatione0
- Comparator
- Pearl millete0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pearl millet accumulates and releases to the soil large amounts of nutrients followed by guinea grass, regardless of N fertilization.”
Claim · model-written summary
Nitrogen fertilization increased accumulated nitrogen amount.
- Taxon
- Pennisetum glaucum and Panicum maximum syn. Urochloa maximaCenchrus americanusMegathyrsus maximuse1
- Treatment
- N fertilizatione0
- Outcome
- amount of N accumulatede0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N fertilization increases the amount of N accumulated”
e1“Pennisetum glaucum and Panicum maximum syn. Urochloa maxima”
Claim · model-written summary
Nitrogen fertilization accelerated nitrogen release to soil.
- Taxon
- Pennisetum glaucum and Panicum maximum syn. Urochloa maximaCenchrus americanusMegathyrsus maximuse2
- Treatment
- N fertilizatione1
- Outcome
- release of N into the soile0
- Direction
- acceleratese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“accelerates the release of N into the soil”
e1“N fertilization increases the amount of N accumulated”
e2“Pennisetum glaucum and Panicum maximum syn. Urochloa maxima”
Claim · model-written summary
Maximum nutrient release rates occurred 0–14 days after management.
- Taxon
- Pennisetum glaucum and Panicum maximum syn. Urochloa maximaCenchrus americanusMegathyrsus maximuse1
- Outcome
- release ratese0
- Direction
- maximume0
- Qualifier
- 0–14 DAMe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum release rates occur in the period of 0–14 DAM”
e1“Pennisetum glaucum and Panicum maximum syn. Urochloa maxima”
Claim · model-written summary
Nitrogen release in the 0–14 day period was more intense with nitrogen fertilization.
- Taxon
- Pennisetum glaucum and Panicum maximum syn. Urochloa maximaCenchrus americanusMegathyrsus maximuse2
- Treatment
- N fertilizatione0
- Outcome
- release ratese1
- Direction
- more intenselye0
- Qualifier
- 0–14 DAMe1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“more intensely with the N fertilization for the N.”
e1“The maximum release rates occur in the period of 0–14 DAM”
e2“Pennisetum glaucum and Panicum maximum syn. Urochloa maxima”
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See all 70 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.