Abstract
Cowpea has great capacity of biological fixation of nitrogen (BFN) in association with Rhizobium. However, it is not known whether the interaction of liming, mineral N fertilization, and Rhizobium-inoculated seeds can modify the efficiency of BFN, and still, result in gains in biomass production and yield in cowpea. This study evaluated the use of liming associated to Rhizobium-inoculated seeds and supplemental mineral N fertilization on the nodulation improvement, biomass production, and on the increase of cowpea grain production. Two experiments were conducted under field conditions in two consecutive years, using the same treatments and experimental design. The treatments were conditioned in a split-plot scheme in randomized blocks with four replications in a 2 × 6 factorial, the first factor being two cowpea cultivars (BRS Tapaihum and BRS Marataoã) and the second factor was considered six conditions of corrective practice and N supply [no N supply and no liming (T1), liming + rhizobium (T2), rhizobium (T3), liming + mineral N (T4), liming (T5), and liming + mineral N + rhizobium (T6)]. Nitrogen concentration and accumulation in the leaves increased with liming and N supply (T2, T4, and T6) and increased dry matter (DM) accumulation in the stem, leaves, shoots, and total DM. The absence of liming limited root length growth, decreased root DM, and the number and DM of nodules thus limiting grain production. Additionally, N fertilization supplemented with Rhizobium-inoculated seeds did not increase grain production. However, the use of liming and the inoculation of seeds with Rhizobium increased plant performance and improved grain yield of both cowpea cultivars.
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Claims 9
Claim · model-written summary
Liming and nitrogen supply increased leaf nitrogen concentration and accumulation in cowpea.
- Taxon
- cowpea
Vigna unguiculatat0 - Treatment
- liming and N supplye0
- Outcome
- Nitrogen concentration and accumulation in the leavese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen concentration and accumulation in the leaves increased with liming and N supply (T2, T4, and T6)”
t0“cowpea”
Claim · model-written summary
Liming and nitrogen supply increased cowpea dry matter accumulation in stems, leaves, shoots and total biomass.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- liming and N supplye0
- Outcome
- dry matter (DM) accumulation in the stem, leaves, shoots, and total DMe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen concentration and accumulation in the leaves increased with liming and N supply (T2, T4, and T6) and increased dry matter (DM) accumulation in the stem, leaves, shoots, and total DM”
t0“cowpea”
Claim · model-written summary
Absence of liming limited cowpea root length growth.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- absence of liminge0
- Outcome
- root length growthe0
- Direction
- limitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The absence of liming limited root length growth”
t0“cowpea”
Claim · model-written summary
Absence of liming decreased cowpea root dry matter.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- absence of liminge0
- Outcome
- root DMe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The absence of liming limited root length growth, decreased root DM”
t0“cowpea”
Claim · model-written summary
Absence of liming decreased cowpea nodule number and dry matter.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- absence of liminge0
- Outcome
- number and DM of nodulese0
- Direction
- decreasede0
Not reportedInteractorComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The absence of liming limited root length growth, decreased root DM, and the number and DM of nodules”
t0“cowpea”
Claim · model-written summary
Absence of liming limited cowpea grain production.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- absence of liminge0
- Outcome
- grain productione0
- Direction
- limitinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The absence of liming limited root length growth, decreased root DM, and the number and DM of nodules thus limiting grain production”
t0“cowpea”
Claim · model-written summary
Nitrogen fertilization with Rhizobium inoculation did not increase cowpea grain production.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- N fertilization supplemented with Rhizobium-inoculated seedse0
- Outcome
- grain productione0
- Direction
- did not increasee0
RhizobiumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N fertilization supplemented with Rhizobium-inoculated seeds did not increase grain production”
t0“cowpea”
Claim · model-written summary
Liming and Rhizobium seed inoculation increased cowpea plant performance.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- the use of liming and the inoculation of seeds with Rhizobiume0
- Outcome
- plant performancee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the use of liming and the inoculation of seeds with Rhizobium increased plant performance”
t0“cowpea”
Claim · model-written summary
Liming and Rhizobium seed inoculation improved grain yield in both cowpea cultivars.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- the use of liming and the inoculation of seeds with Rhizobiume0
- Outcome
- grain yielde0
- Direction
- improvede0
- Qualifier
- both cowpea cultivarse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the use of liming and the inoculation of seeds with Rhizobium increased plant performance and improved grain yield of both cowpea cultivars”
t0“cowpea”
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See all 9 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.