Abstract
Abstract The influence of inorganic nitrogen on the development of mycorrhizal symbiosis in Vigna unguiculata (L.) Walp cv. California Blackeye No. 5 (cowpea) was studied in a noneroded oxisol and an oxisol subjected to simulated erosion. Plants were grown in pots containing soil inoculated with the vesicular‐arbuscular mycorrhizal (VAM) fungus Glomus aggregatum and amended with 0–100mg N kg‐1 soil. Vesicular‐arbuscular mycorrhizal colonization of roots, shoot P and N status, and shoot, root, and nodule dry weights were significantly stimulated by amendment of the eroded soil with N. However, the response of root colonization, shoot P concentration, and nodule dry weight to N application of the noneroded soil was not significant. The relationship of N with root colonization and shoot P status was described by a linear model while the relationships between N and other variables measured were described by quadratic equations. The results illustrate the potential benefits of starter N in the establishment of mycorrhizal and nodulated cowpeas in eroded soils.
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Claims 7
Claim · model-written summary
Nitrogen significantly stimulated mycorrhizal root colonization in eroded soil.
- Taxon
- Vigna unguiculata
Vigna unguiculatae1 - Treatment
- amendment of the eroded soil with Ne0
- Outcome
- Vesicular‐arbuscular mycorrhizal colonization of rootse0
- Direction
- stimulatede0
Not reportedInteractorComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vesicular‐arbuscular mycorrhizal colonization of roots, shoot P and N status, and shoot, root, and nodule dry weights were significantly stimulated by amendment of the eroded soil with N.”
e1“Vigna unguiculata (L.) Walp cv. California Blackeye No. 5 (cowpea)”
Claim · model-written summary
Nitrogen significantly stimulated shoot phosphorus and nitrogen status in cowpea grown in eroded soil.
- Taxon
- Vigna unguiculataVigna unguiculatae1
- Treatment
- amendment of the eroded soil with Ne0
- Outcome
- shoot P and N statuse0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“shoot P and N status, and shoot, root, and nodule dry weights were significantly stimulated by amendment of the eroded soil with N.”
e1“Vigna unguiculata (L.) Walp cv. California Blackeye No. 5 (cowpea)”
Claim · model-written summary
Nitrogen significantly stimulated shoot, root, and nodule dry weights in eroded soil.
- Taxon
- Vigna unguiculataVigna unguiculatae1
- Treatment
- amendment of the eroded soil with Ne0
- Outcome
- shoot, root, and nodule dry weightse0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“shoot, root, and nodule dry weights were significantly stimulated by amendment of the eroded soil with N.”
e1“Vigna unguiculata (L.) Walp cv. California Blackeye No. 5 (cowpea)”
Claim · model-written summary
Nitrogen effects on root colonization, shoot phosphorus and nodule dry weight in noneroded soil were not significant.
- Taxon
- Vigna unguiculataVigna unguiculatae1
- Treatment
- N application of the noneroded soile0
- Outcome
- root colonization, shoot P concentration, and nodule dry weighte0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the response of root colonization, shoot P concentration, and nodule dry weight to N application of the noneroded soil was not significant.”
e1“Vigna unguiculata (L.) Walp cv. California Blackeye No. 5 (cowpea)”
Claim · model-written summary
Nitrogen related linearly to root colonization and shoot phosphorus status.
Not reportedTaxonDirection
Verbatim
e0“The relationship of N with root colonization and shoot P status was described by a linear model”
Claim · model-written summary
Nitrogen relationships with the other measured variables followed quadratic equations.
Not reportedTaxonDirection
Verbatim
e0“the relationships between N and other variables measured were described by quadratic equations.”
Claim · model-written summary
The authors conclude starter nitrogen could benefit establishment of mycorrhizal and nodulated cowpea in eroded soil.
- Taxon
- cowpeasVigna unguiculatae0
- Treatment
- starter Ne0
- Outcome
- establishment of mycorrhizal and nodulated cowpease0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results illustrate the potential benefits of starter N in the establishment of mycorrhizal and nodulated cowpeas in eroded soils.”
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See all 11 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.