Abstract
Abstract Nitrogen fertilization may affect vegetative growth as well as yield and quality of pods of snap bean [ Phaseolus vulgaris (L.) var. humilis ] plants. A study was conducted to determine the effect of N fertilization on vegetative growth, N partitioning in the plants and production of pods on snap bean plants. Snap bean plants, Bush Blue Lake‐47, were grown under field conditions with N from ammonium nitrate at rates of 0, 4, 8, and 12 g m −2 placed in a band 5 cm to the side and 5 cm below the depth of the seeds at planting time on 10 June 1981 in a Lima silt loam (fine‐loamy, mixed, mesic Glossoboric Hapludalf), a productive soil derived from calcareous glacial till. Rows were 50 cm apart with 22 productive plants m −1 of row (44 plants m −2 ). The fresh weight, dry weight, total N and nitrate N were determined in different parts of the plants at the seedling, bloom, and pod stages. Yield and quality determinations were made on the pods at 10 and 13 August harvests. Fertilizer N decreased growth of the plants in the seedling stage but not by the pod stage. Fertilizer N reduced the number of rhizobium nodules on the roots. At the pod stage, total N was 15.7 g m −2 in plants grown with residual available soil N but without fertilizer N, while total N was 19.5 g m −2 in plants grown with residual soil N plus fertilizer N at 12 g m −2 . Fertilizer N at 4 to 8 g m −2 produced the optimum quality and yield of snap bean pods for processing.
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Claims 6
Claim · model-written summary
Fertilizer nitrogen decreased seedling stage growth.
- Taxon
- snap beant0
- Organ / stage
- seedling stagee0
- Treatment
- Fertilizer Ne0
- Outcome
- growth of the plantse0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“Fertilizer N decreased growth of the plants in the seedling stage”
t0“snap bean”
Claim · model-written summary
Fertilizer nitrogen did not decrease growth by the pod stage.
- Taxon
- snap beant0
- Organ / stage
- pod stagee0
- Treatment
- Fertilizer Ne0
- Outcome
- growth of the plantse0
- Direction
- note0
Not reportedComparator
Verbatim
e0“Fertilizer N decreased growth of the plants in the seedling stage but not by the pod stage”
t0“snap bean”
Claim · model-written summary
Fertilizer nitrogen reduced rhizobium nodule number on roots.
- Taxon
- snap beant0
- Treatment
- Fertilizer Ne0
- Outcome
- number of rhizobium nodules on the rootse0
- Direction
- reducede0
RhizobiumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilizer N reduced the number of rhizobium nodules on the roots”
t0“snap bean”
Claim · model-written summary
At the pod stage, total plant nitrogen was 15.7 g m −2 without fertilizer nitrogen.
Verbatim
e0“At the pod stage, total N was 15.7 g m −2 in plants grown with residual available soil N but without fertilizer N”
t0“snap bean”
Claim · model-written summary
At the pod stage, total plant nitrogen was 19.5 g m −2 with fertilizer nitrogen at 12 g m −2.
Verbatim
e0“total N was 19.5 g m −2 in plants grown with residual soil N plus fertilizer N at 12 g m −2”
t0“snap bean”
Claim · model-written summary
Fertilizer nitrogen at 4 to 8 g m −2 produced optimal snap bean pod quality and yield for processing.
- Taxon
- snap beane0
- Organ / stage
- podse0
- Treatment
- Fertilizer N at 4 to 8 g m −2e0
- Outcome
- quality and yield of snap bean podse0
- Direction
- optimume0
Not reportedComparator
Verbatim
e0“Fertilizer N at 4 to 8 g m −2 produced the optimum quality and yield of snap bean pods for processing”
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