NITROGEN, ABSCISSION OF REPRODUCTIVE ORGANS AND SEED YIELD OF DRY BEAN
Some studies have demonstrated that nitrogen availability in the environment affects the bean (Phaseolus vulgaris L.) seed yield. Nevertheless, little work has been conducted to study the effect of N on the production and abscission of reproductive organs and its relationship with pod number and yield at physiological maturity (PM). In this study, the cv. Cacahuate 72 (type I) was hidroponically grown, with a Steiner nutrient solution. Two experiments were conducted. In Experiment 1 irrigation was done with a complete solution (100 % N) from seeding to: 1) 25 and 30 days after sowing (das, preflowering), 2) 38 and 45 das (beggining and middle of flowering), and 3) 65 das (pod filling). Afterwards, all plants were irrigated with a reduced solution (50 % N); two additional treatments were 50 % N and 100 % N (control) imposed during the whole cycle. Experiment 2 involved 8 days of N deprivation (0 % N) starting at: 1) 22 das (preflowering), 30 das (flowering initiation), 3) 38 das (middle flowering), and 4) without N deprivation (control). In both experiments a completely randomized design was used. The results indicated that N deprivation caused significant differences in the production and abscission of reproductive organs, but without effects on the number of mature pods at physiological maturity or on the final seed yield.
| Main Authors: | , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Colegio de Postgraduados
1996
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| Online Access: | https://www.agrociencia-colpos.org/index.php/agrociencia/article/view/1404 |
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