Bibliographic Details
| Title: |
Biomass allocation and growth strategies of tropical forage legumes under effects of nitrogen application at planting. |
| Authors: |
Colanigo, Jaqueline Silva, da Costa, Ricardo Lopes Dias, Premazzi, Linda Mônica, Batista, Karina, de Mattos, Waldssimiler Teixeira, Barbosa, Cristina Maria Pacheco, Gerdes, Luciana, Leyva, Dixan Pozo, Casanova-Lugo, Fernando, Gimenes, Flavia Maria de Andrade |
| Source: |
Plant Ecology; Mar2025, Vol. 226 Issue 3, p225-235, 11p |
| Subject Terms: |
CROP science, BOTANY, AGRICULTURE, LIFE sciences, LEAF area |
| Abstract: |
The growth strategies used by plants can be influenced by nutrient availability. We aimed to evaluate the allocation of biomass and root morphology traits of tropical legumes under the effects of nitrogen (N) application. Two experiments were conducted where the treatments were three species of legumes: macrotyloma (Macrotyloma axillare), perennial soybean (Neonotonia wightii), and rhizoma peanut (Arachis pintoi); with three doses of N (0, 40 and 80 kg ha−1) applied at planting. Both experiments took place in a randomized block design, with four and three replications in Experiments I and II, respectively. Biomass allocation in shoots/roots and root morphology were evaluated. In general, macrotyloma presented the greatest biomass allocation in leaves (P < 0.05): average leaf mass (19.69 g), leaf area (3,495.0 cm2), specific leaf area (SLA) (212.88 cm2g−1), leaf/branch ratio (1.33), and also had a longer specific root length (SRL) (1326.45 cm2g−1), although perennial soybean had the greatest root mass (P < 0.0001) (21.90 g). In contrast, rhizoma peanut had the largest branch mass (P < 0.0001), and the lowest SLA (89.07 cm2g−1), and SRL (379.00 cm2g−1), values in the advanced development stages, associated with plants having a more resource-conservative growth strategy, generating slower growth. Contrarily, the macrotyloma strategy was more resource-acquisitive, and the perennial soybean was positioned between the other two species. The results made it possible to differentiate the growth strategies of the species. The nitrogen application at planting had no mensurable benefits on plant growth and had variable or no effect on biomass allocation and root traits. [ABSTRACT FROM AUTHOR] |
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| Database: |
Complementary Index |
