Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Protein and Carbohydrate Fractions in Warm-Season Pastures: Effects of Nitrogen Management Strategies

Full text
Author(s):
Berca, Andressa S. [1] ; Cardoso, Abmael da S. [1] ; Longhini, Vanessa Z. [1] ; Tedeschi, Luis O. [2] ; Boddey, Robert Michael [3] ; Reis, Ricardo A. [1] ; Ruggieri, Ana Claudia [1]
Total Authors: 7
Affiliation:
[1] Sao Paulo State Univ, Dept Anim Sci, BR-14887900 Jaboticabal, SP - Brazil
[2] Texas A&M Univ, Dept Anim Sci, College Stn, TX 77843 - USA
[3] Embrapa Agrobiol, BR-23891000 Seropedica, RJ - Brazil
Total Affiliations: 3
Document type: Journal article
Source: AGRONOMY-BASEL; v. 11, n. 5 MAY 2021.
Web of Science Citations: 1
Abstract

Nitrogen (N) management affects herbage production and chemical composition; however, information on the impact of tropical herbage on N and carbohydrate fractions is scarce. A two-year study was conducted to investigate the potential use of pintoi peanut (Arachis pintoi) compared with N fertilization of palisade grass (Brachiaria brizantha cv. Marandu) by evaluating the herbage chemical composition (fractionation of protein and carbohydrate), herbage mass and accumulation rate, herbage disappearance rate, and stocking rate of pastures. The experiment was conducted in a completely randomized design with three treatments, and four replications (paddocks) were used with twenty-one non-lactating crossbred dairy heifers. Treatments consisted of pastures of palisade grass without a N source (control), fertilized with urea (150 kg/ha/year; fertilized), or mixed with pintoi peanut (mixed). Inclusion of the legume increased concentrations of fractions A (p = 0.009), which is the soluble N compound, and B3 (p < 0.001), which is slowly degraded true protein, compared with pastures fertilized with N and non-fertilized pastures. Nitrogen fertilization increased fraction B1 + B2 (p = 0.046), mainly true proteins, and decreased fraction C (p = 0.0007), indigestible protein, and neutral detergent fiber concentrations (p = 0.0003), contributing to increasing the nutritive value of the herbage. Additionally, N fertilization increased herbage mass (p = 0.004) and herbage allowance (p = 0.0001). Both N fertilization and biologically fixed N increased herbage allowance (p = 0.02) and accumulation rate (p = 0.02), as well as the crude protein content of herbage (p < 0.0001) compared with non-fertilized pastures. Nitrogen fertilization increased true protein and decreased indigestible protein of herbage and promoted a greater herbage mass production, while the inclusion of legumes increased soluble protein and decreased the slowly degraded true protein of herbage. Both N management strategies increased herbage allowance and accumulation rate. (AU)

FAPESP's process: 15/16631-5 - Management strategies to reduce environmental impacts of beef cattle production systems
Grantee:Ricardo Andrade Reis
Support Opportunities: Research Program on Global Climate Change - Thematic Grants
FAPESP's process: 16/11086-1 - Mitigation of greenhouse gases in pastures Marandu Grass managed with legumes or nitrogen fertilizer
Grantee:Vanessa Zirondi Longhini
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 17/11274-5 - Decomposition of litter and greenhouse gases emission in Brachiaria grasses with increasing nitrogen fertilizer rates
Grantee:Abmael da Silva Cardoso
Support Opportunities: Scholarships in Brazil - Post-Doctoral