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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Could forage peanut in low proportion replace N fertilizer in livestock systems?

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Author(s):
Longhini, Vanessa Z. [1] ; Cardoso, Abmael S. [1] ; Berca, Andressa S. [1] ; Boddey, Robert M. [2] ; Reis, Ricardo A. [1] ; Dubeux, Jose C. B. [3] ; Ruggieri, Ana C. [1]
Total Authors: 7
Affiliation:
[1] Sao Paulo State Univ, Dept Anim Sci, Jaboticabal, SP - Brazil
[2] Embrapa Agrobiol, Antiga Rodovia Rio Sao Paulo, Seropedica, RJ - Brazil
[3] Univ Florida, North Florida Res & Educ Ctr, Marianna, FL - USA
Total Affiliations: 3
Document type: Journal article
Source: PLoS One; v. 16, n. 3 MAR 3 2021.
Web of Science Citations: 1
Abstract

Palisadegrass {[}Urochloa brizantha (Hochst. ex A. Rich.) R. D. Webster cv. Marandu] is widely used in Brazil and is typically managed with little or no N fertilizer, which often leads to pasture decline in the long-term. The current relationship between beef price and fertilizer cost in Brazil does not favor fertilizer use in pastures. Legume inclusion is an alternative to adding fertilizer N, but often legumes do not reach a significant proportion (> 30%) in pasture botanical composition. This study evaluated herbage responses to N inputs and pasture species composition, under intermittent stocking. Treatments included palisadegrass-forage peanut (Arachis pintoi Krapov. \& W.C. Greg. cv. Amarillo) mixture (mixed), unfertilized palisadegrass (control), and palisadegrass fertilized with 150 kg N ha(-1) yr(-1) (fertilized). Treatments were applied over two rainy seasons with five growth cycle (GC) evaluations each season. Response variables included herbage biomass, herbage accumulation, morphological components, total aboveground N of forage peanut (TAGN(FP)), and contribution of biological N-2 fixation (BNF). Herbage biomass was greater for fertilized palisadegrass {[}5850 kg dry matter (DM) ha(-1)] than for the palisadegrass-forage peanut mixture (3940 kg DM ha(-1)), while the unfertilized palisadegrass (4400 kg DM ha(-1)) did not differ from the mixed pasture. Nitrogen fertilizer increased leaf mass of palisadegrass (2490 kg DM ha(-1)) compared with the control and mixed treatments (1700 and 1310 kg DM ha(-1), respectively). The contribution of BNF to the forage peanut ranged from 79 to 85% and 0.5 to 5.5 kg N ha(-1) cycle(-1). Overall, benefits from forage peanut were minimal because legume percentage was less than 10%, while N input in the system by N-fertilizer increased palisadegrass herbage biomass. (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