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Availability of phosphorus and soybean yield in crop rotation with Congo grass

Grant number: 14/23707-5
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): May 01, 2015
Effective date (End): May 31, 2018
Field of knowledge:Agronomical Sciences - Agronomy - Soil Science
Acordo de Cooperação: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal Investigator:Ciro Antonio Rosolem
Grantee:Danilo Silva Almeida
Host Institution: Faculdade de Ciências Agronômicas (FCA). Universidade Estadual Paulista (UNESP). Campus de Botucatu. Botucatu , SP, Brazil


Crop rotation with Urochloa ruziziensis during the off season of soybean has been widely adopted due to the appropriate size of this grass and the several benefits to soil fertility, such as phosphorus (P) cycling. However, has been observed reduction of soybean yield when cultivated after U. ruziziensis, which seems to compete with soybean by soil P, since the reduction is not observed in cases with phosphorus fertilization. There are reports that the same does not occur after U. brizantha cultivation. The main objective of this work is to determine whether the reduction of soybean yield when cultivated after U. ruziziensis occurs in function of P forms in the soil caused of the U. ruziziensis cultivation. It will be conducted 4 experiments. The first is a long-term field experiment, that half of the plots are cultivated with U. ruziziensis in the off season of soybean, whereas the other half remains with no crop. Beside the treatments with and without Congo grass, it will be evaluated three levels of P (0, 30, and 60 kg ha-1 of P2O5) applied in the seed furrow of soybean. The second experiment it will be conducted in pots, comparing the soybean development after three species of grasses (U. ruziziensis, U. brizantha, Panicum maximum), as well as the effect of these species in the soil according with the P level. In the third trial it will be evaluated the dynamic of P forms in the rhizosphere of soybean, maize, and white lupin after the cultivation of the three grasses. A fourth trial will be conducted in order to compare the exsudation of organic acids of U. ruziziensis and U. brizantha. (AU)

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Scientific publications (5)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
ALMEIDA, D. S.; MENEZES-BLACKBURN, D.; ROCHA, K. F.; DE SOUZA, M.; ZHANG, H.; HAYGARTH, P. M.; ROSOLEM, C. A.. Can tropical grasses grown as cover crops improve soil phosphorus availability?. SOIL USE AND MANAGEMENT, v. 34, n. 3, p. 316-325, . (14/23707-5, 15/04200-0)
ALMEIDA, DANILO S.; MENEZES-BLACKBURN, DANIEL; ZHANG, HAO; HAYGARTH, PHILIP M.; ROSOLEM, CIRO A.. Phosphorus availability and dynamics in soil affected by long-term ruzigrass cover crop. Geoderma, v. 337, p. 434-443, . (15/04200-0, 14/23707-5)
ALMEIDA, DANILO SILVA; DELAI, LUCAS BENES; HELENA FRANKLAND SAWAYA, ALEXANDRA CHRISTINE; ROSOLEM, CIRO ANTONIO. Exudation of organic acid anions by tropical grasses in response to low phosphorus availability. SCIENTIFIC REPORTS, v. 10, n. 1, . (14/23707-5, 15/04200-0)
ALMEIDA, DANILO S.; ROCHA, KASSIANO F.; DE SOUZA, MURILO; DELAI, LUCAS B.; ROSOLEM, CIRO A.. Soil Phosphorus Bioavailability and Soybean Grain Yield Impaired by Ruzigrass. AGRONOMY JOURNAL, v. 110, n. 2, p. 654-663, . (14/23707-5, 15/04200-0)
ALMEIDA, DANILO S.; MENEZES-BLACKBURN, DANIEL; TURNER, BENJAMIN L.; WEARING, CATHERINE; HAYGARTH, PHILIP M.; ROSOLEM, CIRO A.. Urochloa ruziziensis cover crop increases the cycling of soil inositol phosphates. BIOLOGY AND FERTILITY OF SOILS, v. 54, n. 8, p. 935-947, . (15/04200-0, 14/23707-5)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
ALMEIDA, Danilo Silva. Disponibilidade de fósforo e produtividade de soja em rotação com braquiária ruziziensis. 2018. Doctoral Thesis - Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agronômicas. Botucatu Botucatu.

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