2026-09-14T13:01:00Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/81932023-12-13T01:05:24Zcom_10259.4_2516com_10259_5086com_10259_2604col_10259.4_2517

Mvila, Beaufray Gilaime Pilar Izquierdo, María Concepción Busto Núñez, Mª Dolores Pérez Mateos, Manuel Ortega Santamaría, Natividad 2023-12-12T11:19:30Z 2023-12-12T11:19:30Z 2020-01 http://hdl.handle.net/10259/8193 10.1590/1678-992X-2018-0227 1678-992X In this work, barley seed coating with urease and phosphatase, free and immobilized in humic acids, was studied as a tool to enhance the use efficiency of N and P by plants. The seeds were encapsulated in gels of Ca-alginate by a method that allows gelation of the polymer, containing enzymes, from the surface of seeds outward. The coating process did not affect seed germination. A pot experiment with the coated seeds was carried out. The seed coating with free enzymes increased soil ammonium-N (NH4+-N) and inorganic P up to 39 and 54 %, respectively, and up to 62 and 64 %, with the immobilized enzymes, in comparison with control pots. Seed coating improved N (47-137 %) and P (29-61 %) uptake by plants. Moreover, a synergistic response in N and P uptake with both urease and phosphatase was observed. It can be concluded that the seed coating with urease and phosphatase exerted a positive effect enhancing the use of N and P by plants, which could lead to the development of natural fertilizers, minimizing the application of chemical fertilizers. application/pdf eng Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz Scientia Agricola. 2020, V. 77, n. 6 https://doi.org/10.1590/1678-992X-2018-0227 Atribución 4.0 Internacional http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Soil enzymes Seed encapsulation Plant nutrients uptake Humic acids Bioquímica Alimentos Biochemistry Food Barley seed coating with urease and phosphatase to improve N and P uptake info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Scientia Agricola 77 6