02873nab a2200289 i 4500003000900000005001700009008004100026040001800067072001400085072000800099100004400107100003100151100003500182100003500217100004800252100002900300100003200329245014500361500007000506520164900576650002202225650003502247650002502282650001902307773017802326856007902504BR-BrBNA20250327133302.0250327b2020    bl.ar|pooa||| 00| 0 eng |  aBR-BrBNAbeng  aP33b1930  aF04  aPereira, Graziella de Andrade Carvalho   aPrimo, Anacláudia Alves   aMeneses, Abner José Girão   aAraújo, Maria Diana Melo de   aPompeu, Roberto Cláudio Fernandes Franco   aGuedes, Fernando Lisboa   aSouza, Henrique Antunes de   aSoil fertility and nutritional status of elephant grass fertilized with organic compost from small ruminant production and slaughter systems  aPublicação on-line; 38 ref.; 3 illus; 7 tables; Sumaries (En)  a

ABSTRACT: The application of organic composts derived from animal husbandry or agro-industry is a promising option to improve nutrient cycling and supply of soils and, consequently, forage production. The objective of this study was to evaluate the soil chemical properties and the nutritional state of elephant grass in response to rates of organic fertilizer composted from the waste of small ruminant production and slaughter systems. The experiment was conducted on a Fluvisol of a forage field with elephant grass var. Cameroon, and was arranged in a randomized block design with split-plots with repeated measures over time. Six rates of organic compost (0, 13.3, 26.6, 39.9, 52.3, and 79.8 t ha-1, in plots) and an additional treatment with mineral fertilizers were evaluated in four growth periods (60, 120, 180, and 240 days, in subplots) with four replications, resulting in a total of 28 plots. Soil fertility was evaluated after the fourth growth period, while leaf analysis was determined in every 60-day period. The increasing rates of organic compost increased the concentrations of OM, NH4 + , NO3 - , NH4 +  + NO3 - , P and base saturation, while the H+Al values decreased and the N and P contents increased in the plants. Compared with mineral fertilization, soil inorganic nitrogen and phosphorus increased by 34 and 97 % in response to the application of organic compost. In response to the application of organic compost, the leaf contents of all studied nutrients remained adequate in all studied periods, except for the macronutrient N and micronutrient Mn.

Keywords: composting, Pennisetum purpureum, organic residue.  aANÁLISE DO SOLO  aPROPRIEDADE FÍSICO-QUÍMICA  aRESÍDUO ORGÂNICO  aCAPIM ELEFANTE0 0808dViçosa-MG Sociedade Brasileira de Ciência do Solo 1977o2024-5955tRevista Brasileira de Ciência do Solo (Brazil)x0100-0683gv. 44 p. 1-15 ; (2020)wBR2024005022  uhttps://www.scielo.br/j/rbcs/a/6pCY9J6Tq7WtCgYdfgxsCMj/?format=pdf&lang=en