Nitrogen fertilization recommendation for corn cultivated under no-tillage
| Autor: | Helton de S. Silva, Adailson Pereira de Souza |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Environmental Engineering N stock Agriculture (General) chemistry.chemical_element 01 natural sciences Mineralization (biology) Zea mays S1-972 Crop Human fertilization Animal science Yield (wine) Mathematics soil fertility 04 agricultural and veterinary sciences Nitrogen Tillage Nitrogen fertilizer chemistry 040103 agronomy & agriculture 0401 agriculture forestry and fisheries recovery efficiency Soil fertility Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Revista Brasileira de Engenharia Agrícola e Ambiental-Agriambi, Vol 24, Iss 11, Pp 762-768 (2020) Revista Brasileira de Engenharia Agrícola e Ambiental v.24 n.11 2020 Revista Brasileira de Engenharia Agrícola e Ambiental Universidade Federal de Campina Grande (UFCG) instacron:UFCG |
| ISSN: | 1807-1929 |
| Popis: | The amount of nitrogen (N) suggested for corn crop must meet its demand, maximizing yield and minimizing losses. Therefore, the objective of this study was to determine the recommendation of N fertilization for corn grown under no-tillage, using the method that considers the availability of N from the soil, the N requirement for the crop to reach the projected yield and the N-fertilizer recovery efficiency. The experiment consisted of four doses of N (0, 30, 70 and 95 kg ha-1), arranged in randomized blocks, with five repetitions. N stock of 4,357.90 kg ha-1 in the 0-20 cm soil layer provides corn plants with 52.83 kg of N ha-1, corresponding to a mineralization coefficient of 1.2%. The N-fertilizer recovery efficiency and the harvest index show a progressive linear increase according to N doses. In projections of yields lower than 1,000 kg ha-1, N fertilization is not necessary; however, in corn cultivation under no-tillage aiming at yield above 5,000 kg ha-1, fertilization needs to be performed with doses above 100 kg of N ha-1. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|