Yield and quality of densely cultivated onion cultivars as function of nitrogen fertilization
| Autor: | Valdívia de Fátima Lima Sousa, Francisco Irael de Souza, Luiz Ricardo Rebouças da Silva, Leilson Costa Grangeiro, Jandeilson P. dos Santos, Francisco das Chagas Gonçalves |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Fertigation Allium cepa Environmental Engineering Agriculture (General) Randomized block design chemistry.chemical_element plant nutrition 01 natural sciences S1-972 classification of bulbs chemistry.chemical_compound Cultivar Mathematics Pungency Crop yield 04 agricultural and veterinary sciences Nitrogen Horticulture chemistry Chlorophyll 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Agronomy and Crop Science Plant nutrition economic indicators 010606 plant biology & botany |
| Zdroj: | Revista Brasileira de Engenharia Agrícola e Ambiental v.23 n.11 2019 Revista Brasileira de Engenharia Agrícola e Ambiental Universidade Federal de Campina Grande (UFCG) instacron:UFCG Revista Brasileira de Engenharia Agrícola e Ambiental-Agriambi |
| ISSN: | 1807-1929 1415-4366 |
| Popis: | Nitrogen exerts a marked influence on the yield and quality of the onion. The present work was developed from June to October 2016, aiming to evaluate the yield and quality of two cultivars of onion under a system densified as a function of nitrogen doses in Mossoró, RN, Brazil. A randomized block design was used in a 2 x 7 factorial scheme, with four repetitions, corresponding to two cultivars (IPA 11 and Rio das Antas) and seven nitrogen doses (0, 45, 90, 135, 180, 225 and 270 kg ha-1 of N), provided by fertigation, with four repetitions. The dose of 92 kg ha-1 of N provides the highest total and marketable yields of bulbs. Nitrogen fertilization increases the concentrations of N, chlorophyll a, b and total in the leaves of the onion, as well as the percentage of bulbs of classes 3 and 4 and the pungency, reducing the percentage of bulbs of class 2 and non-commercial. The doses of 108 and 82 kg ha-1 of N provide the highest rates of return for ‘IPA 11’ (R$ 2.07) and ‘Rio das Antas’ (R$ 2.41), respectively. |
| Databáze: | OpenAIRE |
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