Canola response to nitrogen sources and split application

Revista Brasileira de Engenharia Agrícola e Ambiental

Daga, Jacir¹  Follmann, Paulo E.¹  Campagnolo, Rodrigo¹  Nozaki, Márcia de H.¹  Kaefer, João E.¹  Richart, Alfredo¹ 

[1] Pontifícia Universidade Católica do Paraná, Toledo, Brazil

关键词:  urea;    ammonium sulfate;    protein content;    oil content;    Brassica napus L;   

DOI  :  10.1590/1807-1929/agriambi.v19n11p1042-1048

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

The aim of this study was to evaluate the response of the canola crop to nitrogen (N) sources and split application. The experiment was carried out in two agricultural years (2009 and 2010), at the experimental unit of the Pontifical Catholic University of Paraná - PUCPR, Campus of Toledo. A completely randomized design in 5 x 2 factorial scheme was adopted in the experiment. The treatments consisted of five split applications of N at sowing and/or as top dressing (0 and 0, 120 and 0, 0 and 120, 40 and 80, 80 and 40 kg of N ha-1) and two N sources (ammonium sulfate and urea), with four replicates. The canola genotype Hyola 61 was used in the experiment, which was evaluated for plant height, number of plants m-2, shoot dry matter, leaf area, mass of seedpods plant-1, thousand-grain weight, yield and the contents of protein and oil in the grains. The results show that the variables were not influenced by the evaluated sources of N fertilization, but were significantly influenced by the split application of N, with the highest results obtained for the application of 1/3 at sowing and 2/3 as top-dressing (40 and 80 kg ha-1 of N).

【 授权许可】

Unknown