Petrônio Lemos, R. Pereira, M. Cavalcante, A.R.S. Andrade, Preiscilla Vanúbia Queiroz de Medeiros
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引用次数: 0
Abstract
The sunflower is an oilseed species, rustic, cultivated in different agroecosystems. The responses of cultivars to nitrogen fertilization vary according to the cultivar and environment. Therefore, this research aimed to evaluate the response of biometric characters of sunflower cv. Embrapa 122-V2000 under N doses. The experiment was carried out in a randomized block design with five treatments (0, 40, 80, 120 and 160 kg N ha-1) and four blocks. All characters were influenced (p<0.05) by N doses, fitting to the quadratic model. The maximum values of plant height (1.68 m), stem diameter (22.71 mm), leaf area (423.41 cm2), capitulum diameter (15.22 cm), dry biomass yield (6,075.13 kg DM ha-1) and grains (2,982.89 kg ha-1), N use efficiency from biomass (80.3 kg kg-1) and grains (43.27 kg kg-1) close to 90 kg N ha-1, this dose being recommended for the edaphoclimatic conditions of the Agreste Meridional Region of Pernambuco, Brazil.
向日葵是一种油籽，在不同的农业生态系统中种植。品种对氮肥的反应因品种和环境而异。因此，本研究旨在评估向日葵品种Embrapa 122-V2000在N剂量下的生物特征响应。实验采用随机区组设计，有五个处理（0、40、80、120和160 kg N ha-1）和四个区组。所有性状均受到N剂量的影响（p＜0.05），符合二次模型。株高（1.68m）、茎径（22.71mm）、叶面积（423.41cm2）、头状花序直径（15.22cm）、干生物量产量（6075.13kg DM ha-1）和籽粒（2982.89kg ha-1）的最大值，生物量和籽粒的氮利用效率（80.3kg kg-1）接近90kg N ha-1，该剂量被推荐用于巴西伯南布哥Agreste子午线地区的土壤气候条件。
期刊介绍：
Revista de Ciências Agroveterinárias (Journal of Agroveterinary Sciences) (ISSN 2238-1171) focus on publishing original and unpublished tecnical-scientific works regarding on researches in Agrarian and Veterinary Sciences and related areas. The objective of this journal is to publish double-blind peer reviewed research articles, research notes, and review articles contributing significantly for scientific knowledge diffusion and socialization, being made available to libraries of education and research institutions performing scientific activities on plants, animals, and related organisms.
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