Correlation studies on nitrogen for sunflower crop across the agroclimatic variability
2016
Nasim, W. | Belhouchette, Hatem | Tariq, M. | Fahad, S. | Hammad, H.M. | Mubeen, M. | Munis, M.F.H. | Chaudhary, H.J. | Khan, I. | Mahmood, F. | Abbas, T. | Rasul, F. | Nadeem, M. | Bajwa, A.A. | Ullah, N. | Alghabari, F. | Saud, S. | Mubarak, H. | Ahmad, R. | COMSATS Institute of Information Technology [Islamabad] (CIIT) | Centre International de Hautes Etudes Agronomiques Méditerranéennes - Institut Agronomique Méditerranéen de Montpellier (CIHEAM-IAMM) ; Centre International de Hautes Études Agronomiques Méditerranéennes (CIHEAM) | Fonctionnement et conduite des systèmes de culture tropicaux et méditerranéens (UMR SYSTEM) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Centre International de Hautes Etudes Agronomiques Méditerranéennes - Institut Agronomique Méditerranéen de Montpellier (CIHEAM-IAMM) ; Centre International de Hautes Études Agronomiques Méditerranéennes (CIHEAM)-Centre International de Hautes Études Agronomiques Méditerranéennes (CIHEAM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) | Central Cotton Research Institute (CCRI) | Huazhong Agricultural University [Wuhan] (HZAU) | Quaid-i-Azam University (QAU) | University of Agriculture Faisalabad (UAF) | Government College University of Faisalabad (GCUF) | Universiti Teknologi PETRONAS (UTP) | Washington State University (WSU) | Memorial University of Newfoundland = Université Memorial de Terre-Neuve [St. John's, Canada] (MUN) | The University of Sydney | Faculty of Meteorology, Environment & Arid Land Agriculture ; King Abdulaziz University | Northeast Agricultural University [Harbin] | Central South University [Changsha] | Agricultural University Peshawar | Chercheur Sud Doctorant Sud
International audience
Afficher plus [+] Moins [-]anglais. Nitrogen (N) fertilizer is an important yield limiting factor for sunflower production. The correlation between yield components and growth parameters of three sunflower hybrids (Hysun-33, Hysun-38, Pioneer-64A93) were studied with five N rates (0, 60, 120, 180, 240 kg ha−1) at three different experimental sites during the two consecutive growing seasons 2008 and 2009. The results revealed that total dry matter (TDM) production and grain yield were positively and linearly associated with leaf area index (LAI), leaf area duration (LAD), and crop growth rate (CGR) at all three sites of the experiments. The significant association of yield with growth components indicated that the humid climate was most suitable for sunflower production. Furthermore, the association of these components can be successfully used to predict the grain yield under diverse climatic conditions. The application of N at increased rate of 180 kg ha−1 resulted in maximum yield as compared to standard rate (120 kg ha−1) at all the experimental sites. In this way, N application rate was significantly correlated with growth and development of sunflower under a variety of climatic conditions. Keeping in view such relationship, the N dose can be optimized for sunflower crop in a particular region to maximize the productivity. Multilocation trails help to predict the input rates precisely while taking climatic variations into account also. In the long run, results of this study provides basis for sustainable sunflower production under changing climate.
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