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Effect of planting methods and plant density on grain yield and agronomic characteristics of sunflower (Helianthus annuus L.) under rainfed conditions
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Reza Rahimzadeh   , Tohid Najafi Mirak |
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Abstract: (5717 Views) |
| In order to study the effects of planting methods and plant density on sunflower grain yeild, a field experiment was conducted in the Dryland Agricultural Research Institute (DARI), Margheh, Iran, in 2000 and 2002 cropping seasons. This experiment was carried out, with two factors, in a split arrangement using Randomized Complete Blocks Design with four replications. Planting methods were assigned to mian plots and included planting with planter with 60 cm row spacing and broadcast + disk harrow (control). Plant densities included, 83000, 55000 and 42000 plant.ha-1 and were randomized in sub-plots. Grain yield, plant height, stem diameter, head diameter, leaf number/plant, plant per square meter (plant.m-2) and 1000 grain weight were measured. Ccombined analysis of variance showed that the effect of planting methods was significant (P<0.05) on grain yield, plant height and leaf numbers. The effect of planting methods on plant.m-2, head diameter and 1000 grain weight was highly significant (P<0.01). Mechanized planting method (average 536 kg.ha-1) had the highest grain yield. Plant density had highly significant effect (P<0.01) on head diameter, plant.m-2 and 1000 grain weight. Stem diameter was also significantly affected (P<0.05) by plant density. However, the effect of plant density on grain yield was not significant. Decreasing plant density increased head diameter, stem diameter and 1000 grain weight.. Planting method plant density interaction was significant on head diameter. It is concluded that mechanized planting method could be recommended for sunflower crop under dryland conditions in Maragheh region. |
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| Keywords: Dryland, Grain yield, Plant density, Planting method and Sunflower. |
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Full-Text [PDF 308 kb]
(3815 Downloads)
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Type of Study: Scientific & Research |
Subject:
Special
Received: 2015/02/22 | Accepted: 2015/02/22 | Published: 2015/02/22
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