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3 2015, 2(1): 121-134 Back to browse issues page
Effect of planting pattern and split application of nitrogen fertilizer on qualitative traits and grain yield of rice (Oryza sativa L.) var. Koohsar in second cropping
Abstract:   (3031 Views)

In order to investigate the effects of planting pattern and split application of nitrogen fertilizer on qualitative traits and grain yield of rice (var. Koohsar) in second cropping, a field experiment was conducted as split-plot in randomized complete block design with three replications in Research Farm of Amol University in 2013. The treatments included planting pattern in three levels: D1:25×25, D2: 20×20 and D3: 30×10 cm2 as main plot and time of nitrogen split application in five levels (T1: 100% basal fertilizer, T2: 50% basal + 50% tillering stage, T3: 50% basal + 50% panicle initiation stage, T4: 33.33% basal + 33.33% tillering stage + 33.33% panicle initiation stage and T5: 33.33% basal + 33.33% tillering stage + 33.33% full heading stage) as sub plot were studied. Results showed that decreasing of planting density (25×25 cm) and increasing of N split, augmented the qualitative traits. But, with the increasing planting density (30×10 cm), the grain yield increased by 13.8%. Considering interaction effects, the longest grain before cooking was observed in treatment D1T4. The maximum grain yield (3874 kg.ha-1) was observed in treatment T5 split. It could be concluded that the planting pattern of 25×25 cm and splitting of nitrogen fertilizer application in vegetative and reproductive stages, may improve the qualitative yield. However, the planting pattern of 30×10 cm and T3, T4 and T5 split cause the increase of quantitative yield of rice (var. Koohsar) in the second cropping.

Keywords: Density, Grain yield, Nitrogen, Quality, Second cropping
Full-Text [PDF 164 kb]   (1101 Downloads)    
Type of Study: Research | Subject: Ecophysiology
Received: 2016/08/9 | Accepted: 2016/08/9 | Published: 2016/08/9
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Effect of planting pattern and split application of nitrogen fertilizer on qualitative traits and grain yield of rice (Oryza sativa L.) var. Koohsar in second cropping. 3. 2015; 2 (1) :121-134
URL: http://arpe.gonbad.ac.ir/article-1-184-en.html


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Volume 2, Issue 1 (8-2015) Back to browse issues page
تحقیقات کاربردی اکوفیزیولوژی گیاهی Applied Research of Plant Ecophysiology
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