The effect of nitrogen, planting density and number of seedling in the main farm on morphologic qualities, functional components and quantitative and qualitative functions of ratoon rice (Oryza sativa L.) production cultivars Sangtarom

Subject Areas : crop production

mohammad reza Khodadadi Balanaghibi ¹ (دانشگاه آزاد اسلامی، واحد ورامین-پیشوا، دانش آموخته کارشناسی ارشد زراعت، ورامین، ایران)
بهرام حيدرنيا سماکوش ² (واحد ورامین-پیشوا، دانش آموخته کارشناسی ارشد زراعت، ورامین، ایران.)

Received: 2010-03-03 Accepted : 2011-07-30 Published : 2010-10-09

Keywords: functional components, morphologic, nitrogen, number of seedling, planting density, quantitative and qualitative function, ratoon.,

Abstract :

To investigate the effects of different amounts of nitrogen, planting density and number of seedling in the main farming on morphologic qualities, functional components and quantitative and qualitative functions of ratoon rice production cultivars Sangtarom, an experiment was conducted on a field in Babol, in 2008. Split factorial experiment was conducted in randomized complete block design in three replications. In this experiment four levels of nitrogen fertilizer (0, 46, 69, 92 kg ha-1 from the urea fertilizer source) were used as main factor and sub factor, including the first two planting densities (120 and 40 plants per square meter respectively, sowing pattern 10 × 8.3 and 16.6 × 15 cm square). For the second factor two planting methods frutescence (single seedling) and univalve (3 seedlings or bud), were used respectively. The result of experiment indicated that maximum ratoon production consumption, respectively 46 and 92 kg N ha-1, also the maximum ratoon production obtained under density 120 plants in square meter and with the three seedlings could create an increase in some functional components, such as the number of panicles in square meter, in the total number of spikelet in panicle, in the number of filled spikelet and in the weight of thousands seeds. Also the quality of amiluze under the consumption of 92 kg N ha-1 by density 120 plants in square meter and also under the condition of univalve planting (3 seedlings) reached to its maximum value.

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