Th effect of planting dates and different level of nitrogen on the yield , yield componenet and some of the quantitative and qualitative features of rice

Research Aim:In order to investigate the effect of different amounts of nitrogen fertilizer and planting date on yield, yield components and some quantitative and qualitative characteristics of rice, this experiment was conducted in 2017 in Lundwil Astara region. Researchmethod: Experiment was conducted in split plot design with randomized complete block design with three replications. The main factor was four levels of nitrogen fertilizer zero, 50, 100 and 150 kg of urea fertilizer per hectare and the sub factor included three planting dates 10, 20 and 30 May. The rice variety used in this experiment was Hashemi variety. Findings: The phonological traits of days to emergence of heading, 50% flowering were affected by the main effects of nitrogen fertilizer and planting date, and 100 and 150 kg N / ha caused the highest amount of these traits. Also, the interaction effect of nitrogen and planting dates on day to physiological maturity was significant. Plant height at 1% probability level was affected by nitrogen fertilizer. The effect of nitrogen and planting dates on the number of fertile tiller per plant was non-significant, but its number per unit area was significantly affected by nitrogen fertilizer. The length of the panicle was influenced by the planting date at the probability level of 5% and the second sowing date was the longest head length. The effect of fertilization on the level of 1% probability on total number of seeds per panicle was significant. The effect of experiment factors on biological yield and grain yield was significant at 5% probability level. Among the qualitative traits, the interaction of factors on healthy grain, broken grain, and amylase and protein percentage was significant. Also, gelatinization temperature was affected by nitrogen fertilization at 5% probability level. Conclusion: The best treatment combination in this trait was 150 kg N ha-1 on the planting date of May 10th. The highest number of total fertile tillers (831.7 per m2) was obtained by using the highest level of fertilizer and the lowest was belonging to control treatment. The highest (110.4 numbers) was obtained by using 100 kg N / ha. The lowest amount of this trait was found in the control treatment. The weight of 1000 seeds was not influenced by any of the test factors. The highest biological yield (1281.4 g per m2) was obtained from 150 kg N ha-1 fertilizer treatment, as well as the planting date of May 20, was caused the highest trait (1212.3 g per m2). The highest grain yield in Hashemi rice (488.1 g per m2) was obtained from the application of 100 kg N fertilizer per hectare. At the sowing date of May 30, grain yield was highest (482.0 g per m2). Application of 100 kg Nitrogen per hectare on the planting date of May 30 was the best treatment composition in healthy grain rice percentage, while 150 kg of nitrogen fertilizer per hectare had the highest percentage of broken grain rice on the third planting date. The highest percentage of rice grain amylase was obtained from 50 kg N ha-1 compound at planting date of May 10 and consumption of 100 kg N ha-1 at the planting date of 20 May. The highest gelatinization temperature was obtained using 150 kg N ha-1 The highest percentage of rice protein content in Hashemi (8.6%) was obtained from the application of 100 kg N per ha on sowing date of 10 May. The highest plant height was obtained from 150 kg N/ ha treatment and the lowest was belong to control treatment