Impacts of Residue Management Methods and Fertilizer Levels of Nitrogen on Soil Residual Nitrate and Nitrogen Uptake under No-Tillage System of Corn | ||
| تحقیقات سامانهها و مکانیزاسیون کشاورزی | ||
| Article 8, Volume 18, Issue 69, March 2018, Pages 85-96 PDF (594.19 K) | ||
| Document Type: Original Article | ||
| DOI: 10.22092/erams.2017.108069.1144 | ||
| Author | ||
| Majid Roozbeh* | ||
| Abstract | ||
| Residue management and optimizing nitrogen fertilization are important factors in sustainable no tillage systems. A field study was conducted to evaluate the consequence of different residue methods and fertilizer levels of nitrogen on grain nitrogen uptake, accumulation of soil nitrate residual and corn yield under no till system. The experimental design was a randomized complete block with spit-plot arranged in three replications. The residue management systems consisted of three levels of leaving the residues (R.M1), removing residues from field (R.M2) and chopping and leaving the residues on the field (R.M3) as the main plot and four rates of N fertilizer as the subplots which included of: 150, 200, 250 and 300 kg N ha-1. The results showed that different residue managements and N fertilizer rates had a significant effect on soil nitrate accumulation and grain nitrogen uptake. The maximum accumulation of soil nitrate was observed for the R.M2treatment and the minimum soil nitrate residualoccurred for the R.M3.The R.M2 × N3 interaction reduced residual soil nitrate by 27.2% compared to R.M2 × N4 treatment. The findings revealed that R.M3 and R.M1 treatments reduced grain N uptake by 4.5% and 9.4% compared to R.M2, respectively. The results of this study revealed that R.M3× N3 interaction had a greater impact on crop yield and grain N uptake than when R.M3 or N3 treatment was used alone. | ||
| Keywords | ||
| Corn; Nitrate Accumulation; Nitrogen Levels; No-Tillage; Residue management | ||
| References | ||
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