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Rice Residues: From Waste to Wealth through Environment Friendly and Innovative Management Solutions, its Effects on Soil Properties and Crop Productivity

R. K. Naresh
Department of Agronomy, Sardar Vallabhbhai Patel University of Agriculture & Technology, Meerut (UP), India.
Abstract—Rice residues are important natural resources, and recycling of these residues improves the soil physical, chemical and biological properties.Management of rice straw is a major challenge as it is considered to be a poor feed for the animals due to high silica content.A field experiment was conducted over 03 years to review the potential of rice residues and its management options, residue effects on soil properties and crop productivity. A rice-wheat sequence that yields 7 t ha ¨C1 of rice and 4 t ha -1 of wheat removes more than 300 kg N, 30 kg P and 300 kg K ha -1 from the soil. Farmers need to manage 7 t ha -1 of rice residues and overcome the problems for planting wheat. The result showed that before wheat planting, burning results huge losses of N (up to 75%), P (25%), and K (21%) and by incorporation of residues of both crops in rice¨Cwheat rotation increased the available N, P and K contents in soil over removal and burn of residues.Surface retention of residues increases soil N, P and K uptake by 14.6, 28.5 and 17.7 %.Total system productivity increased by 10.9-15.8% in residue retention with permanent wide beds planting, and zero tillage planting system over conventional.Residue management practices affect soil physical properties viz. soil moisture, aggregate formation and bulk density. Extensive tillage with its associated high costs can be reduced by the use of zero-tillage or permanent raised beds with residue retention is needed to insure production sustainability. Thus, if residues are managed properly, then it can warrant the improvements in soil properties and the sustainability in crop productivity.

Index Terms—Rice residue, Burning, Incorporation, Retention, Soil properties, Crop productivity

Cite: R. K. Naresh, "Rice Residues: From Waste to Wealth through Environment Friendly and Innovative Management Solutions, its Effects on Soil Properties and Crop Productivity," International Journal of Life Sciences Biotechnology and Pharma Research, Vol. 2, No. 1, pp. 133-141, January 2013.
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