Effect of organic nitrogen nutrition on yield, quality, nutrient uptake and economics of rice (Oryza sativa) - table pea (Pisum sativum var. hortense) - onion (Allium cepa) cropping sequence.

摘要

A field experiment was conducted during 2003-05 to study the effect of various sources (farmyard manure, vermicompost and poultry manure) and rates of organic manures (100, 125 and 150% recommended nitrogen dose) on yield, quality of produce, soil quality and economics of rice (Oryza sativa L.) - table pea (Pisum sativum L. var. hortense) - onion (Allium cepa L.) cropping sequence. Poultry manure at 150% recommended nitrogen dose gave higher grain yield (5.79 tonne/ha) of rice, green pod yield (7.07 tonne/ha) of table pea and bulb yield (27.08 tonne/ha) of onion. Application of poultry manure resulted improved values of soil organic carbon, NPK uptake and soil biological properties compared to varying doses of vermicompost and farmyard manure and over the control. Physical properties of soil, viz bulk density and water stable aggregates were not affected due to nitrogen management through organic sources. Economic analysis revealed that the highest rice equivalent yield and maximum net profit (Rs 130 799/ha) from rice-table pea-onion sequence were recorded with the application of 150% recommended nitrogen dose through poultry manure.