Growth and yield of sugarcane as influenced by nitrogen levels and green manuring

Devendra Singh; Yadav, R.L.; Singh, J.P.; Pande, R.

Indian Journal of Plant Physiology 9(3): 269-274

2004


ISSN/ISBN: 0019-5502
Accession: 004180348

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Abstract
Dhaincha (Sesbania aculeata) was sown as an intercrop (one and 2 rows) between 2 rows of sugarcane 30 days after spring planting of sugarcane and green manuring (in situ) 45 and 60 days after sowing (DAS). Variations in shoot and root biomass (kg/ha), fresh weight of root nodules (kg/ha) and nitrogen accumulation (kg/ha) in dhaincha were observed. The highest shoot and root biomass and nitrogen accumulation was observed 60 DAS with 2-row dhaincha intercropping. Application of 225 kg N/ha to sugarcane produced higher shoot biomass in the crop. Sugarcane yield was significantly reduced when 2 rows of dhaincha were incorporated (green matured, in situ) 60 DAS. This was largely due to the reduction in biomass and leaf area of the crop. Ratoon yield, on the other hand, significantly increased (5-8%) with dhaincha green manuring. The highest ratoon yield was observed with 2-row dhaincha intercropping 60 DAS. The results indicate that integrated nutrient management in sugarcane can be practiced by green manuring with dhaincha intercrop and fertilizer N application to sustain the yield of sugarcane-ratoon system.