Effect of sugarcane trash management at ratoon initiation and ratoon intercropped green manuring practices on the productivity and economics of sugarcane-ratoon-wheat sequence

摘要

A field experiment was conducted during 2002-04 to study the effect of sugarcane trash management at ratoon initiation and ratoon intercropped green manuring practices on productivity and economics of ratoon and wheat Triticum aestivum L. emend. Fiori & paol.) crops in sequence on silty clay loam soil at Pantnagar. Results revealed that trash burning + Sesbania aculeata pers. green manure incorporation gave the highest ratoon cane yield (158 tonnes/ha). This treatment was significantly superior by recording increases of 50.6, 17.7 and 30.9% over trash removal, burning and incorporation treatments, respectively. Ratoon yield attributes, viz. number of milliable canes, cane weight, cane length and internode/cane followed the trend observed in cane yield. In succeeding wheat crop, treatment of trash burning + green manure incorporation in ratoon also recorded highest crop emergence, number of tillers and plant height at 60 days after sowing. It also recorded the highest and significantly high grain and straw yields of wheat by 15.0 and 15.1% than the trash removal by 19.4 and 19.7% than trash burning and by 12.5 and 19.0% over trash incorporation treatments, respectively. This treatment also indicated highest net returns of Rs 1 30 226/ha from the sequence (sugarcane-ratoon-wheat) and was statistically similar to trash burning + green manure mulch and trash removal + green manure incorporation treatments. Irrespective of residue treatments in ratoon a dose of 100% NPK in wheat was found to be better than 75 or 125% NPK doses in terms of productivity and net returns from wheat.