Growth analysis of rainfed groundnut (Arachis hypogaea L.) in Manipur valley under polymulch condition

摘要

The field experimentwas conducted at ICAR Research Complex for N.E.H. Region, Manipur centre, Lamphelpat farm, Imphal during rabi season as rainfed. Polymulched flat bed and broad-bed-furrow (BBF) system of sowing revealed the production potential of JL-24 variety (2180.7 kg/ha and 1618.0 kg pod yield/ha respectively) in rabi season over unmulched condition (1063 kg and 875 kg pod yield/ha), respectively. Significantly higher number of pods/plant (28), pod weight/plant (105g) and 100-kernel weight(43g) were obtained in flat bed system with polymulch over unmulched condition. Further, plant height, dry matter accumulation, LAI, LAR, CGR, RGR and NAR were found significantly higher in flat bed with polymulch and was followed by BBF system with polymulch over all the treatments. The vegetative and reproductive phase also differed under polymulched and umulched condition. Germination was recorded 8 days earlier while, maturity was delayed by 15-20 days under polymulched condition. Flat bed system along with polymulch provided highest net return with benefit: cost ratio of 2.93.