Response of late planted linseed (Linum csitatissimum) varieties to nitrogen levels under rainfed coilditions

Abstract

A field experiment was conducted during the winter season of 1997 98 and 1998 99 at Sagar, Madhya Pradesh, on clay soils, to find out the most suitable variety and economical nitrogen dose for sustainable grain yield and economics of lineseed (Linum usitatissimum L.) under rained condition. The field triai was laid out in split plot design, comprising 5 varieties [ SLS 21 , SLS 9 , SLS 7 , RLC 29 ( Sheetal ) and T 397 1 as main and 4 nitrogen levels (30, 40, 50 and 60 kglha) in subtreatment plots, replicated thrice. RLC 29 ( Sheetal ) recorded significantly higher values of almost all the growth and yield parameters, grain yield (qlha) and economics over other varieties except plant height (cm), seeds1 capsule and harvest index (%) in pooled data. Though higher dose of 60 kg Nlha produced significantly higher growth as well as sink parameters, 1,000 seed weight (g), grain yield (qlha) and economics revealed possibility of saving 10 kg Nlha. Interaction study, however, showed that different growth and sink parameters were influenced significantly by N levels irrespective of varieties, but RLC 29 revealed higher both growth and yield attributes including grain yield which gave good economics and proved most economical variety for late planting, especially after soybean and gave 57.51, 11.69, 14.44 and 22.53% more grain yield than SLS 21 , SLS 9 , SLS 7 and T 397 respectively. Further, 9.03 and 27.07% more grain yield was noted with 50 kg Nlha over 40 and 30 kg Nlha respectively.