Sardana, VirenderTejinder Singh2023-12-122023-12-122022Tejinder Singh (2022). Intercropping studies in dual purpose canola quality oilseed rape (Brassica napus L.) (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.https://krishikosh.egranth.ac.in/handle/1/5810202706Present study entitled "Intercropping studies in dual purpose canola quality oilseed rape (Brassica napus L." was carried out at Punjab Agricultural University, Ludhiana, and Regional Research Station, Faridkot during rabi 2020-21 to find out compatible crops and economic feasibility. The soil of the experimental field was loamy sand at Ludhiana and sandy loam at Faridkot, normal in pH, low in available N and high in available P at both locations and for available K soil was low at Ludhiana and high at Faridkot. The experiment consisting of twenty-one treatments, comprising different row spacing, cutting and intercropping of oilseed rape with different crops (Indian rape, oat, linseed, lentil, chickpea, wheat and barley) was laid out in a randomized block design with three replications. Cutting of oilseed rape for green fodder at 45 days after sowing (DAS) significantly reduced the plant height, dry matter accumulation and interception of photosynthetically active radiation (PAR) at 90 DAS and at maturity in comparison to uncut crop. Cutting caused significant delay in initiation and completion of flowering and maturity and significantly reduced the number of secondary branches and siliquae per plant and seeds per siliqua compared to uncut crop. Among different cutting treatments of oilseed rape and closer spacing resulted in higher green fodder yield which ranged between 6.14 and 8.80 t ha. Closer spacing and intercropping resulted in higher interception of PAR. Oilseed rape sown as sole crop at 45 cm row spacing (uncut) produced highest seed yield (2.38-2.53 t ha') and stover yield (9.90- 12.79 t ha) at both locations which were statistically at par with uncut oilseed rape sown at 60 cm row spacing, oilseed rape sown at 22.5 cm row spacing (cutting followed by removal of alternate rows for fodder), oilseed rape sown at 30 cm row spacing (cutting of alternate rows for fodder) and oilseed rape sown at 30 cm row spacing (cutting and removal of altermate rows for fodder). At both locations, the highest oilseed rape equivalent yield (3.47, 3.65 t ha'), gross returns (Rs 179335, 191586 ha'), net returns (Rs 141810, 154060 ha'), land equivalent ratio (1.73, 1.60) and monetary advantage index (Rs 68145, 63433 ha') were observed in oilseed rape sown at 45 cm row spacing (cut) + one row of Indian rape (simultaneous sowing) whereas oilseed rape sowWn at 45 cm row spacing (cut) + one row of oat sown after cutting of oilseed rape resulted in highest area time equivalent ratio. Effect of cutting and different intercrops on oil content and oil quality was inconspicuous. Competition ratio was maximum for oilseed rape t chickpea at Ludhiana and for oilseed rape + lentil at Faridkot. Among different intercropping systems, Indian rape proved dominant to oilseed rape whereas all other component crops (oat, linseed, lentil, chickpea, wheat, barley) were found compatible with oilseed rape.EnglishThesis