Nutrient management study on the production of rapeseed (Brassica compestris L. var. toria) at Nawalparasi.

Wasti M. K., K. R. Dahal, K. B. Basnet and N. K. Chaudhary. 2007. IAAS Research Advances Vol. 1. Institute of Agriculture and Animal Sciences, Rampur, Chitwan, Nepal. pp. 19-24.

Keywords: Sulphur, zinc, boron, seed yield, oil content

A field experiment was conducted to study the effect of nutrient management on the production of rapeseed at Prasauni VDC, Nawalparasi district, Nepal during the winter season of 2002/03. The experiment consisted of twelve treatments laid out in Randomized Complete Block Design (RCBD) with four replications. The treatments included: i) control (no fertilizer); ii) FYM (7 mt/ha); iii) 100% NPK (60: 40: 20 kg/ha); iv) FYM and NPK; v) FYM, NPK and Sulpher (25kg/ha); vi) FYM, NPK and Zinc (5 kg/ha); vii) FYM, NPK and Boron (1 kg/ha); viii) FYM, NPK, Sulphur and Zn, ix) FYM, NPK, Sulphur and Boron; x) FYM, NPK, Zn and Boron; xi) FYM, NPK, Sulphur, Zinc and Boron, and xii) FYM, 150% NPK (90: 60: 30 kg/ha), Sulphur, Zinc and Boron. The result showed that combination of NPK and FYM produced significantly higher yield (810. 8 kg/ha) as compared to that produced by FYM (490.8 kg/ha) and NPK (678.4 kg/ha) separately. Addition of sulfur and zinc to NPK and FYM further increased the yield (954.4 kg/ha) significantly, which was similar only to the combination of 150% NPK, FYM and all micronutrients (1007.8 kg/ha). However, in this combination the seed oil content (37.33%) was significantly low as compared to the former combination (44.19%). Thus, the combination of NPK, FYM, Sulphur and Zinc was found more profitable furnishing net return of Rs. 13160 /ha and benefit cost ratio (BCR) of 1.85.