Impact of Integrated Nutrient Management on Performance of Oat-grasspea Cropping Systems, Competition Indices and Residual Soil Fertility
Saikat Biswas
Department of Agronomy, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal 741252, India.
Kalyan Jana *
Department of Agronomy, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal 741252, India and AICRP on Forage Crops and Utilization, Directorate of Research, Bidhan Chandra Krishi Viswavidyalaya, Kalyani- 741235, Nadia, West Bengal, India.
Rajeev Kumar Agrawal
ICAR-Indian Grassland and Fodder Research Institute (IGFRI), Division of Crop Production, Jhansi 284003, Uttar Pradesh, India.
Anandamoy Puste
Department of Agronomy, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal 741252, India.
*Author to whom correspondence should be addressed.
Abstract
A field experiment in 3 times replicated split plot design comprising 4 cropping systems (CS) (CS1-Sole oat, CS2- Sole grasspea, CS3 and CS4-oat-grasspea intercropping in 3:2 and 3:3 row ratios, respectively) in main plot and 3 integrated nutrient managements i.e. N2, N3 and N4- 75% N through urea + rest N through FYM, vermi-compost and mustard oilcake, respectively along with N1 – 100% RDF in sub plot, was carried out at Central Research Farm, B.C.K.V., India during winter season of 2015-16 and 2016-17. Pooled results expressed that highest yield of oat (15.40 q/ha) and grasspea (12.44 q/ha) were obtained from CS4 and CS2, respectively, under application of N3. CS4 exhibited greater competition indices (LER: 1.16, RCC: 3.19, Aggressivity index: 0.184, CR: 1.39) and MAI ( 10,685.02) over CS3 under application of N3, showing 16% yield advantage as compared to sole cropping. Soil fertility remained best under CS2 (OC: 0.53%, available N: 218.39 kg/ha, available P2O5: 49.59 kg/ha, available K2O: 215.28 kg/ha) and among oat based CS, in CS4 with N3 application (OC: 0.52%, available N: 196.32 kg/ha, available P2O5: 44.28 kg/ha, available K2O: 194.95 kg/ha).
Keywords: Grasspea, integrated nutrient management, intercropping, oat, yield.