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A study was carried out at Student’s Farm, School of Organic Farming, Punjab Agricultural University, Ludhiana and PAU Regional Research Station Bathinda, during rabi 2018-19. The experimental sites were normal soil pH and electrical conductivity, low in organic carbon and available N and medium in available P and K on both locations. The investigation consisted of 13 treatments each having different levels of nitrogen and phosphorus and two methods of biofertilizers application that were seed treatment and soil application. Results revealed that highest growth and yield attributing characters were found in treatments where 12.5 and 25 % less dose of chemical fertilizers with combination of biofertilizers were applied. Means biofertilizers have capacity to supply nutrients to plants even with less doses of chemical fertilizers. The results showed a higher number of tillers, effective tillers, number of grains/ear, 1 000-grain weight and grain yield of wheat with decreasing nutrient levels up to 75 % of recommended dose of fertilizers. However highest grain yield of wheat (5435 and 5417 kg ha-1) was recorded under 87.5 % RDF applied treatments with biofertilizers, and lowest grain yield was recorded in treatments T1 (control plot). Determination of correlation matrix revealed that crop yield was perfectly positively correlated with crop growth parameters like dry matter accumulation, LAI, tiller number m-2, effective tillers m-2, ear length, and number of grains ear-1 etc. Regression and correlation analysis interpreted positive relation of grain yield with growth parameters and yield parameters. From the study it can be concluded that approximately 12 %, chemical fertilizers can be altered with biofertilizers and with this higher yield can be obtained then recommended dose of fertilizers.
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Desh Bhagat University,
Off to NH-44, Amloh Road, Mandi Gobindgarh,
District Fatehgarh Sahib, Punjab- 147301, India