Productivity of soybean [Glycine max (L.) Merrill] as influenced by drip irrigation, fertigation and mulching
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Date
2018
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Punjab Agricultural University, Ludhiana
Abstract
The present study entitled, “Productivity of soybean [Glycine max (l.) Merill] as influenced by drip irrigation, fertigation and mulching” was conducted during the Kharif season of 2017 at research farm, Department of Soil and Water Engineering, Punjab Agricultural University, Ludhiana and University Seed Farm, Ladhowal to study the effect of drip irrigation, fertigation and mulching on productivity of soybean. The soil of the experimental field was sandy loam and loamy sand at Ludhiana and Ladhowal, respectively. At both the sites, soil was low in organic carbon, available nitrogen, medium in available phosphorous and potassium. The treatments included three levels of drip irrigation (100% ETc, 80% ETc and 60% ETc) and three fertigation levels 50, 75 and 100% RDF and two levels of mulch i.e. no mulch and paddy straw mulch @ 6 tonne ha-1 and control plot (conventional furrow irrigation with RDF). The experiment was laid in randomized complete block design with three replications. Among drip irrigation levels seed yield was significantly increased to the tune of 14.2 and 11.8 per cent with increasing drip irrigation level from 60% ETc to 80% ETc for Ludhiana and Ladhowal, respectively. However, further increase in irrigation level up to 100% ETc increased the seed yield marginally by 3.5 and 4.6 per cent for respective locations. With increasing fertigation level from 50% to 75% RDF seed yield was significantly increased to the tune of 9.2 and 9.4 per cent for Ludhiana and Ladhowal, respectively. However, further increase up to 100% RDF increased the seed yield by 4.8 and 5.3 per cent for respective locations. Application of paddy straw mulch resulted in 13.0 and 9.8 per cent increase in seed yield over no mulch. Mean of all combinations of drip irrigation, fertigation and mulching treatments recorded 12.3 and 19.2 per cent increase in yield as compared to conventional furrow irrigation (control) for Ludhiana and Ladhowal respectively. The quality parameters like oil content, protein content and oil yield were significantly influenced by drip irrigation, fertigation and mulching at both the locations.
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