Impact of different tillage methods on growth, development and productivity of maize (Zea mays)-wheat (Tritcum aestivum) cropping system
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Abstract
An experiment was conducted on a silty clay loam soil of Palampur during 2009–2011, to study the effect of different tillage methods in maize (Zea mays L.) wheat {Triticum aestivum (L.) emend. Fiori & Paol.} cropping system. Results revealed that in maize crop, tillage methods in kharif season resulted in significantly highest emergence count (27.1 plant/m2) under manual seed drill. While, multi-crop planter recorded in significantly taller plants (55.4 cm) at 30 DAS; higher dry matter accumulation 81.0, 990.0 and 4184.4 g/m2 at 30, 60 and 90 DAS, respectively and CGR (30.3 g/day/m2) at 30-60 DAS. Tillage methods in rabi season resulted in higher emergence count (17.6 plant/m2) under zero tillage. This treatment also recorded advanced emergence by 1.2 to 1.5 days. In wheat crop, tillage methods in kharif season resulted in significantly highest emergence count (307.6 plant/m2), taller plants (13.1 cm) at 30 DAS, dry matter accumulation (625.3 g/m2) at 120 DAS and CGR (14.4 g/day/m2) at 90-120 DAS under conventional tillage. While, tillage methods in rabi season resulted in significantly highest emergence count (369.5 plants/m2), tallest plants (17.7, 92.6 and 101.0 cm at 60, 120 and at harvest, respectively) with multi-crop planter. While, zero tillage recorded significantly higher CGR (15.8 g/day/m2) and RGR (0.027 g/g/day) during 120-harvest stage. Zero tillage produced statistically at par crop yield and rainwater-use efficiency of both crops with other tillage treatments. Hence, zero tillage can be as good as other intensive tillage system besides lower input cost and environmental security.
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CGR, Maize-wheat, Rainwater use efficiency, RGR, Zero tillage
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