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Subject: Agronomy × Author: Ajamirali × End date: 2016 × Start date: 2014 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Effect of Scheduling Irrigation and Mulching on Growth and Yield of Maize (Zea mays L.)
    (University of Agricultural Science, Dharwad, 2016-06) Ajamirali; Halagalimath, S.P.
    A field experiment was conducted at the Irrigation Water Management Research Center, Belvatagi, UAS, Dharwad during rabi 2015-16. The experiment was laid out in split plot design with four replications. The main plots comprised of three irrigation levels (0.4, 0.6 and 0.8 IW/CPE ratio) and sub plots three mulching treatments [wheat straw at 5 t/ha, sunnhemp brown manuring (one row) and sunnhemp brown manuring (two rows)] along with two control plots (weed free and weedy check). The results revealed that plant height (199.13 cm), leaf area (33.97 dm2/plant) and above ground dry matter accumulation (240.87 g/plant) was recorded higher with irrigation scheduled at 0.8 IW/CPE ratio. However, grain yield (78.66 q/ha) was recorded higher in irrigation scheduled at 0.8 IW/ CPE ratio followed by irrigation scheduled at 0.6 IW/CPE ratio (62.27 q/ha). Among the mulches, wheat straw mulching at 5 t/ha recorded significantly higher grain yield (66.28 q/ha) over control treatments and was on par with sunnhemp brown manuring (two rows) (64.27 q/ha). Combination of 0.8 IW/CPE ratio with wheat straw mulching at 5 t/ha recorded higher grain yield (80.85 q/ha) and was on par with combination of 0.8 IW/CPE ratio and sunnhemp brown manuring (two rows) (78.09 q/ha). Significantly higher WUE (24.92 kg/ha.mm) was recorded with wheat straw mulching at 5 t/ha and was on par with sunnhemp brown manuring (two rows) (24.36 kg/ha.mm). Mulches recorded lower weed dry weight over no mulch. The highest weed control efficiency of 77.97 per cent was recorded in sunnhemp brown manuring (two rows). Irrigation scheduled at 0.8 IW/CPE ratio and mulching with wheat straw recorded higher gross returns (` 1,20,007/ha) and net return (` 91,599/ha). Significantly higher B:C ratio (4.25) was obtained with treatment combination of 0.8 IW/CPE ratio with sunnhemp brown manuring (one row).