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20191
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Subject: Agronomy × Author: Agrawal, Aditi × End date: 2021 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Studies on check basin and sprinkler irrigation scheduling in flat and raised bed sown chickpea (Cicer arietinum L.) in sandy loam soil
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2019-06) Agrawal, Aditi; Subhash Chandra
    A field experiment was conducted at the Norman E. Borlaug Crop Research Centre of G. B. Pant University of Agriculture and Technology, Pantnagar during rabi season of 2017-18 to study the performance of check basin and sprinkler irrigation scheduling in flat and raised bed sown chickpea. The soil was sandy loam in texture having neutral pH 7.02, high organic carbon (0.85 %), low available nitrogen (218.5 kg/ha), high phosphorus (24.2 %) and medium potassium (182.5 kg/ha). The FC and PWP of soil were 18.5 and 6.4%, respectively. During crop season, only 13.6 mm rainfall was received. The experiment was laid out in factorial RBD with 3 replications. The treatments consisted of two land configurations (flat and raised bed), two irrigation methods (check basin and sprinkler irrigation) and three irrigation schedules (vegetative, pod development and both stages). Plant height, branches/plant, lateral spread of canopy, total plant dry matter accumulation, root length at 90 DAS, root dry matter accumulation/plant, nodule count, no. of pods/plant, grain weight/plant, grain, straw and biological yields, harvest index, N, P and K uptake, protein yield, gross and net returns and B:C ratio did not differ significantly due to land configurations. However, raised bed recorded significantly higher root length at 50 DAS and lower bulk density at harvest as compared to flat bed. The consumptive water use was lower but water use efficiency was higher in raised bed (155.6 mm and 78.2 kg/ha-cm, respectively) as compared to flat bed (157.2 mm and 76.6 kg/ha-cm, respectively). Sprinkler irrigation method recorded significantly higher values of growth attributes (plant height, branches/plant, lateral spread, total dry matter accumulation/plant, root dry matter& nodule count), yield attributes (pods/plant, 100-grain weight and grain weight/plant), grain, straw and biological yields, HI and uptake of N, P and K, protein yield, gross and net returns and B:C ratio as compared to check basin irrigation. There was no significant difference in root length but bulk density at harvest was significantly lower in sprinkler irrigation as compared to check basin irrigation. Consumptive water use was lower but water use efficiency was higher in sprinkler irrigation (150.0 mm and 86.4 kg/ha-cm, respectively) than check basin irrigation (162.8 mm and 69.1 kg/ha-cm, respectively). Combinations of sprinkler irrigation method and flat bed sowing produced the highest grain yield (1325 kg/ha). Under check basin irrigation raised bed produced 7.8% higher grain yield than flat sowing (1083 kg/ha). Two irrigations at vegetative and pod development stages recorded significantly higher plant height, branches/plant, total dry matter accumulation/plant, pod/plant, grain weight/plant, grain and biological yield, harvest index, uptake of N, P and K, protein yield, gross and net returns and B:C ratio as compared to single irrigation at either stage. Root length, nodule count, 100-grain weight did not differ significantly among irrigation schedules. Single irrigation at vegetative stage recorded lowest consumptive use and highest water use efficiency (140.8 mm and 82.4 kg/ha-cm, respectively).