Effect of Drip Irrigation and Fertilization Timing and Rate on Yield of Onion

Imtiyaz

Irrigation and Drainage

2008

Field investigations were carried out for 3 years with the aim of studying the feasibility of using microsprinkler and drip irrigation systems for vegetable production in a canal command area. These systems were compared with the existing flood irrigation method for onion production with four irrigation levels, viz. 0.60, 0.80, 1.00 and 1.20 of irrigation water to cumulative pan evaporation ratio (IW/CPE). Microsprinkler and drip irrigation systems were also compared with fertigation rate of 100 (50:25:25 NPK), 150 (75:37.5:37.5 NPK) and 200 (100: 50: 50 NPK) kg ha À1 . Microirrigation systems resulted in higher onion yield and greater profitability than surface irrigation at each irrigation schedule. However, microsprinklers indicated better economics than a drip irrigation system. Microsprinkler, drip and surface irrigation system with 1.20 IW/CPE of irrigation produced maximum crop yields of 34.34, 33.10 and 22.57 t ha À1 , respectively. Increased crop yield with microsprinkler and drip irrigation is the factor behind higher profitability than existing surface irrigation. Reduction in nutrient application by 25% in fertigation from the dose of flood irrigation did not reduce yield and net returns significantly. But net return was significantly higher in microsprinkler (Rs 67 334 ha À1 ) than drip (Rs 59 930 ha À1 ) fertigation. The overall results of the present study favoured microsprinkler over existing irrigation methods for onion production in a canal command area with higher profit under limited available surface water. Copyright # 2008 John Wiley & Sons, Ltd. significative. Mais les revenus nets ont été significativement plus élevés avec la fertigation par micro-arroseur (Rs 67 334 ha À1 ) que par goutte à goutte (Rs 59 930 ha À1 ). Au total les résultats de la présente étude montrent l'intérêt des micro-arroseurs par rapport à la méthode existante pour la production d'oignon avec meilleur profit dans des conditions de rareté de l'eau de surface.

Section: Resultssupporting

confidence: 93%

Studying the feasibility of using microirrigation systems for vegetable production in a canal command area

Imtiyaz

Irrigation and Drainage

2008

Journal of Plant Nutrition

“…In fertigation, nutrients are applied through emitters directly into the zone of maximum root activity and consequently fertilizer-use efficiency can be improved over conventional method of fertilizer application. Some studies have been published (Mohanti and Das, 2001;Patel and Rajput, 2005;Rumple, 2003;Savitha et al, 2010;Selvaraj, 1993;Yadav et al, 2003). Although few studies also reported the suitability of drip fertigation for improving onion seed productivity under semi arid climatic conditions of India (Bhakare et al, 2008;Dingre et al, 2012b).…”

Section: Introductionmentioning

confidence: 99%

Onion seed productivity, nutrient use, and quality response to drip fertigation in semi-arid India

Dingre

Pawar

Kale

et al. 2016

Crop productivity and nutrient use are mainly water restricted in semiarid regions. This study was conducted to find out whether the onion seed crop productivity could be elevated through drip fertigation. The effects of irrigation and fertigation levels on yield, yield components, quality and nutrient use of onion seed crop (Allium cepa L.) were investigated at MPKV Rahuri, western India on a sandy clay loam soil. Irrigation water applied at evapotranspiration (ETc) levels of 80% (I 1 ), 90% (I 2 ) and 100% (I 3 ) whereas, drip fertigation levels 60 %, 80 %, 100 % and 120 % of recommended dose (120:60:60 nitrogen, phosphorus, potassium (NPK )kg/ha) were investigated. Three-year experiment results showed no significant differences in number of seed/umbel, seed yield/umbel /plant, seed and straw yield ha −1 from the comparison between 100 % ETc and 90 % ETc. In fertigation, 120 and 100 % levels gave significantly higher values of yield components and seed yield than the 80 % and 60 % levels. The quality parameters were decreased with decrease in ETc, but, increased with increase in fertigation levels. Fertilizer use efficiency was highest in 60 % fertigation and then declined with the increase in fertigation levels. Irrigation at 100 % ETc and fertigation @ 120 % resulted into higher nutrient use but the Downloaded by [Nanyang Technological University] at 15:03 14 June 2016 ACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT2 difference with 90 % ETc and 100 % fertigation was non significant. The 90 % ETc and 100 % fertigation dose (120:60:60 NPK kg/ha) appears a useful practice to increase onion seed productivity under the semi arid climate of western India.

“…The increased curd yield with drip irrigation at 1.0 ETc and 0.8 ETc over surface irrigation might be attributed to the enhanced water utilization as a result of better distribution of water in the active root zone of broccoli due to constant maintenance of soil water near to field capacity in low suction [ 36 ], increased availability and concomitant uptake of nutrients by plant throughout the growing period [ 37 ] and excellent soil water-air balance with plenty oxygen concentration in the rhizosphere [ 17 ]. All these contributory factors might have stimulated enhanced physiological processes, active cell division and photosynthetic activities of plants [ 13 ].…”

Section: Discussionmentioning

confidence: 99%

Crop and water productivity and profitability of broccoli (Brassica oleracea L. var. italica) under gravity drip irrigation with mulching condition in a humid sub-tropical climate

et al. 2022

Strategic irrigation planning and soil water conservation measure can be rewarding for increasing agricultural productivity in a humid subtropical climatic environment. Field experiments were conducted to evaluate broccoli yield response to crop water productivity (CWP), irrigation water productivity (IWP) and economics under varied irrigation regimes and mulching. Four levels of irrigation: surface irrigation at 1.0 IW/CPE (irrigation water to cumulative pan evaporation, I1), drip irrigation at 0.6 (I2), 0.8 (I3) and 1.0 (I4) of crop evapotranspiration (ETc) and three mulches: none (M0), black polythene mulch (BPM, M1) and paddy straw mulch (PSM, M2) were examined. Among these treatments I3M1 produced the higher yield (19.17 t ha-1), CWP, IWP and maximum benefit-cost ratio (BCR), being almost competitive with I3M1. Under scarcity of water, I2M1 was an alternative. Drip irrigation could save 21.2–52.7% water over surface irrigation which accommodated 17.1 to 53.3% additional area under irrigation. Yield response factor and water-yield production function suggested the potential yield decrease in relation to increased deficit irrigation. However, a deficit drip irrigation scheduling with 0.8 ETc at a 3-day interval is optimum for increased curd yield, water productivity and economics of broccoli.