ESTIMATION OF WATER REQUIREMENT OF CAPSICUM CROP GROWN UNDER SHADE NET HOUSE AND INSECT NET HOUSE

C. SHUKLA¹, S.R. BHAKAR², S.K. ACHARYA³*
¹Indian Institute of Technology, Kharagpur, 721302, West Bengal, India
²Professor, College of Technology & Engineering, Maharana Pratap University of Agriculture and Technology, Udaipur, 313001, Rajasthan, India
³College of Horticulture, Jagudan, 382710, Sardarkrushinagar Dantiwada Agricultural University, Sardarkrushinagar, 385506, Gujarat, India
* Corresponding Author : sanjay.acharyahort@gmail.com

Received : 30-10-2018     Accepted : 12-11-2018     Published : 15-11-2018
Volume : 10     Issue : 21       Pages : 7436 - 7440
Int J Agr Sci 10.21 (2018):7436-7440

Keywords : Capsicum, Reference Evapotranspiration, Crop Evapotranspiration, Shade Net House, Insect Net House, Irrigation Schedule
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to College of Technology & Engineering, Maharana Pratap University of Agriculture and Technology, Udaipur, 313001, Rajasthan, India.
Author Contribution : All authors equally contributed

Crop water requirement is the amount of water used by a crop for growth and development. Crop water use can be determined on a daily, weekly or growing season basis. The objective of this study was to determine the crop water requirement, to develop irrigation schedule for capsicum (Capsicum annuum L.) under shade net house and insect net house and to find out best suitable protected structure type by comparing both of these structures on the basis of water saving and yield obtained. The field study was conducted at plasticulture farm of Soil and Water Engineering, C.T.A.E., Udaipur. The duration of crop was 168 days from January to July. Both of these structures were of same size 64 m2 (16×4 mm) area. Shade net house was fully covered with 75% shade net, and insect net hose is fully covered with 40 mesh insect net. All the treatment including irrigation kept identical for both the structures during the crop period. Amount of irrigation was supplied based on the estimation by FAO 56 method using last 5 year i.e., 2008 to 2012, climatic data, collected from metrological observatory CTAE Udaipur. It was found 800.84 mm or 51254.31 L during entire crop period. Gravity fed drip irrigation method was adopted to minimize the overall cost of the technology. A 1000 L tank was kept at a height on 1.5 m bamboo stand for getting required pressure and uniformity of irrigation. For the convenience of measurement, total irrigation was done in 51 instalments i.e. 1000 L each time. Crop evapotranspiration was determined by soil moisture balance method. It was estimated as 527.04 mm in shade net house and 638.81 mm in insect net house. The crop water requirement for outside condition was calculated by FAO 56 method. On the basis of estimated water requirements inside both structures, an irrigation schedule is suggested for each structure and outside condition. It was found that shade net house minimized crop evapotranspiration by 33.43 % as compared to outside crop evapotranspiration.

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