Murumkar, P.R.RATHOD, ASHWINI DAYARAM.2019-10-032019-10-032019-09-06RATHOD, ASHWINI DAYARAM (2019). Modification and performance evaluation of hydroponic structure with nutrient film technique for spinach. Department of Agricultural Structures and Environment Management. Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola. M. Tech. 2019.Print. xiii, 91p.http://krishikosh.egranth.ac.in/handle/1/5810130208The four green, white, uv-polyethylene and open field hydroponic structure with nutrient film technique were design and modified. A field experiment was conducted to study the growth and quality of spinach under controlled atmosphere of hydroponic structure at Department of Farm Structure, Dr. PDKV, Akola during February 2019- April 2019. The experiment was laid out in randomized block design and by using opi-state statistical software to analyze biometric characteristics and quality parameters respectively.A field experiment was conducted to study the growth and quality of spinach under controlled atmosphere of hydroponic structure at Instructional Farm Department of Farm Structure, Dr. PDKV, Akola during February, 2019 – April, 2019. The experiment was laid out in randomized block design. The structure was 1400 mm long and 970 mm wide and at a height of 1800 mm, OPI STAT statistical software was used for analyse biometric characteristics and quality parameters respectively. The study indicated that the temperature, relative humidity, light intensity and CO2 inside the green hydroponic structure was favourable for the growth of spinach in the summer season. Green hydroponic structure showed better results followed by white and uv-polyethylene hydroponic structure. However, temperature inside the white and uv-polyethylene hydroponic structure was 1-30C greater and also light intensity found maximum. Biometric characteristics of spinach like plant height, number of leaves and stem diameter was found maximum in green, white and uv-polyethylene hydroponic structure than open field. The yield was found maximum inside the green hydroponic structure. Yield on the open field was found 2 times less as compare to the green, white and uv-polyethylene hydroponic structure. Quality of spinach on the basis of moisture content, iron content, chlorophyll content, and yield was found maximum in green followed by white and uv- polyethylene hydroponic structures. Also during summer season, when temperature was high under controlled atmosphere, better quality spinach was obtained. The total cost required for estabilishing of hydroponic structure was Rs. 50,338/-ennullThesis