Role of Irrigation Regimes and City Waste Compost in Boosting Water Productivity, Root Density and Quality of Dissimilar Rice Varieties Beneath Climatic Condition of Varanasi

Globally rice is grown in about 150 million ha from which 497 million tonnes of rice produced annually. In Asia 90% of rice is production and consumed (Anonymous, 2015). India has the world’s largest area under rice with 43.1 million ha and is the second largest producer of paddy (104.32 million tonnes), (Anonymous 2018) next to China. Within the country, rice occupies one-fourth of the total cropped area, contributes about 40 to 43 percent of total food grain production and play a vital role in the national food and livelihood security system. In UP, rice is cultivated in an area of about 5.86 million hectares with a total production of 12.50 million tonnes of rice (Anonymous, 2018). By the year 2050, the world population will increasing rapidly and may reach 6.0 to 9.3 billion, whereas the crop production is decreasing rapidly due to the negative impact A field experiment was planned and carried out with entitled “Role of irrigation regimes and city waste compost in boosting water productivity, root density and quality of dissimilar rice varieties beneath climatic condition of Varanasi”for two successive years from 2017-18 to 2018-19 at Research farm of BHU, Varanasi. This experiment was carried out in splitplot design with three replications with the objective to study root density performance and water productivity under different water regimes, varieties and city waste compost. The result revealed that irrigation scheduling at 75 mm cumulative pan evaporation and Sahbhagi had produced significantly higher root density; among the nutrient treatments, MSW compost enriched with consortia was found distinctly superior over rest of the treatments in term of root density in addition to water productivity. K e y w o r d s