Impact of Field Water Tube based Irrigation and Split Application of Nutrients on Yield and Water Productivity (Oryza sativa L.)

Abstract

A field experiment was conducted at Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore during Navarai season (December-April) of 2021-22 to study the influence of field water tube and split nutrient application on yield and water productivity in transplanted rice (Oryza sativa L.). The field experiment was laid out in randomized complete block design having seven treatments and replicated thrice.  The treatment details viz., T1 – Control (conventional planting 100% Recommended Dose of Fertilizer (RDF), T2 – Alternate wetting and drying + Leaf Colour Chart (LCC) based nitrogen management, T3 – Alternate wetting and drying with automated field water tube + 100% RDF, T4 – Irrigation through field water tube + 100% N & K application in 7 days intervals, T5 – Irrigation through field water tube  + 100% N & K application in 10 days intervals, T6 – Irrigation through field water tube  + 75 % N & K application in 7 days intervals, T7 –  Irrigation through field water tube  + 75% N & K application in 10 days intervals. Experimental results shows that significantly more yield was recorded in T5 which was on par with all other treatments expect conventional method. Among the irrigation treatments T5 recorded a higher grain yield of 6587 kg ha-1 and which was on par with T6 (6307 kg ha-1). Hence, this study revealed that the Irrigation through field water tube with 75% N& K application in 7 days intervals confer 34.7 % water saving and better results in yield attributes in transplanted low land rice.