Alternate wetting and drying (Pani pipe) irrigation (AWDI) and green manuring technique for sustainable rice production Dhanushkodi V1,*, Nageswari R1, Hanif Noorjehan Aka2, Sangeetha S3, Anitha R1, Krishnaveni A4 1Anbil Dharmalingam Agricultural College and Research Institute, TNAU, Tiruchirappalli, 620027, Tamil Nadu, India 2Agricultural College and Research Institute, TNAU, Karur, 639001, Tamil Nadu, India 3Horticultural College and Research Institute for Women, Tiruchirappalli, 620027, Tamil Nadu, India 4Agricultural College and Research Institute, TNAU, Vazhavachanur, Thiruvannamalai, 606753, Tamil Nadu, India *Email for correspondence: dhanushselgi@yahoo.com.au
Online Published on 26 October, 2023. Abstract A study was conducted in Karaipottanar sub-basin area of Namakkal district of Tamil Nadu in rice crop in 35.0 ha (25 demonstrations). The results showed that the adoption of alternate wetting and drying irrigation (AWDI) and green manure technique resulted in higher grain yield as compared to farmers’ practice. The net return (Rs 39,208.30/ ha) and B-C ratio (2.10) were observed in demonstration plots which were higher than farmers’ practice (Rs 28,569.40/ha and 1.74 respectively). The water productivity was higher (5.14 kg/m3) in demonstration plots as compared to the control plots (3.37 kg/m3) and the average water saving was 26 per cent in demonstration plots. The green manure application resulted in increased available nutrients like organic carbon, nitrogen, phosphorus and potassium content in the soil. From this study it was concluded that AWDI with field water tube was the better water management technique not only in increasing rice yield but also in saving water. Top Keywords Rice, AWDI, Pani Pipe, Green manure, Water saving, Yield, Soil nutrients. Top |