Vol. 9, Issue 2 (2020)

Author(s):
S Chandrasoorian, NS Venkataraman, R Babu and S Thiyageshwari

Abstract:
Field experiments were conducted during samba seasons of 2017-18 and 2018-19 at Madurai, Tamil nadu to find out the effect of organic and inorganic nutrients on growth and yield of Seeragasamba rice (local land race). Fourteen treatments were replicated thrice in a randomized block design. The treatments are as follows: T₁- 100%N through Green Manure, T₂-75%N through Green Manure+25%N through RDF, T₃ - 50%N through Green Manure+50% N through RDF, T₄ -100%N through FYM, T₅-75% N through FYM+25% N through RDF, T₆-50% N through FYM+50% N through RDF, T₇-100% N through Composted Poultry Manure, T₈-75%N through Composted Poultry Manure+25%N through RDF, T₉-50% N through Composted Poultry Manure+50%N through RDF, T₁₀-100%N through Vermicomposted Pressmud, T₁₁- 75% N through Vermicomposted Pressmud+25% N through RDF, T₁₂-50% N through Vermicomposted Pressmud+50% N, T₁₃-RDF @ 56:37:37 NPK Kg/ha through inorganic and T₁₄ - Control (No Nitrogen). The results revealed that the application of 50% N through green manure + 50% N through RDF recorded the highest grain yield of 4573 kg/ha 2017-18 and 4619 kg/ha in 2018-19 experiments. It was followed by T₁₂ viz. application of 50% N through vermi composted pressmud + 50% N through RDF which registered the grain yield of 4436 kg/ha in 2017-18 and 4481 kg/ha in 2018-19. These two treatments were found to be significantly superior to the rest of the treatments. However, T₃ and T₁₂ were found to be on par not only in yield but also in other growth and yield components. Similarly T₃ and T₁₂ were recorded significantly higher B:C ratio of 1.86 and 1.84 in 2017-18, 1.88 and 1.85 in 2018-19 respectively.