• Muthukumararaja
• Sriramachandrasekharan

The experiment was conducted during kharif seasons of April-July in the year 2011 to study the response of zinc fertilization on rice yield and zinc fraction in to two soil (clay loam- Kondal series -Typic Haplusterts) and ( sandy clay loam - Padugai series-Typic Ustifluvents). The treatment consist with two factors viz., Factor A – Zinc levels (mg kg-1) Zn0 – 0, Zn1- 2.5,Zn2- 5.0 and Zn3- 7.5 and Factor B- Zinc sources S1 – Zinc sulfate (Zn – 21%),S2 – Zn-EDTA (Zn – 12%),S3 – Zn humate (Zn – 9%). The result of experiment revealed that Addition of 5.0 mg Zn kg-1 registered the highest grain yield (5556 and 5771 kg ha-1 ) and straw yield (7029 and 7120 kg ha-1 ) with per cent increase in grain yield due to Zn5.0 over Zn0 was 25.9 in Vertisol and 21.8 in Entisol, respectively. With respect to zinc sources, application of Zn through Zn-EDTA recorded the highest grain yield (5307, 5546 kg ha) and straw yield (6691 and 6913 kg ha-1) in Vertisol and Entisol respectively which was significantly superior to ZnSO4 and Zn-humate. The interaction effect between zinc sources and Zn level was significant. At all levels of zinc, Zn-EDTA registered significantly higher grain and straw yield over other two sources. The highest grain and straw yield was obtained when 5.0 mg Zn kg-1 was applied through Zn-EDTA (5732, 5946 kg ha-1) and (7234, 7302 kg ha-1) with per cent increase due to this treatments over control was 30.0 and 24.4 and 26.7 and 20.4 in Vertisol and Entisol respectively. All forms of zinc fractions increased with Zn levels and the highest was observed with 7.5 mg Zn kg-1 and it was significantly superior to rest of the levels.

Rice, Zinc, Zn-EDTA, Zn-Humate, zinc fractions.

"Effect of zinc fertilization on rice yield and chemical fraction in soil", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.405-414, June-2019, Available :http://www.jetir.org/papers/JETIR1906B63.pdf

"Effect of zinc fertilization on rice yield and chemical fraction in soil", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp405-414, June-2019, Available at : http://www.jetir.org/papers/JETIR1906B63.pdf