Vol. 9 (1) : January-February 2018 issue
Green Farming Vol. 9 (1) : 51-55 ; January-February, 2018
Problems of iron and aluminium toxicity on rice (Oryza sativa L.) in saline hydromorphic soils of Kaipad
SANTHI G.R.1*, N.K. BINITHA2, P.R. SURESH3 and ASHIQUE T.K.4
Department of Soil Science & Agricultural Chemistry, College of Agriculture, Kerala Agricultural University, Padannakkad, Kasaragod - 671 314 (Kerala)
1P.G. Student *(firstname.lastname@example.org), 2Asstt. Professor, 3Professor & Head, 4Teaching Asstt.
Subject : Soil Science & Agric. Chemistry; Soil Health & Soil Conservation Engg.
Paper No. : P-6969
Total Pages : 5
Received : 09 September 2017
Revised accepted : 16 January 2018
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SANTHI G.R., N.K. BINITHA, P.R. SURESH and ASHIQUE T.K. 2018. Problems of iron and aluminium toxicity on rice (Oryza sativa L.) in saline hydromorphic soils of Kaipad. Green Farming Vol. 9 (1) : 51-55 ; January-February, 2018
An investigation to examine amelioration strategies for iron and aluminium toxicity on rice (Oryza sativa L.) in saline hydromorphic soils of Kaipad was carried out at College of Agriculture, Padannakkad during the academic year 2015 to 2017. The pot culture experiment was laid out in CRD using the rice varieties Ezhome-1 and Kuthiru with seven treatments in the soil sample collected from Punnachery (Kannur) having the GPS coordinates 12? 017'. 78" N and 75? 17' 19".85 E. The treatments were: Lime (T1); Magnesium sulphate + ½ lime (T2); Phosphogypsum + ½ lime (T3); Lime + potassium silicate 0.25% + 0.25% boron (T4); Magnesium sulphate + ½ lime + potassium silicate 0.25% + 0.25% boron (T5); Phosphogypsum + ½ lime + potassium silicate 0.25% + 0.25% boron (T6) and absolute control (T7). A remarkable influence of treatments was observed in reducing iron and aluminium toxicity and also in the growth and yield attributes. The number of productive tillers/ number of panicles, grain yield, chaffiness percentage, 1000 grain weight and straw yield was significantly superior in Ezhome-1. Among the amendments, T6 recorded significantly superior grain yield, total Ca, and lowest Al content in rice. The treatment T3 recorded maximum significant number of panicles/ productive tillers, number of grains per panicle, 1000 grain weight, straw yield and lowest Na and Fe content in plant tissue. The chaffiness percentage was lowest on application of lime. The treatments receiving phosphogypsum + ½ lime (T3 and T6) were highly effective in reducing the toxic levels of available Fe and Al whereas, application of lime (T4) was significantly superior in increasing the soil pH, available P and reducing the EC and exchangeable sodium status of Kaipad soil.
Key words :
Aluminium toxicity, Iron toxicity, Kaipad, Rice, Saline hydromorphic soil.