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Effect of Diatomaceous Earth as Silicon Source on Yield and Mineral Nutrition of Potato Priya R., Jegadeeswari V., Selvaraj N. Dept. of Vegetable Crops, Horticultural College and Research Institute, Tamil Nadu Agricultural University, Coimbatore Online published on 13 January, 2016. Abstract Field experiments were conducted to study the effect of Diatomaceous Earth (DE) as a silicon source (63.7% SiO2) on yield and mineral nutrition of potato (cv. Kufri Jyoti) in acid soils of Tamil Nadu, India. The treatments consisted of 150, 300 and 600 kg ha ’of DE alone and in combination with 100%, 75% and 50% Recommended Dose of Fertilizers (RDF-120: 240: 120 of N, P2O5 and K2O kg ha−1). The observations on yield attributes were recorded during harvest and on statistical analysis, the data were found significant. The treatment 75% RDF+DE @ 300 kg ha−1 recorded maximum number and weight of tubers per hill and tuber yield per hectare to the tune of 13.15, 598.00 g and 34.69 tonnes respectively. There was a significant difference among the treatments for dry matter production and it ranged from 1.36 t ha−1 to 3.40t ha−1. The increased dry weight could be attributed to better vegetative growth and also more of fresh weight. Soil application of silicon increased N, P, K and Si concentrations in the haulms and tubers of potato. Total uptake of silica by potato haulms and tubers significantly increased which might be due to application of different levels of DE. The total uptake of silica ranged from 3.29 kg ha−1 to 15.34 kg ha−1 in haulms and 4.34 kg ha−1 to 19.23 kg ha−1 in tubers. This is attributed to better supply of essential nutrients and available silicon from native and supplied sources to potato. It can be concluded that application of 75% RDF + DE @ 300 kg ha ’to potato is beneficial for sustainable production. Top Keywords Diatomaceous Earth, silicon, yield, mineral nutrition. Top | |
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