Thumbnail Image

Thesis

Browse

20131
Reset filters
Subject: Crop Physiology × Author: D. Saida Naik × Start date: 2010 × Type: Thesis × Thesis Type: Ph.D ×
Reset filters

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    ThesisItemOpen Access
    Studies on physiological and biochemical changes during long term storage of paddy and rice under different packaging materials
    (UAS Dharwad, 2013) D. Saida Naik; M. B. Chetti
    Investigations were undertaken to study the physiological and biochemical changes during long term storage of paddy and rice under different packaging materials at the Department of Crop Physiology, College of Agriculture, University of Agricultural Sciences, Dharwad over a period of 18 months from February, 2011 to August, 2013. The research study consisted of two experiments with eight treatments comprising packing of seeds with different packaging materials viz., vacuum packed, , polythene, cloth and gunny bags stored at room temperature (25±2º C) and cold storage (4±1º C) for a period of 18 months. The observations recorded at bi-monthly intervals revealed that the seeds stored in vacuum packed bags maintained the quality with least deterioration compared to gunny and cloth bags. The seed quality parameters viz., germination per cent, root length, shoot length, total seedling length, seedling dry weight, seedling vigour index, mean daily germination and mobilization efficiency were very high in vacuum packed bags compared to gunny bags throughout the storage period of 18 months under both ambient and cold storage. Electrical conductivity values were lowest in vacuum packed bags compared to polythene, gunny and cloth bags. The rate of absorbance of moisture content was more in gunny and cloth bags, while vacuum packed bags maintained constant moisture content. The activities of enzymes viz., a- amylase, lipase, protease and peroxidase were slightly less in vacuum packed bags compared to gunny and cloth bags in both paddy and rice grains. Mineral contents viz., copper, zinc, iron and manganese decreased with advancement in storage period and higher in vacuum packed seeds over all other treatments in both paddy and rice grains. Among the storage conditions, cold storage recorded better seed quality, physiological and biochemical parameters over room temperature, irrespective of the storage containers throughout the storage period of 18 months.