Volume No. 9 Issue No.: 3A Page No.: 779-786 January-March 2015

 

EFFECT OF DIFFERENT ORGANIC WASTES ON PHYS ICAL AND CHEMICAL PROPERTIES OF DEGRADED LANDS AND ON GROWTH OF FOREST TREE SPECIES

 

Reddy Prabhakara G. V.1, Srinivasamurthy C. A.2, Vasanthi B. G. *3 and Nagaraja M. S.4

1. NOKIA L and C, Bangalore, Karnataka (INDIA) 2. Department of Soil Science and Agricultural Chemistry, G. K. V. K., University of Agricultural Sciences, Bangalore, Karnataka (INDIA) 3. Krishi Vigyan Kendra, Hadonahalli, Bangalore, Karnataka (INDIA) 4. Department of Soil Science and Agriculture Chemistry, University of Horticultural Sciences, Bagalakote, Karnataka (INDIA)

 

Received on : September 10, 2014

 

ABSTRACT

 

Physically degraded lands are commonly characterized with high gravelliness and low nutrient status resulting in scattered vegetation. Thus external supplementation of nutrients is essential for successful vegetation establishment. On the other hand, uncontrolled, urbanization and industrial expansion is generating large quantity of organic wastes sludges which provides an opportunity to utilize them as nutrient sources for establishment of vegetation in wastelands. An attempt has been made to utilize the nutrient rich industrial and domestic organic wastes for efficient reclamation of degraded lands in several afforestation programs in Eastern dry zone of Karnataka, India. Organic wastes from sugar mill, paper mill, distillery industry and municipal sludges were used for wasteland reclamation. Thus they were analyzed for nutrient status and applied at 1% and 2% on soil weight basis. Forest tree species namely Pterocarpus marsupium, Melia dubia, Azadirachta indica, Pongamia pinnata and Holoptelea integrifolia were planted in trenches. Soil properties and growth parameters were monitored for 2 years. The plant growth significantly varied with organic wastes and their levels. The growth was influenced by the wastes in the order of distillery sludge, municipal sludge, sugar mill sludge , FYM, paper mill sludge control. Growth rates increased with higher rate of applications. Similarly soil physical and chemical nutrient status was significantly influenced by the organic waste types and their levels, the increase was maximum in distillery and municipal sludge treated plots. The results suggested that the organic wastes can be effectively used for wasteland reclamation

 

Keywords : Degraded lands, Organic wastes, Tree species, Soil fertility, Municipal sludge

 

 

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