Economic Evaluation of Multi Purpose Tree Species in Degraded Lands of Karnataka
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IJ International Journal of Forestry and Crop Improvement FC I Volume 7 | Issue 1 | June, 2016 | 35-40 | Visit us : www.researchjournal.co.in e ISSN-2230-9411 RESEARCH ARTICLE DOI: 10.15740/HAS/IJFCI/7.1/35-40 Economic evaluation of multi purpose tree species in degraded lands of Karnataka S.M. MUTANAL, H.Y. PATIL AND M.V. MOKASHI ABSTRACT : A field experiment was conducted to know the economically viable trees on degraded lands at MARS, UAS, Dharwad under rainfed conditions. Nine trees viz., Eucalyptus tereticornis, Tectona grandis, Dalbergia sissoo, Anogeissus latifolia, Albizia lebbeck, Grevillea robusta, Hardwickia binnata, Acacia nilitica and Azadirachta indica were planted at 2 x 2m with three replications in Randomized Block Design. Among the tree species, total biomass was higher in Albizia lebbeck followed by Eucalyptus tereticornis and Grevillea robusta. Soil physical properties like bulk density significantly decreased in Dalbergia sissoo, Anogeissus latifolia, Albizia lebbeck and Hardwickia binnata. Trees have reduced pH of soil compared to open conditions. The available nitrogen, phosphorus and potassium were higher in soil grown with tree canopy of Albizia lebbeck, Hardwickia binnata and Tectona grandis, respectively. The gross return, B : C ratio and IRR were higher in Tectona grandis (Rs. 31,647/ha/yr, 4.71 and 22 %, respectively) followed by Eucalyptus tereticornis (Rs. 22,547/ha/yr, 3.52 and 21 %, respectively) as compared to other tree species. KEY WORDS : Degraded lands, Economical, Viability, Biomass, Soil physical properties HOW TO CITE THIS ARTICLE : Mutanal, S.M., Patil, H.Y. and Mokashi, M.V. (2016). Economic evaluation of multi purpose tree species in degraded lands of Karnataka. Internat. J. Forestry & Crop Improv., 7 (1) : 35-40, DOI: 10.15740/HAS/IJFCI/7.1/35-40. ARTICLE CHRONICAL : Received : 09.02.2016; Revised : 08.04.2016; Accepted : 09.05.2016 the real challenge before the scientists.Growing stock of NTRODUCTION I 4740 million m3 with average volume of 74.42 m3ha-1 is Increasing human population with soaring demands also far behind the world’s average of 110 m3ha-1. Low for material goods in the present scenario is causing per capita forest availability (0.07 ha) and widening gap unprecedented demand for forest resources. India too, between demand and supply of basic needs of rural is encountered with scarcity of forest resources as well inhabitants necessitates to devise strategies to overcome as several concomitant environmental disasters which is these problems. There is acute shortage of fuel wood, fodder, timber MEMBERS OF RESEARCH FORUM and other tree-based products, plantation forestry has a Address of the Correspondence : S.M. MUTANAL, All India Co-ordinated Research tremendous scope in India. Tree planting will need Project on Agroforestry, University of Agricultural Sciences, DHARWAD (KARNATAKA) considerable attention in view of the vital and permanent INDIA Email: [email protected] requirements met by trees. A multipurpose tree Address of the Coopted Authors : H.Y. PATIL AND M.V. MOKASHI, All India Co- ordinated Research Project on Agroforestry, University of Agricultural Sciences, deliberately grown and managed for more than one output DHARWAD (KARNATAKA) INDIA has a greater impact on a farmer’s well being. HIND AGRICULTURAL RESEARCH AND TRAINING INSTITUTE S. M. MUTANAL, H.Y. PATIL AND M.V. MOKASHI Multipurpose trees should be capable of producing EXPERIMENTAL METHODS a wide range of products and have the capacity to contribute in its specific functions towards the An experiment involving nine tree special viz., sustainability of yields, an increase in output and/or Eucalyptus tereticornis, Tectona grandis, Dalbergia reduction in inputs, and maintaining the ecological sissoo, Anogeissus latifolia, Albizia lebbeck, Grevillea stability of the region (Hegde and Daniel, 1994). robusta, Hardwickia binnata, Acacia nilitica and Several problems are encountered in afforestation Azadirachta indica were planted on red gravelly soil at of highly degraded lands due to limitations of species Main Agricultural Research Station, University of suitability, soil depth, moisture and thermal stress, nutrient Agricultural Sciences, Dharwad under rainfed conditions. deficiency etc. The basic aim of planting tree species is The soil of the study area belong to degraded red soils to rehabilitate highly eroded areas, check soil and water with pH of 6.4 and N:P:K 172, 18.6 and 164.7 kg ha-1, losses and improve the degraded lands to provide fuel respectively. One year old nursery grown seedlings of wood, fodder and timber to the poor famers (Singh et these trees species were planted at a spacing of 2 x 2m. al., 2009). The experiment was laid out in Randomized Block Design The term degraded lands evokes images of barren, with three replications. The general climate of the area desert plains with heavy winds or of severely eroded is tropical and lies in northern transitional zone of lands. These lands often associated with these lands are Karnataka. The mean annual rainfall of the location is steep slopes, lack of fertility, salinity, soil acidity, eroded 783.6 mm which was received in 57.5 days (average of soils, stoniness, shalow soils, wetness or flooding. Soil 43 years) rainy days. The mean annual maximum with these constraints are often called problem soils and temperature raised from 37.80C to 27.0C and annual which can be managed (Dudal, 1980). minimum temperature varied from 14.50C to 21.60C. At Multipurpose trees have positive influence on the end of 20 years, sample trees were felled and biomass yields from these degraded lands. The trees can productivity in different part of tree species was assessed greatly reduce fossil fuel requirements for agricultural and presented. Based on the market rates of fuel and production and extend the use of fragile environments timber, and also the additional income contributed by each and marginal lands. Generally, multipurpose tree tree species was accounted for the total mean of the species can be used for meeting various social, economic evaluation was made. environmental and industrial needs. Industries should Soil samples were collected at 0-30 cm depth from provide support with inputs including credit, regular 5 random locations at 1 m away from the main trunk for technical advice, harvesting and transport services. each species. The soil samples from each treatment The farmer thus have a choice in selecting species bulked thoroughly mixed and a composite sample taken depending upon the merits of the alternatives available for analysis. Soils were analyzed for bulk density, particle to them (Hegde and Daniel, 1994). density porosity, water holding capacity, pH, electrical The wider use of MPTS, especially nitrogen fixing conductivity (EC), available N, P and K. tree species, would become an important factor in Bulk density, particle density and porosity were improving productivity and maintaining an enhanced determined by RD bottle method (Chopra and Kanwar, nitrogen status in many tropical land use systems and 1986). Water holding capacity was determined by the also increase productivity and economic returns. method using Keen Raczkowski box (Keen and Therefore, multipurpose tree species should be Raczkowski, 1921) as described by Piper (1950). Soil introduced in degraded lands to exploit their ability to pH and electrical conductivity were determined in a 1: provide the basic needs of people and protect the 2.5 soil : water suspension. Organic carbon was estimated environment which also play main role for soil by Walkley and Black (1934) method. Available N was conservation and management. determined by alkaline KMnO4 method of Subbiah and MPTS have shown their worth in meeting the Asija (1956). Soil samples were analyzed for M. NaHCO3 objectives of social forestry. The present study hence extractable P (Olsen et al., 1954). Available K in soils aims on the economic viability of the multipurpose tree was extracted by natural normal ammonium acetate species in the degraded lands. (Jackson, 1973) and determined by the flame photometer. Internat. J. Forestry & Crop Improv.; 7(1)June, 2016 : 35-40 36 HIND AGRICULTURAL RESEARCH AND TRAINING INSTITUTE ECONOMIC EVALUATION OF MULTI PURPOSE TREE SPECIES EXPERIMENTAL RESULTS AND ANALYSIS Soil physical properties : Bulk density of soil under all tree species was The results obtained from the present investigation decreased as compared to initial status of soil. It was as well as relevant discussion have been summarized lowest in Dalbergia sissoo, Anogeissus latifolia under the following heads : Albezia lebbeck and Hardwickia binata as compared to the Eucalyptus tereticornis. The decrease in bulk Biomass distribution : density may be attributed to increased interaction of Biomass productivity differed significantly among concentration of root, leaf litter and soil faunal activity. the different trees species (Table 2). The total biomass As in verse relationship was noticed between bulk density was significantly higher in Albezzia lebbeck followed and soil organic carbon. Bulk density may affect the soil by Eucalyptus tereticornis and Grevillea robusta as porosity and thereby affecting infiltration rate and water compared to other tree species. The biomass distribution holding capacity of soil. Similar results were reported by in poles was maximum in Eucalyptus tereticornis Hosur and Dasog (1995). The effects being attributed to followed by Grevillea robusta. Small branches, biomass increased micropores of soil