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Dr Yashwant Singh Parmar University of Horticulture and Forestry (2014)

Harnessing major ecosystems and changing livelihood

Poonam

Titre : Harnessing major ecosystems and changing livelihood options in cold deserts of himachal pradesh

Auteur : Poonam

Université de soutenance : Dr Yashwant Singh Parmar University of Horticulture and Forestry

Grade : Doctor of Philosophy (PhD) 2014

Résumé présenté dans KrishiPrabha (Indian Agricultural Doctoral Dissertations Repository)

The present study “Harnessing Major Ecosystems and Changing Livelihood Options in Cold Deserts of Himachal Pradesh” was carried out in the village Goshal of district Lahaul and Spiti of Himachal Pradesh, to study the major linkages and the changes the area is undergoing in its structural and functional aspects of the major ecosystems (forest ecosystem, grassland ecosystem and agro ecosystem) and their likely influence on economy and other natural processes, which covers land use, phytosociological studies, nutrient and biomass estimation and their flow through the different systems. Of the total area of village Goshal maximum area was occupied under second grade irrigated area, pea occupying maximum per cent of the total cropped area. In forest ecosystem among trees, the species of maximum occurrence was Juniper macropoda having maximum leaf nitrogen content. In alpine ecosystem Agropyron longearistatum among grasses and Taraxacum officinale among herbs showed maximum total aboveground biomass.The biomass productivity in case of crops depicted highest aboveground biomass for potato and minimum total biomass was reported for rajmah among crops in agro ecosystem. For water use efficiency Podophyllum peltatum was most water use efficient species in alpine pasture ecosystem. We found that in forest and alpine pasture ecosystem nutrient from trees and shrubs is returned back to the soil while for grasses and herbs 30 per cent of nutrient was decomposed back and remaining some part is returned to the agricultural fields and thus removed out of the system. In agro ecosystem, for traditional crop (barley) the nutrients are returned back to the fields, but in case of cash crops a considerable amount of nutrient is removed out of the system. We found that in case of cash crops the input : output ratio is quite high and which is the basic reason for shifting of the farming community from traditional crops to the plantation of cash crops

Mots clés : Harness, cold deserts,

Lien vers le site KrishiPrabha (Indian Agricultural Doctoral Dissertations Repository)

Page publiée le 28 janvier 2015