Studies on hill agro-ecosystems of three tribal villages on the EasternGhats of Orissa, India

摘要

The sustainable indigenous agro-ecosystems of India, a majority of which are degraded or destroyed, need protection. The main objective of this study was to analyse the traditional agro-ecosystems from structural and functional point of view and their interactions with other biophysical and socio-economic characters with a view to offer possible solutions. Analysis of traditional agro-ecosystems of three tribal villa es, inhabited by Kondhs of Eastern Ghats of Orissa, India, revealed that cultivated land occupied 66% of the total land area. This covered valley, shifting and home garden cultivation. Under valley, lice (Oryza sativa L.) showed the maximum productivity (2-4 Mg ha(-1)) among the crops. Minor millets and redgram. (Cajanus cajan (L.) Millsp.) were cultivated under shifting cultivation in one of the villages. Vegetables and spices were the main crop under home garden. In valley agriculture human and draught power were the major inputs of energy, while in shifting cultivation human labour was the only source. Out of the total agricultural yield, 52.5, 90.6 and 75.9% were consumed in the villages of Rajikakhola, Nediguda and Badruguda, respectively. When agriculture, forest and animal husbandry sectors were taken together the average share of agricultural sector to the total consumption in the villages was 68.4%, the rest being contributed by forest, while the contribution of animal husbandry was almost negligible. Agricultural production can be stabilized through available rain water management, application of organic manure to agricultural fields and protection of the existing forests. Abandoned Podu (i.e. shifting cultivation) fields can be improved through agro-forestry practices.