Woody Species Diversity of Parkland Agroforestry in Ethiopia

摘要

Parkland agroforestry system has a crucial role in social, economic and environmental value. For instance, woody tree in Parkland improve soil fertility and enhancing crop productivity. Parkland tree have a potential of AM colonization and increase soil moisture to facilitate microbial activity. Park land agroforestry is a system where farm crops are mixed with trees to supply fodder, fuel, leaf litter, medicinal herbs, fruit, timber, etc. Predictably, the farmers have only grown a single crop on one field. Also, there is a belief that crops cannot grow well in the shade of nearby trees, so trees will often be cleared from cropland. In the days when there was plenty of forest near to the village, there was no shortage of fuel, fodder, etc. But now, overcutting of fodder, firewood, timber, etc., and grazing livestock, has destroyed the forests. So farm yields have become lower and lower. More landslides have been an extra problem. By planting parkland land agroforestry, farm needs for fodder, timber, fuel, etc. can be met as well as protecting the environment.