An analysis of economic benefit and social effect of Pi Te applealfalfa complex ecosystem

The objective of this research was to compare the ecologic and economic benefit of Pi Te apple (Pyrus ussuriensis)-alfalfa (Medicago sativa) and wheat (Triticum aestivum)-alfalfa complex ecosystem in Linxia, Gansu Province. Soil bulk density was 1.39 and 1.45 g/cm3, noncapillary porosity was 4.72% and 4.15%, and overall porosity was 58.96% and 50.80%, respectively. Soil holding water capacity in the first ecosystem was higher than that in the second. Waterholding rate in leavesstems of alfalfa and wheat was 37.3% and 25.8%. Income in the first ecosystem was more than the second. These indicate M.alfalfa are more beneficial to the soil conservation and economic development than wheat in the apple ecosystems.