DIVERSITAS TUMBUHAN TAHAN KEKERINGAN DAN MANFAAT BIOMASANYA UNTUK REMEDIASI TANAH

Abstract

In support of healthy agriculture development to improve farmer’s prosperity status, soil remediation and land conservation efforts maybe relied on the use of biomass of local vegetation. Results of field exploration conducted at Brantas Watershed of East Java for the period of 2001-2002 indicated that there were at least 154 species of scrubs under growth, 47 species of agriculture-plantation crops, and 59 species of road shelter trees. The native undergrowth vegetation had undergone enormous seasonal variations. Biomass of predominance vegetation, e.g. Psophocarpus tetragonolobus, Phaseolus lunatus, Flemingia, Mimosa somian, Acacia villosa, Cassia mimosoides, Mucuna could potentially be used as organic matter sources to improve availability of nitrogen and phosphorus in soils. The amount of nitrogen and phosphorus contributed of the plant biomass significantly correlated with quality of the biomass