Keragaman Jenis Pohon dan Peresapan Air di Lahan Terbiarkan Setelah Kebun Tradisional

Abstract

Ecological aspects of abandoned lands can be determine from many aspects, including the family diversity and the ability to absorb water. This study aims to determine the important value index based on tree family and the ability to absorb water (infiltration rate and permeability) on abandoned land after traditional gardens. The vegetation survey of trees with a diameter at breast height (DBH) >5 cm was carried out on 10 sub-plots each measuring 20 m × 20 m. Infiltration rate and permeability measurements were carried out 3 times with 3 repetitions each. The highest family significance values (FIV) were Euphorbiaceae (104.07), Moraceae (84.75), and Sapindaceae (20.94). The infiltration rates were 12.8 cm/hour in secondary forest (gentle slope), 6.0 cm/hour in secondary forest (a rather steep slope), 1.6 cm/hour in open land (gentle slope), and 1.2 cm/hour in open land (a slightly steep slope). Permeability in secondary forest (gentle slope), secondary forest (a rather steep slope), open land (gentle slope), and open land (a rather steep) were 15.45 cm/hour, 11.15 cm/hour, 9.82 cm/hour, and 8.93 cm/hour, respectively. Information about the diversity and water absorption can be used as a basis for consideration in managing abandoned lands in the future.