Penilaian Kadar Basa-Basa Tukar dan Kejenuhan Basa Tanah serta Pertumbuhan Tanaman Gambir (Uncaria gambir Roxb) di Kebun Inti Gambir Kabupaten Pakpak Bharat

Abstract

AHMAD SYARIP RAMBE: Appraisal ofBase-Base Change andSoil Base SaturationwithGambier(Uncaria gambierRoxb) Plants GrowthinPakpakBharat GambierCoreGardens. Under the Supervision of RAHMAWATY and ABDUL RAUF. Gambieris one of thecommoditiesthatpeople'seconomic value. Gambier is the shrubsand includedasnon-timberforest products. PakpakBharatisthe largestproducing gambier areainNorth Sumatra. This reseach aimsto analyze base-base changesuch as potassium(K), Sodium(Na), Calcium(Ca), magnesium(Mg), cation exchange capacity(CEC) andbase saturation(KB), with analyze gambier plants growth. This reseach was performed in Juni – September 2013 at Gambier Core Gardens Pakpak Bharat. Chemichal analysis of the soil was performed at Riset and Technologi Laboratory, College of Agriculture, Nort Sumatra University, Medan. Valueofallthe parameterstestedwithleast significant differencetest. The result showed that landpositionandgrowth ratesignificantly effectthe numberof shoots. Landposition also showed significantexchangerateof Nadd, Cadd, andKTK. Land position and growth rate don’t significanteffect to Kdd, Mgdd, and KB.