RELATION OF NITROGEN, ASH CONTENT, C-ORGANIC, pH AND WATER TABLE WITH STEM DIAMETER AND HEIGHT OF ALBIZIA CHINENSIS (OSBECK) MERR.: A CASE STUDY OF PEAT SOILS IN GANDANG BARAT VILLAGE, PULANG PISAU REGENCY OF CENTRAL KALIMANTAN, INDONESIA

Abstract

This research was conducted with the aim of knowing the relationship between nitrogen content, ash content, C-organic, soil pH and water table depth with stem diameter and plant height of sengon. This research was conducted from January to April 2020 at Peat Soil in Gandang Barat Village, Pulang Pisau Regency, Central Kalimantan. The method used is descriptive exploratory, namely by conducting a survey in the field at the location of peatlands where sengon is cultivated, then followed by taking soil samples in the field at a depth of 0-30 cm and 30-60 cm, at a distance of 1 meter from the stem. The results showed that the nitrate content was related to the stem diameter and height of the plant and the depth of the groundwater level (GWL) was related to the plant height (PH), but was not related to the stem diameter (SD) of the sengon plant. Nitrate at 0-30 cm depth and ground water level have the largest contribution to sengon PH. The sengon equations form are PH = 5,036+1,060 N-NO3- and PH = -130,286+2,392 GWL, while for the total N content, ammonium, pH, C- organic and ash content were not related to stem diameter and plant height of sengon.

Keywords

• peat
• nitrogen
• ash content
• c-organic
• ph
• groundwater level