Pengaruh Pemberian Fungi Mikoriza Arbuskula (FMA) pada Media dengan pH Berbeda terhadap Pertumbuhan Semai Mindi (Melia Azedarach)

Abstract

Arbuscula mycorrhizal fungi are biological agents capable of assisting in post-mining land rehabilitation programs and repairing critical land. Plants associated with AMF can absorb more nutrients such as P, K, Ca, Mg, Fe, Cu, Na, S, and Mn. In addition, AMF can increase host growth and extend root life so that plants can survive, increase resistance to water shortages in the soil, high soil temperatures and soil toxins. The optimum soil pH for spore germination depends not only on the AMF species but also on the nutrient content in the soil. Mindi is a tree-habitual plant, belonging to the Meliaceae family group. It grows in the lowlands to the highlands, at an altitude of 0-1200 mdpl, can grow at a minimum temperature of -5oC, a maximum temperature of 39oC with an average annual rainfall of 600-2000 mm. This study aimed to determine the effect of AMF on the growth of Mindi (Melia azedarach) seedlings at several soil pH values. Mindi seedlings are used for seedlings that are about 2 months old. This study used a factorial RAL (Completely Randomized Design) study design with two factors, namely mycorrhizal doses and different pH which were repeated 5 times. The mycorrhizal factor was without mycorrhizal and 20gr mycorrhizal per plant, while the pH factor consisted of pH 4.5, pH 4.8, pH 5 and pH 5.4. The maintenance of mindi seedlings was carried out in the Faculty of Agriculture, University North Sumatra, greenhouse and laboratory tests were carried out at the Soil Biology Laboratory, Faculty of Agriculture, University of North Sumatra. This research was conducted in August – December 2021. The conclusion obtained in this study is the effect of the interaction between mycorrhizae with different pH on the growth of mindi seedlings can be seen in the parameters, namely, plant height, plant diameter and plant dry weight.