Lygodium circinatum (Burm) Sw: Distribution Pattern and Environment Factors Influencing its growth in Lombok Island Forest Nature, ntb

Abstract

Ketak (Lygodium circinatum (Burm.) Sw naturally grows in the forest and is classified into ferns group which produced from non-timber forestry product (HHBK). Ketak growth and productivity data are not represented well so cultivation strategic research must be constructed. This research is aimed to explore biological characteristic rely on Ketak distribution and cultivation in Lombok island, determine host plant for vegetative and tendril growth, identify tendril requirement to support cane works. The method is used purposive systematic sampling using looking for target and sampling as survey area. Then, a survey area was based on three high sea level as follows, 0-250; 250-500 dan above 500 on sea level. Research parametric were investigated including relative humidity, temperature, relative light intensity to tendril productivity. Co-variance and regression were used to process environmental influence on Ketak productivity, height and tendril diameter. This research observed that the largest tendril diameter and populated Ketak occurred in the lowest sea level cultivation whereas the highest tendril was found in the highest cultivation. Then, higher relative humidity supported ketak and tendril growth however lowering temperature growth produced longer and small tendril diameter. A larger amount light intensity enhanced tendril productivity. Host plants that support Ketak growth are Aren and Cecuring (0-249 m osl); Waru and Kumbi (250-499 m osl) and coffee and Aren (>500 m osl).