Short Communication: Analysis of weed vegetation in immature and mature oil palm plantations

Abstract

Abstract. Satriawan H, Fuady Z. 2019. Analysis of weed vegetation in immature and mature oil palm plantations. Biodiversitas 20: 3292-3298. The species of weeds which grow and dominate in palm oil areas depend on location, local climate, and the light received. This research aimed to determine the diversity of weeds in the planting of palm oil with a different age grown in 2012, 2013, 2014 and 2016. The sample slots measured uniformly at 1 m x 1 m totaling 25 plots. Vegetation analysis was conducted to the density (D), relative density (RD), frequency (F), relative frequency (RF), important value index (IVI), Summed Dominance Ratio (SDR), and Species Diversity Index (H’). Weed composition includes 21 families with 36 species, with the total number of each individual during the year of palm oil planting was 3540, 3148, 3731, and 2910. The relative density value of the highest weeds in the planting year group in 2012 and 2013 were Asystasia intrusa (20.22% and 21.05%), in 2014 were Eleusine indica (23.93%) and 2016 were Cynodon dactylon with 24. 49%. The importance value of weeds in four groups in planting year of oil palm was also in line with the relative density value. These were A. intrusa in 2012 and 2013, amounting to 27.41 and 27.95 and in 2014 and 2016, totaling to 23.72 and 37.64 was E. indica and C. dactylon. The value of the highest species diversity of 6.85 was found in the year 2014, followed by 2012 with 5.88.

The potential of Asystasia intrusa weed of Acanthaceae family as a cover crop in oil palm plantations

“…In general, oil palm plantations have nuisance plants called weeds. Satriawan and Fuady (2019) stated that the most common weed species found in oil palm plantations is Asystasia intrusa. The weeds belong to the same family as Asystasia gangetica (L.) T. Anderson.…”

METABARCODING IN DIET ASSESSMENT OF ADULT PARASITOID SPECIES, Dolichogenidea metesae (HYMENOPTERA: BRACONIDAE) TOWARDS ITS CONSERVATION AND MANAGEMENT IN THE OIL PALM PLANTATION

“…In this study, the molecular data and the mathematical analysis showed that there was no significant difference in plant diversity in the D. metesae diet between the GAP and non-GAP plantations (Figure 5), even though the agricultural practices differed significantly between the two in terms of chemical application (Saswattecha et al, 2015), which would have had very significant impacts on the diversity of weeds and the associated biota (Darras et al, 2019). This might be because in our study, the weed species commonly found in the oil palm plantations such as A. gangetica, Clidemia hirta and Drymaria cordata (Ali et al, 2021;Satriawan and Fuady, 2019) could not be traced or detected in the diet of D. metesae (Figure 2). However, A. gangetica had been documented in other studies as having an important role in the abundance of parasitoids other than D. metesae (Wood and Norman, 2019a).…”

Diversity, nutrient contents and production of forage plants in an integrated cattle livestock-oil palm plantation in East Kalimantan, Indonesia

“…Analysis of vegetation composition and diversity followed Tjitrosoedirdjo et al (1984) and Satriawan & Fuady (2019). The community composition of understorey vegetation that grows on oil palm plantations was analyzed using Important Value Index (IVI) and calculated as follow:…”