The power to manifest profits to a company is considered to be the key to success in creating good decisions about a company's financial performance. This current research aims to empirically prove ...the relationship between liquidity ratios, solvency, activity, profitability, and financial performance. The objective of this study is to statistically show whether liquidity, solvency, activity and profitability affects financial performance. This research uses secondary data that is obtained from food and beverage companies' financial reports that are listed from the Indonesian Stock Exchange between 2019-2021 time period. Determinants are analyzed using multiple linear regression methods using SPSS ver.26. The results of this research proves that solvency and activities affect financial performance, while liquidity and profitability do not affect financial performance. The difference between this study and previous research by Rumina and Desy (2021) is the addition of independent variables, namely solvency and activity variables.
Budiadi, Musyafa, Hardiwinoto S, Syahbudin A. 2020. Changes in insect biodiversity on rehabilitation sites in the southern coastal areas of Java Island, Indonesia. Biodiversitas 21: 1-7. ...Rehabilitation activities on coastal areas such as mangrove wetlands and dry-sandy soils may cause a change in the environmental quality, including insect diversity and their role. The research was conducted to compare the effect of stand structure on the rehabilitation areas of the south coast of Java Island and measure insect biodiversity affected by the changes to land cover. Systematic sampling technique was employed in four different land covers, i.e., dryland site of 10-year old Casuarina equisetifolia, and wetland sites of 12-year old Avicennia sp., mixed mangrove, and open grassland. Experimental plots (100 m x 10 m) were established for day- and night-time insect observation and tree inventory. Results showed that stand structure in the rehabilitation areas was low in tree diversity and lesser occurrence of natural regeneration. The insect taxa were dominated by Coleoptera in the Avicennia and mangrove stands, while different types of grasshopper of Acrididae were found in the grassland and Casuarina stands. Richer and more roles of insect species were found in mixed stands than in monoculture, and more in established stands than open grasslands. The rehabilitation activities change the microenvironment and insect diversity but have yet not been considered as an indicator of the success of rehabilitation.
Agroforestry practices have a pivotal role to reduce the CO2 concentration in the atmosphere and they subsequently store the carbon in part of stems, branches, roots, and crowns of the trees ...composing their vegetation communities. The objective of the research is to determine the carbon stocks in the three agroforestry practices. These are Multilayer Tree Garden (MTG), Taungya (TGY), and Home Garden (HMG). The research was carried out from May 2017 to November 2017 at Sragen and Karanganyar Regency, Central Java. A plot size of 20 m x 100 m for big trees, 5 m x 40 m for small trees, and 1 m x 1 m for understory vegetation was used in the sampling. The carbon stock was measured by Chave's allometric equation. The carbon stock in the multilayer tree garden is the highest (44.47 Mg C/ha) compared with the taungya (38.81 Mg C/ha) and home garden (31.41 Mg C/ha). Meanwhile, the above-ground carbon stock in the home garden practice is the biggest (14.97 Mg C/ha or 48 %) among the multilayer tree garden (9.67 Mg C/ha or 23%) and taungya (6.11 Mg C/ha or 16%). A 14-year-old G. versteegii in the taungya practice has the biggest carbon stocks (2.46 Mg C/ha) compared to the multilayer tree garden (1.73 Mg C/ha) and home garden (0.56 Mg C/ha).
Information on litter productivity and its nutrient return of tree species are essential for consideration in selecting tree species. The study was carried out to quantify the litter productivity and ...macronutrient (N, P and K) deposition through leaf litter to forest floor under 2-3 years old three native tree species of tropical peatland forest. Those three species are mahang (Macaranga pruinosa), geronggang (Cratoxylum arborescens) and skubung (Macaranga gigantea). These three native species coincide with one exotic species krassikarpa (Acacia crassicarpa) were planted on the drained tropical peatland in Riau using a randomized completely block design. Litter trap was set up on this experimental plot for litter productivity measurement. Nutrient content of leaf litter was analyzed to quantify the nutrient return. Results showed that the maximum litter productivity and leaf litter nutrient return was found in geronggang. Litter productivity, N return, P return, and K return of this native tree species were 7.04 ton ha−1yr−1, 60.69 kg ha−1yr−1, 10.82 kg ha−1yr−1 and 57.68 kg ha−1yr−1, respectively. These results suggested that forest and land productivity could be better maintained by Cratoxylum arborescens plantation than other native tree species. In terms of litter productivity and leaf litter nutrient return, this species is, therefore, more recommended than Macaranga pruinosa and M. gigantea.
Hardiwinoto S, Ardiansyah F, Widiyatno. 2021. Application of selected teak clone and organic fertilizer to accelerate rehabilitation of lowland forest of Java, Indonesia. Biodiversitas 22: 1750-1756. ...Lowland forest in Java Island Indonesia is dominated by teak forest. However, for some decades, the forest has degraded and decreased teak wood production. Rehabilitation of the degraded forest is needed to accelerate the forest land cover. Vegetative propagation of selected clones is one of the techniques used in the asexual reproduction of plants to maintain superior genetics from ancestors to their offspring. In addition, adding organic fertilizer can improve the chemical and physical properties of degraded sites. In this study, vegetative propagation techniques of selected teak clones and addition of organic fertilizer were used to rehabilitate the degraded forest. The objectives of the research were to determine the best propagation technique and appropriate dosage of organic fertilizer toward the early growth of clonal teak plantations. The results showed that the height and diameter parameters did not significantly differ for vegetative propagation and interaction with organic fertilizer dosage (P > 0.05). However, the dosage of organic fertilizer significantly increased the DBH of the teak (P < 0.05), although the height parameter did not significantly differ among dosages of organic fertilizer (P > 0.05). The best dosage of organic fertilizer was 5 kg/individual, under which the average growth in height and diameter of teak at 14 months was 3.79 and 5.60 cm, respectively. This suggests that vegetative propagation of selected teak clones and addition of 5 kg/individual organic fertilizer could be implemented to support the successful rehabilitation of degraded forests.
Arrowroot (Maranta arundinacea) is an herbaceous plant that is widely grown under the shade of trees and has the potential to be cultivated as a source of food, medicine, feed, fibers, biopolymers, ...and biopolymer composites industries. The purpose of the research was to identify the growth, tuber yield, and starch content of arrowroot accessions planted at different altitudes and tree shades in Garut District, West Java, Indonesia. A factorial design using a randomized block design with four blocks was used to analyze the field performance of 6 arrowroot accessions planted under different altitudes (low, medium, and high altitudes) and under different sengon (Falcataria moluccana) tree ages, i.e., 1-, 2- and 3-years. The result showed that the altitude, tree shade, and accession significantly affected the growth, tuber, and starch yield. The plant height, leaf area, number of tillers, plant biomass, and tuber yield tends to decrease with increasing altitude. The growth parameters showed a positive correlation with tuber biomass and starch content, indicating that the growth could be a good indicator for genotype selection. Cultivation of arrowroot in the lowland area under sengon tree stand of 3 years old provided the highest tuber biomass and starch yield. The best accession for starch yield in low and medium altitude areas is the Limbangan accession, but for the highland areas, the Cilawu accession had the highest starch yield.
Understanding tropical forest characteristics, including forest derivative products such as agarwood, is pivotal. This study focused on perceiving an ideal habitat of the lowland tropical forest ...ecosystem of West Papua for agarwood-producing tree species. In further, this study identified a close association of biotic and abiotic characteristics to underpin agarwood-producing tree growth. Six sites in three different locations were established to ascertain forest composition and the associated insects. Soil samples were collected to analyze their physical and chemical properties using the Kjeldahl, the Walky and Black, and Atomic Absorption Spectrophotometry (AAS). In addition, temperature, relative humidity, and light intensity were measured. The results noticed two agarwood producing species, Gyrinops caudate and Aquilaria sp., found at an altitude of 400–402 masl in Manokwari, 200–300 masl in Teluk Wondama, and 167.7 masl in Teluk Bintuni. There were no significant differences in temperature, relative humidity, and light intensity. The soil cation exchange capacity was moderate in Manokwari, but it was low in Teluk Wondama and Teluk Bintuni. Total C-organic content in three research sites was classified as high. However, total N content in the three research sites was in the moderate category. The ideal habitat for agarwood in the West Papua forest is from the lowlands to the highlands. Environmental conditions that support the growth of agarwood are moderate temperature, high humidity, and moderate light intensity. Soil fertility also affected the natural growth of agarwood trees.
Keywords: abiotic, agarwood association, lowland tropical forest, soil characteristics
The selection of species for enrichment planting that involves native species in a secondary lowland dipterocarps forest as one of the tropical rainforest types should be conducted to maintain the ...sustainable management of tropical rainforests. The research of species trial of dipterocarp species was planted under a randomized complete block design with four replications. The following parameters were examined: survival rate, diameter breast height (DBH), pilodyn penetration (PP), and stress wave velocity (SWV). The survival rate (F = 1.72; p = 0.047), DBH (F = 6.67, p < 0.0001), and pilodyn penetration (F = 14.19; p < 0.001) significantly differed at 12.5 years after planting. The survival rate of Shorea leprosula was the highest (85%) of all the species, and the survival rate of other species, namely, S. macrophylla, S. ovalis, S. johorensis, S. scaberima, and S. parvifolia, was more than 70%. The best growth of DBH parameter was observed in S. platyclados. The DBH growth of S. platyclados 12.5 years after planting were 27.62 cm (mean annual diameter increment MADI = 2.2 cm/year). The species whose growth in DBH was similar to those of S. platyclados were S. leprosula, S. parvivolia, and S. ovalis. However, stress wave velocity (SWV) was not significantly different among dipterocarp species (F = 1.26; p = 0.234). Pilodyn penetration (PP) was significantly correlated with DBH (Pearson's correlations = 0.306; p < 0.001), whereas stress wave velocity was not significantly correlated with DBH and PP (p > 0.05), and their Pearson's correlations were 0.043 and −0.012, respectively. These results suggested that each dipterocarp species varied in terms of their growth and wood properties. Thus, choosing the species for enrichment planting in secondary tropical rainforests depends on the characteristics of each species and the desired final product of forest management.
PDF
