Journal of Soilscape and Agriculture

Macroinvertebrate Diversity as Bioindicator of Water Quality in Anggoeya River, Kendari City

Agnes Trixsy Koty — 2024-04-01

Anthropogenic activities will affect the quality of river water and the living things in it, including macroinvertebrates. Anggoeya River is one of the rivers that water source is used as raw water for PDAM Kendari, so its quality needs to be considered. The purpose of this study was to analyze the water quality of Anggoeya River using macroinvertebrate bioindicators and the relationship between macroinvertebrates and physicochemical parameters of water and substrate of Anggoeya River. Physico-chemical parameters consist of temperature, current velocity, TSS, turbidity, pH, COD, BOD, DO, substrate pH, and substrate type. The sampling technique used purposive sampling, where macroinvertebrate sampling was carried out at three points at each station three times repetitions, namely on the left, middle, and right sides of the river, based on the type of river habitat, namely pool, riffle, and rapid. Top of Form The results obtained for the highest diversity value is at Station I with a value of 1.99 and the highest dominance value is at Station III with a value of 0.98. As for the best FBI value of the three stations, namely at Station II with a value of 5.43 with a moderate organic matter pollution category. For the results of physicochemical parameters, some of which do not meet or exceed the Quality Standards based on Government Regulation Number 22 of 2021, namely TSS at Station III, BOD at Station I and Station II, and DO at Station III. The results of the macroinvertebrate diversity index relationship with physicochemical parameters has a strong to very strong relationship.

Growth Response and Yield of Stevia (Stevia rebaudiana) to Giving Old Coconut Water and Different Types of Irrigation

Sahidatun Fahima — 2024-04-03

The purpose of this study was to determine the response and yield of the stevia plant to different concentrations of old coconut water combined with two different types of irrigation, namely drip irrigation and sprinkler irrigation. The experimental design was a split plot with the RAK basic design pattern and two factors. The first factor is the use of different irrigation types, including drip and sprinkler irrigation. The second factor is the concentration of coconut water, which consists of 5 levels, namely A0 = 0% coconut water concentration, A1 = 25% coconut water concentration, A2 = 50% coconut water concentration, A3 = 75% coconut water concentration, and A4 = water concentration coconut 100%. Data analysis used the T-test to determine the effect of the type of irrigation and ANOVA to determine the impact of giving old coconut water with the F test at level α = 0.05. A DMRT test was done to measure the significant values of the ANOVA test. The results showed no interaction between different irrigation types and coconut water concentration for all observational variables. Different kinds of irrigation showed significant differences in some parameters. Giving old coconut water gives different results in each experiment.

Application of Black Water from Vegetable Waste with Decomposers in Planting Media Based on Blotong on Growth and Yield of Water Spinach

Muflikhatul Badriyah — 2024-04-08

Utilization of vegetable waste can be used as organic fertilizer such as black water. Black water from vegetable waste is used as fertilizer to increase the growth and yield of water spinach. Black water can be made by using a decomposer in the form of lumbricus sp and EM4 worms to help with the decomposition process. The planting medium of filter cake compost is an additive for soil amendments that support the availability of nutrients in plants. This study used the addition of decomposers EM4, rumen MOL, and Trichoderma sp. This research used a two-factor factorial with a completely randomized basic design (CRD) consisting of 2 factors and three replications. The interaction between the application of the black water decomposer and the filter cake media did not have a significant effect on all the observed variables. Likewise, with the single factor, the application of black water does not have a significant effect on all observed variables. The single factor in the treatment of using filter cake media has a substantial impact on all observational variables. The best treatment was on M3, comparing the composition using 20% filter cake planting media and 80% soil.

Analysis Of Land Use Change And The Suitability For Regional Spatial Planning (RTRW) In Kolaka District

Rifky Sanjaya — 2024-04-23

Land use changes that occur due to population pressure and land conversion that are not in accordance with the RTRW will affect the sustainability of the development of an area. In the period 2003 to 2013, it is known that land changes occurred in Kolaka sub-district, namely that the production forest experienced a reduction in area of 266.26 Ha of the total land area, which was converted into dry land. Some possibilities include land conversion from forest area to plantation land by residents. Meanwhile, in the period 2013 to 2023, Production Forests became land with a very large degraded area, where an area of 1884.48 ha was converted into wetlands, dry lands, and as limited production forests. The condition of this land use change was then analyzed for its suitability to the 2012 - 2023 RTRW of Kolaka Regency. It was found that 75.53% or an area of 10,579.55 ha of the existing area was still suitable, while the unsuitable area was 24.47% or an area of 3426.91 ha.