JURNAL SAINS TEKNOLOGI & LINGKUNGAN

Studi Awal Perbanyakan Cacao (Theobroma cacao L.) Asal Kebun Rakyat Lombok Utara: Pertumbuhan Bibit pada Media Tanah dengan Pupuk Kandang Sapi

Bambang Budi Santoso — 2024-12-20

Cocoa (Theobroma cacao L.) is an economically valuable crop, especially in the chocolate industry. However, cocoa seedling productivity in Indonesia faces challenges such as low-quality seedlings and suboptimal cultivation practices. This study aimed to evaluate the effect of cow manure on the growth of cocoa seedlings from smallholder farms in North Lombok, focusing on its potential as a sustainable nursery management practice. The experiment was conducted using a randomized complete block design with five treatments involving different ratios of cow manure and standard nursery media (topsoil and sand). Seedling growth parameters such as germination rate, seedling height, stem diameter, leaf number, and biomass accumulation were measured at 30, 60, and 90 days after planting. The results showed significant improvements in all growth parameters with the application of cow manure compared to the control. The best performance was observed at 300 g of cow manure per polybag, resulting in a maximum seedling height of 35.2 cm, 14.2 leaves per seedling, and a dry biomass of 34.7 g. The cow manure enhanced soil fertility, improved water retention, and supported microbial activity, contributing to better seedling vigor. In conclusion, cow manure is a viable organic amendment for cocoa seedling production, especially in resource-constrained farming systems

Klasifikasi Multiclass Pada Sound Healing menggunakan Algoritma Pseudo Neareset Neighbor

Cipta Ramadhani — 2024-12-20

Sound healing, or commonly referred to as music therapy using Acoustic Sound for Wellbeing (ASW) equipment such as drums, gongs, bells, and other types that produce specific frequency vibrations, is used in the medical field to help patients experiencing anxiety or depression. Currently, research on sound healing focuses on methods to identify appropriate frequencies that influence stress and anxiety experienced by patients. This study presents the implementation of the Pseudo-Nearest Neighbour (P-NN) algorithm for classifying multiclass ASW. In general, the P-NN algorithm performs better for multiclass scenarios, particularly in identifying outlier data in each class. Furthermore, P-NN provides better performance for all confusion matrix parameters. Using two classes (Gong and Singing Bowl), the accuracy of the P-NN algorithm exceeds 92%. This demonstrates that the P-NN algorithm can provide better performance in handling outliers within the ASW dataset.

Pola Pertumbuhan Karang Genus Acropora Hasil Transplantasi Pada Media Blok Mars dan Meja di Perairan Pantai Pandanan Lombok Utara

Rahmah Fitriani — 2024-09-30

Pantai Pandanan yang terletak di Desa Malaka kecamatan Pemenang merupakan salah satu destinasi wisata pantai yang terletak di Lombok Utara. Pantai Pandanan memililiki ekosistem terumbu karang yang mendukung keanekaragaman hayati lokal dan merupakan bagian penting dari ekosistem laut setempat. Penelitian ini bertujuan untuk membandingkan pertumbuhan karang Acropora yang ditransplantasi menggunakan dua jenis media, yaitu blokmars dan meja, di perairan Pantai Pandanan, Lombok Utara. Penelitian dilakukan selama empat bulan, dari Mei hingga Agustus 2024, dengan pengamatan pertumbuhan panjang karang setiap bulan. Hasil penelitian menunjukkan bahwa karang yang ditransplantasi pada media blokmars mengalami pertumbuhan yang lebih signifikan dibandingkan dengan media meja. Rata-rata pertumbuhan karang pada media blokmars meningkat lebih cepat pada awal periode transplantasi, sedangkan pada media meja pertumbuhannya lebih lambat. Media blokmars terbukti lebih stabil dan efektif dalam mendukung pertumbuhan karang, karena memiliki struktur yang memfasilitasi perlengketan dan penyediaan nutrisi yang optimal. Berdasarkan hasil ini, media blokmars direkomendasikan sebagai pilihan yang lebih baik untuk kegiatan rehabilitasi terumbu karang

Analisis Dampak Perubahan Tata Guna Lahan terhadap Debit Limpasan di Kecamatan Selaparang dan Mataram

Muh Bagus Budianto — 2024-09-30

Selaparang and Mataram Districts are two of the six districts in the Mataram City area that experience changes in land use every year. This change can affect the absorption capacity of groundwater in the area to decrease so that if there is rain with a fairly high intensity, it can cause water to overflow to the surface and inundate the area. This study was conducted to determine the runoff discharge that occurred due to changes in land use that occurred in 2013, 2018, and 2023, and to compare the runoff discharge in 2023 with the runoff discharge based on the Regional Spatial Plan of Selaparang and Mataram Districts in 2011-2031. The initial stage in this study was to collect several secondary data such as rainfall data, land use based on the regional spatial plan, and others that can be obtained from related agencies. After that, the next stage is the delineation of the catchment area and land use analysis with the help of ArcGis and Google Earth software, as well as runoff discharge analysis. The results of the analysis show that the percentage increase in runoff discharge that occurred in Selaparang District in 2013-2018, 2018-2023, and 2013-2023 was 2.21%, 1.40%, and 3.64%, respectively. Meanwhile, the percentage increase in runoff discharge in Mataram District in 2013-2018, 2018-2023, and 2013-2023 was 2.43%, 0.73%, and 3.18%, respectively. Based on this, it can be concluded that the reduction in green land area and the increase in built-up land area each year will cause an increase in the runoff coefficient value, so that the runoff discharge that occurs in Selaparang and Mataram Districts also increases every year.

Uji Biologis Berbagai Formula Pakan Ayam Petelur Menggunakan Maggot BSF

Dwi Kusuma Purnamasari — 2024-09-30

Research on using maggots as a feed ingredient for laying hens is one solution to the problem of increasing feed prices and BSF maggots also have the potential to overcome environmental problems caused by the accumulation of organic waste. The research was carried out in 3 stages, namely: Stage 1. Macronutrient chemical testing of all ingredients to be used in the feed formula for laying hens. Stage 2. Preparation of 3 feed formulas using bran, corn, concentrate, and maggot according to the needs of layer phase laying hens. Stage 3. Biological testing of 3 feed formulas for 120 chickens divided into 3 treatments and 4 replications consisting of 10 chickens, according to a Completely Randomized Design. The parameters observed were feed consumption, egg weight, egg production, FCR, and egg quality both external and internal. The collected data will be tabulated and Analysis of Variance (ANOVA) and Duncan’s Multiple Range Advanced Test will be carried out. This research shows that giving up to 30% maggot was not able to produce better feed consumption, egg weight, egg production, and feed conversion compared to the control. However, based on an analysis of the internal quality of the eggs, the treatment with 30% maggot was able to produce eggs with a high yolk score (9.70±0.66) and was significant compared to the control (8.30±0.75). The conclusion from this research is that maggots have the potential to be used as feed for laying hens up to a level of 30%.