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All Journal Vegetalika Plantropica: Journal of Agricultural Science Jurnal Biologi Tropis KOPEMAS
Anita Dwy Fitria
Universitas Siliwangi
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology Social Sciences

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Can Landuse Intensification Decrease Soil Carbon Stock in Upstream Sumber Brantas Watershed? Anita Dwy Fitria; Syahrul Kurniawan
Jurnal Biologi Tropis Vol. 23 No. 3 (2023): July - September
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v23i3.4979

Abstract

Upper Brantas watershed with volcanic ash soil has potentially high carbon stock. However, land-use intensification in the upstream watershed area is the potential deterioration of soil quality, mainly degradation. The study aimed to assess the effect of land-use intensification in the upper Sumberbrantas watershed on soil carbon stock. The study was conducted in the upper Sumber brantas watershed, particularly in Kali kungkuk micro watershed, Batu City, East Java – Indonesia. Soil samples were taken at 0-30 cm and 30-100 cm on 4 land uses (i.e., forest, agroforestry, cropland, and shrubland) with three replications. The variable measured include basal area, standing litter mass, soil bulk density, and soil organic C. The results showed that land-use intensification strongly impacted soil carbon stock at 0-30 cm and 30-100 cm depth of soil. The soil carbon stock degradation of around 60% to 67% in the intensive cropping systems and in the post-cropping cultivation was covered by a shrub as compared to the forest soil, especially at a depth of 0–30 cm. The correlation value (p<0.05) between the basal area (0.65) and standing litter mass (0.42) on soil carbon stock, especially at a depth of 0-30 cm, indicated that the basal area and standing litter mass increase soil carbon stock. The result was in line with the soil bulk density by ANOVA test at a depth of 0-30 cm and 30-100 cm showing the effect (p<0.05) where intensive land use consisting of treeless (i.e., cropland and shrubland) increases the soil bulk density.
Sub-Optimal Dry Land Management: Potential for Local Food Cultivation of Dioscorea sp. (Gembili) to mitigate food security in Sukoharjo Regency, Central Java Anita Dwy Fitria; Octaviana Helbawanti; Leny Yuliyani; Hendar Nuryaman; Abdul Hakim; Gilang Vaza Benatar
Plantropica: Journal of Agricultural Science Vol. 9 No. 1 (2024)
Publisher : Department of Agronomy, Faculty of Agriculture, Brawijaya University

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Abstract

Land in Tawangsari District, Sukoharjo Regency had a limiting factor in the form of water availability. One of the local commodities cultivated for generations on dry land in this region is gembili (Dioscorea sp.). However, the gembili cultivation process has not produced optimal productivity and is threatened with extinction. Therefore, gembili cultivation and use of dry land need to be optimized by carrying out integrated land management. The aim of utilizing dry land is to increase local food production and sustainability as alternative food and maintain national food security. This research was conducted using data on productivity, quantity and type of fertilizer obtained through interviews with gembili farmers and secondary data on soil types obtained from BPP Tawangsari District, Sukoharjo Regency. The results showed that grumusol and lithosol soil types had no significant effect (p > 0.05) on gembili productivity. Providing organic + inorganic fertilizer with giving organic fertilizer without a combination produced values that were not significantly different (p > 0.05). However, the average productivity results were sequentially from grumusol and lithosol (6.1 ton.ha-1 and 7.1 ton.ha-1). Meanwhile, the use of organic fertilizer is 8.06% higher compared to organic fertilizer + inorganic fertilizer. The results of the multiple regression test for organic fertilizer had a significant effect (p < 0.05) on the productivity of Dioscorea sp..
UJI CEPAT STATUS HARA TANAH SEBAGAI REKOMENDASI PEMUPUKAN: PENINGKATAN KAPASITAS USAHA TANI KAPULAGA, BANJARANYAR KABUPATEN CIAMIS Anita Dwy Fitria; Dwi Apriyani; Rizki Risanto Bahar
Konferensi Nasional Pengabdian Masyarakat (KOPEMAS) #5 2024 Konferensi Nasional Pengabdian Masyarakat (KOPEMAS) #4 & International Community Service 2023
Publisher : Konferensi Nasional Pengabdian Masyarakat (KOPEMAS) #5 2024

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Abstract

Evaluasi status hara merupakan bagian dari proses budidaya tanaman. Lahan sebagai salah satu faktor produksi menjadi salah satu penentu produktivitas tanaman kapulaga. Kesuburan tanah menjadi salah satu penyebab rendahnya kuantitas dan kualitas kapulaga di Desa Kalijaya. Oleh karena itu, penyuluhan dan praktik evaluasi status hara dengan PUTK perlu dilakukan untuk meningkatkan pengetahuan petani. Metode penyuluhan dan praktik evaluasi status hara dilakukan dengan Participatory Rural Appraisal (PRA) yang melibatkan masyarakat pada keseluruhan kegiatan. Kegiatan dilakukan dengan pengambilan sampel tanah pada 10 lahan petani kapulaga dengan posisi lereng yang berbeda. Analisis PUTK dilakukan bersama-sama dengan petani. Evaluasi tingkat pengetahuan petani dilakukan dengan memberikan pre test dan post test diakhir kegiatan. Hasil evaluasi status hara menunjukkan hara K dan C organik masuk kedalam kelas rendah, P termasuk kelas rendah pada bagian punggung lereng dan sedang pada bagian pelembahan. Sedangkan pH berstatus agak masam. Adanya penyuluhan dan praktik evaluasi status hara ini meningkatkan pengetahuan petani sebesar 70,23%.
Pendugaan Komponen Ragam Genetik dan Heritabilitas pada Populasi Tanaman F2 Cabai Rawit Hasil Persilangan Capsicum frutescens L. x Capsicum annuum L. Abdul Hakim; Indra Permana; Anita Dwy Fitria
Vegetalika Vol 15, No 1 (2026)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/veg.113975

Abstract

The development of superior varieties requires accurate genetic information, especially on the traits that will be used as selection criteria. Variance components (genetic variance, environmental variance, and phenotype variance) and heritability values are the genetic information for the selection process. Selection will generally be effective if the characters used as selection criteria have heritability values that are included in the high category (> 50%). The objective of this research for estimating the components of variance and heritability in a broad sense for a number of agronomic characters in the second generation (F2) population of cayenne pepper from the hybridization between Capsicum frutescens L. and Capsicum annuum L.  The genetic materials consisted of two parental lines, P1 (Bonita IPB) and P2 (Perisai IPB), each represented by 20 individual plants, and 150 individuals from the F2 generation. Estimation of variance components and broad-sense heritability was performed using the Mahmud–Kramer method. The results of the study showed that the diversity in the F2 population was higher than in both parents. This is indicated by the variance values for all characters being greater than both parents. Traits such as plant height, canopy width, stem diameter, day of flowering, fruit weight per plant, number of fruits per plant, fruit weight, fruit length, and fruit diameter showed high heritability values, while day of harvesting showed moderate heritability. These heritability estimates suggest that effective selection can be focused on traits with high heritability, thereby increasing selection efficiency and enabling favorable genetic progress in subsequent generations.
Co-Authors Abdul Hakim Dwi Apriyani Gilang Vaza Benatar Helbawanti, Octaviana Hendar Nuryaman Indra Permana Leny Yuliyani Rizki Risanto Bahar Syahrul Kurniawan