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Karakteristik indeks vegetasi pada berbagai penggunaan lahan di hulu sub DAS Cikapundung melalui interpretasi citra satelit Landsat 8 Muhammad Amir Solihin; Noviani Putri; Ade Setiawan; Daud Siliwangi; Machfud Arifin
Kultivasi Vol 19, No 3 (2020): Jurnal Kultivasi
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/kultivasi.v19i3.28625

Abstract

SariPerubahan penggunaan lahan di hulu Sub DAS dapat berdampak pada kondisi DAS secara keseluruhan. Pemantauan kondisi eksisting perubahan penggunaan lahan diperlukan. Salah satu cara untuk memantau kondisi penggunaan lahan yaitu melalui monitoring indeks vegetasinya. Penelitian ini bertujuan untuk melihat karakteristik indeks vegetasi pada penggunaan lahan di sebagian Hulu Sub DAS Cikapundung. Lokasi studi terletak di Desa Cikole, Cikidang, Cibodas, Wangunharja, dan Suntenjaya di Kecamatan Lembang. Penelitian ini dilakukan melalui interpretasi citra satelit landsat 8. Metode analisis yang digunakan berupa transformasi indeks vegetasi menggunakan NDVI untuk merepresentasikan tingkat kehijauan dan kerapatan vegetasi pada lokasi studi. Hasil analisis menunjukkan karakteristik NDVI yang berbeda pada setiap jenis penggunaan lahan. Nilai NDVI pada lokasi studi berkisar antara (-0,228426) – 0,461794. Tingkat kehijauan vegetasi di lokasi studi dominan pada tingkat kehijauan rendah dan kerapatan vegetasi dominan pada kerapatan jarang. Keragaman karakteristik penggunaan lahan di lokasi studi dipengaruhi oleh adanya variasi jenis vegetasi, sebaran vegetasi, dan jenis material objek. Perlu pengelolaan penggunaan lahan yang tepat untuk meningkatkan peran ekologis kawasan sekaligus mengurangi erosi dan aliran permukaan di hulu sub DAS Cikapundung.Kata Kunci: Cikapundung, DAS, indeks vegetasi, landsat 8, penggunaan lahan AbstractLand use changes in the upper watershed have an impact on the overall condition of the watershed. Monitoring existing conditions of land use change is needed. One way to monitor the land use condition is through monitoring the vegetation index. This study aimed to identify characteristics of vegetation index on various land uses in the upstream of the Cikapundung watershed. The study sites were located in Cikole, Cikidang, Cibodas, Wangunharja, and Suntenjaya of Lembang District. The resereach was done using Landsat 8 satellite imagery interpretation The analytical methods were used the transformation of vegetation index using NDVI to represent the level of greenness and density of vegetation at the study site. The results of the analysis shown that characteristics of the vegetation index were different for each type of land use. NDVI values had ranged from (-0,228426) - 0,461794. The greenness vegetation level was dominant at low greenness, while dominant vegetation density was spare. The diversity of land use characteristics were influenced by variations in vegetation types, vegetation distribution, and material types of objects. Appropriate land use management is needed to enhance the ecological role of the area as well as reducing erosion and surface runoff in the Cikapundung sub-watershed.Keywords : cikapundung, land use, landsat 8, vegetation index, watershed
Keterkaitan parameter nilai pH, C-organik, N-Total, C/N dan alofan pada beberapa Andisols di Jawa Barat Rina Devnita; Mahfud Arifin; Ridha Hudaya; Ade Setiawan; Apong Sandrawati
Soilrens Vol 15, No 1 (2017)
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/soilrens.v15i1.13459

Abstract

The correlation of chemical parameters and soil mineralogy one to another in Andisols were interesting to be studied, to increase the understanding of soil reactions, nutrient availability and soil mineral content. Andisols from three locations and derived from three different volcanic eruptions namely G. Tangkuban Parahu, G. Patuha and G. Tilu, with andesite, andesite-basalt and basalt parent materials respectively, were examined the correlation of several soil parameters. The values of pH, organic carbon, total nitrogen, C/N and allophane content were obtained from the soil analysis of every horizon of the soil profiles at each site. Correlation analyses were used to see the relationship of the parameters. The results showed a negative correlation between pH and organic carbon (r = -590 *). The soil pH values were positively correlated with the amount of allophane (r = 0.687 *). The pH values were correlated positively with imogolite content (r = 0.356 *). The pH values were negatively correlated with organic carbon (r = -0.590 *). The organic carbon content was negatively correlated with depth (r = - 0.582 *). The organic carbon content was negatively correlated with allophane (r = 0.707 *). Total nitrogen values were negatively correlated with increasing depth (r = -0.531 *).Keywords: Mt. Tangkuban Parahu, Mt. Patuha, Mt. Tilu, andesit, andesit-basalan, alophane
Dinamika Nitrogen dan Hasil Tanaman Padi Sawah (Oryza sativa L.) Kultivar INPARI 31 akibat Pemupukan NPK 18:8:18 dan Penggenangan Air pada Fluvaquentic Epiaquepts Rija Sudirja; Encep Hidayat Salim; Ade Setiawan; Muhammad Farghan Fauzan
Soilrens Vol 15, No 1 (2017)
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (528.935 KB) | DOI: 10.24198/soilrens.v15i1.13349

Abstract

Fertilizer is one of the crucial means to improving rice productivity. The purpose of this research is to know and understand the behavior of nitrogen in the soil and plant rice (Oryza sativa L.) as well as the highest yields in Fluvaquentic Epiaquepts. This study was conducted in May through September 2015 at the Experimental Garden of Soil and Water Management, Faculty of Agriculture Padjadjaran University, Jatinangor, Sumedang regency. The altitude of place was 725 meters above sea level. The study design used randomized block design (RAK) with ten treatments, various dosage level of NPK 18:8:18 combined with the setting puddles and three replications, thus totaling thirty experimental plots. The results showed a real effect due to the provision of various level dose of NPK 18:8:18 and combinations of settings puddles on plant growth, the content of soil-N, absorption-N, and rice yields, both at the time of vegetative end as well as post-harvest rice. In addition, treatment of NPK 18:8:18 by setting a puddle able to deliver the highest yield at the time of post-harvest each by N-total of 0,64%; N-organic 0,26%; N-NH4 0,11%; N-NO3 0,31%; and absorption-N of plants by 1,80%. This resulted in a relatively high yield of 9.952 kg.ha-1, but not significantly different from NPK doses of 450 and 600 kg.ha-1.Keywords: NPK doses, soil-N, absorption-N, rice yield
Co-Authors Apong Sandrawati Daud Siliwangi Encep Hidayat Salim Machfud Arifin Mahfud Arifin Muhammad Amir Solihin Muhammad Farghan Fauzan Noviani Putri Ridha Hudaya Rija Sudirja Rina Devnita