Mardhiana Mardhiana
Program Studi Agroteknologi Fakultas Pertanian, Universitas Borneo Jl. Amal Lama No. 1 Tarakan, Kalimantan Timur

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AKTIVITAS ANTIMIKROBA EKSTRAK BAKAU (RHIZOPHORA MUCRONATA) DALAM MENGHAMBAT PERTUMBUHAN RALSTONIA SOLANACEARUM PENYEBAB PENYAKIT LAYU Egra, Saat; Mardhiana, Mardhiana; Rofin, Mut; Adiwena, Muhammad; Jannah, Nur; Kuspradini, Harlinda; Mitsunaga, Tohru
Agrovigor Vol 12, No 1 (2019): Maret
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (267.853 KB) | DOI: 10.21107/agrovigor.v12i1.5143

Abstract

R. mucronata telah banyak digunakan sebagai tanaman obat-obatan tradisional karena mampu menghasilkan metabolit sekunder seperti tanin, alkaloid, terpenoid, sapponin dan flavonoid. Penelitian ini bertujuan untuk mengetahui potensi bagian tanaman daun dan kulit batang sebagai penghambat bakteri R. solanacearum, dengan konsentrasi 5000 ppm, 10000 ppm dan 20000 ppm, kontrol positif (Chlorampenicol), kontrol negatif (Etanol). Metode yang digunakan untuk uji daya hambat menggunakan metode difusi agar sumuran. Hasil penelitian menunjukan faktor kelembaban daun R. mucronata (0.33g) kulit batang (0.58g). Hasil rendemen ekstrak daun (17.61%) kulit batang (7.85%). Persentase penghambatan menunjukkan bahwa ekstrak daun R. mucronata memiliki daya hambat terhadap R. solanacearum pada konsentrasi 20000 ppm dan 10000 ppm masing-masing 31% dan 29%, namun disisi lain pada daun R. mucronata konsentrasi 5000 ppm tidak ada aktivitas daya hambat. Pada sampel yang berbeda Kulit batang R. mucronata menunjukkan adanya aktivitas daya hambat pada konsentrasi 5000 ppm, 10000 ppm dan 20000 ppm dengan nilai persentase secara berturut-turut 34%, 39%, dan 44%.  
KAJIAN TEKNIK PEMBERIAN HARA TERHADAP PERTUMBUHAN DAN PERKEMBANGAN NEPENTHES MIRABILIS Mardhiana, Mardhiana; Parto, Yakup; Hayati, Renih; Priadi, Dwi Putro
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol 4, No 1 (2015): JLSO
Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (458.978 KB) | DOI: 10.33230/JLSO.4.1.2015.140

Abstract

The objective of this research was to study the effect of nutrient fertilization on the growth and development of nepenthes (Nepenthes mirabilis). The research was conducted from October 2011 until March 2012 at Sukarami village, Palembang, Indonesia. Factorial randomized block design with two treatment factors was applied. The first factor was NPK fertilizer dosage which consisted of three levels: Po = no fertilizer, P1 = 5 g, P2 = 10 g. The second factor was number of ants: S0 = none, S1 = 20, S2 = 40, S3 = 60. The results indicated that NPK fertilizer application of 5-10 g to the planting media could increase plant growth and development, particularly in plant height, stem girth, and leaf number of N. mirabilis. Giving 60 ants per plants into nepenthes pitcher could yield the largest pitcher number, 3-4 pitcher per plant. Combination of 5 g NPK and 20 ants, similarly, combination of 10 g NPK and 0 ants resulted in the largest leaf increment (10-11 leaves). Combination of 0 NPK and 60 ants resulted in the largest pitcher number (3-4 pitcher per plant).
KARAKTERISTIK DAN KEMELIMPAHAN NEPENTHES DI HABITAT MISKIN UNSUR HARA Mardhiana, Mardhiana; Parto, Yakup; Hayati, Renih; Priadi, Dwi Putro
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol 1, No 1 (2012)
Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (314.029 KB) | DOI: 10.33230/JLSO.1.1.2012.7

Abstract

Mardhiana et al., 2012. The Characteristics and Abundance of Nepenthes of Nutrient-poor Habitats. JLSO 1(1):50-56.This research aimed at assesing the characteristics and abundanceof Nepenthespopulation in nutrient-poor habitats. This study was conducted at two locations, Talang Kelapa village, Banyuasin Km 10, and Pasir Putih village, Sukajadi, Banyuasin Km 18. Observations were made on  the soil chemical and physical properties, morphology  and population abundance  of Nepenthes. The result showed  that N. mirabilis was the only species found in  Talang Kelapa and Pasir Putih.  Nepenthes upwere able to grow well in very poor soil nutrients. Natural habitat in Pasir Putih with sandy soil  and water log condition gave better effect on the morphology and abundance in than in Talang Kelapa with  clay soil and dry.  The ratio of  Nepenthes abundance in Pasir Putih to that in Talang Kelapa was 3:2. 
POTENSI EKSTRAK KARAMUNTING (MELASTOMA MALABATHRICUM L.) SEBAGAI INSEKTISIDA NABATI UNTUK MENGENDALIKAN ULAT GRAYAK (SPODOPTERA LITURA F.) Kartina, Kartina; Shulkipli, Shulkipli; Mardhiana, Mardhiana; Egra, Saat
Agrotekma: Jurnal Agroteknologi dan Ilmu Pertanian Vol 4, No 1 (2019): Agrotekma: Jurnal Agroteknologi dan Ilmu Pertanian, Desember
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (445.204 KB) | DOI: 10.31289/agr.v4i1.2806

Abstract

Spodoptera litura F. is one of the important pests in Horticulture commodities which can cause damage 80% and up to 100%. Karamunting (Melastome malabathricum) is a wild plant that grows in Tarakan City. This plant is known to contain secondary metabolites which are thought to have the potential to control pests. This study aims to determine the potential of Karamunting extract as a botanical insecticide material to control armyworms. This study uses a completely randomized design (CRD) method with 1 treatment factor, namely the concentration of Karamunting leaf extract. Potential extracts as botanical insecticides were tested by dye method using 4 concentrations, namely 0 (control); 500; 1000; 2000; 4000; and 8000 ppm. The results showed that Karamunting leaf extract was able to control armyworm pests. Giving extracts of 8000 ppm (P5) in feed caused the highest decrease in eating activity up to 41,2%, larval mortality up to 85%, and the highest mortality rate after 7 days of observation. Decreased feeding activity and larval mortality were thought to be influenced by the presence of phenol compounds, fatty acids, terpenoids, sterols and alkaloids identified in the extract. Thus, Karamunting leaf extract has the potential to be developed as an active ingredient in botanical insecticides to control armyworm.