17 research outputs found
Analisis Unsur Logam Merkuri (Hg) dan Timbal (Pb) yang Terdapat pada Air dan Sedimen Sungai Sekitar Pertambangan Emas di Sumatera Utara (Batang Toru)
No full textResearch has been carried out on the analysis of Mercury (Hg) and Lead (Pb) metals
in rivers around gold mining in North Sumatra (Batang Toru). The purpose of this
study was to analyze the heavy metal content of Mercury (Hg) and Lead (Pb) in
water and sediment in rivers around gold mining in North Sumatra (Batang Toru).
Water and sediment samples were taken from twelve stations around the gold mining
river in North Sumatra (Batang toru). Determination of analysis of Mercury and
Lead Metals in water and sediments were carried out using Atomic Absorption
Spectroscopy (AAS). Pollution status was determined by the level of Hg and Pb in
water and sediment samples. The results showed that the highest levels of mercury
(Hg) in water and sediment were the highest from several stations, namely Water:
1.0482 ppb and Sediment: 1.1864 ppb. While the levels of Lead (Pb) heavy metals in
water are 0.6849 ppb and in sediments are 0.9917 ppb. This study found high levels
found in sediments.Telah dilakukan penelitian tentang analisis logam Merkuri (Hg) dan Timbal (Pb) di
sungai sekitar pertambangan emas di Sumatera Utara (Batang Toru). Tujuan dari
penelitian ini adalah menganalisis kandungan logam berat Merkuri (Hg) dan Timbal
(Pb) pada air dan sedimen di sungai sekitar pertambangan emas di Sumatera Utara
(Batang Toru). Sampel air dan sedimen diambil dari dua belas stasiun di sekitar
sungai pertambangan emas di Sumatera Utara (Batang toru). Penentuan analisa
Logam Merkuri dan Timbal dalam air dan sedimen dilakukan dengan menggunakan
Atomic Absorption Spectroscopy (AAS). Status polusi ditentukan melalui besarnya
kadar Hg dan Pb dalam sampel air dan sedimen. Hasil penelitian menunjukkan
bahwa perbedaan kadar Merkuri (Hg) pada air dan sedimen yang paling tinggi dari
beberapa stasiun yaitu Air : 1.0482 ppb dan Sedimen : 1.1864 ppb. Sedangkan kadar
logam berat Timbal (Pb) pada air 0.6849 ppb dan pada sedimen 0.9917 ppb.
Penelitian ini ditemukan kadar yang tinggi terdapat pada sedimen.79 HalamanTesis Magiste
Pengaruh aplikasi pupuk hayati mikoriza dan pupuk fosfor terhadap produksi tanaman kedelai (Glycine max L. Meriil)
Get PDFThis study aims to determine the production of soybeans with the application of mycorrhizal biological fertilizers and P fertilizers on the production of soybeans (Glycine max L. Meriil). This experiment was carried out at the Experimental Garden of the Faculty of Agriculture, Indonesian Methodist University, from August–October 2018. This study used a Randomized Block Design (RAK) consisting of Mycorrhiza (M) namely M0: 0 g/plant (control); M1: 5 g/plant; M2: 10 g/plant; M3: 15g/plant and Fertilizer (P), namely P0: 0 g/plant (control); P1:0.25 g/plant; P2: 0.5 g/plant; P3: 0.75 g/plant. All treatment combinations were 12 combinations and each treatment combination was repeated 3 times. Variables observed in this study include: flowering age (days); seed production per sample (g); seed production per plot (g); dry weight of 100 seeds (g). The experimental results showed that the interaction between mycorrhizal application and application of NPK fertilizer had a significant effect on seed production per sample, seed production per plot, dry weight of 100 seeds and not significantly different with flowering age. The highest seed production per sample was found in the M3P3 treatment of 26.32 g, the highest seed production per plot was found in the M3P2 treatment of 161.80 g and the highest dry weight of 100 seeds was found in the M3P3 treatment of 25.60 g. The mycorrhizal biofertilizer application treatment showed that the fastest flowering time was found in the M3 treatment, namely 36.58 days and 36.92 days in the P (P3) fertilizer treatment.Penelitian ini bertujuan untuk mengetahui produksi tanaman kedelai dengan aplikasi pupuk hayati mikoriza dan pupuk fosfor terhadap produksi tanaman kedelai (Glycine max L. Meriil). Percobaan ini dilaksanakan di Kebun Percobaan Fakultas Pertanian, Universitas Methodist Indonesia, dari bulan Agustus–Oktober 2018. Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) yang terdiri dari dosis mikoriza (M) yaitu M0: 0 g/tanaman (kontrol); M1: 5 g/tanaman; M2: 10 g/tanaman; M3: 15g/tanaman dan Pupuk P (P) yaitu P0: 0 g/tanaman (kontrol); P1:0,25 g/tanaman; P2: 0,5 g/tanaman; P3: 0,75 g/tanaman. Seluruh kombinasi perlakuan adalah sebanyak 12 kombinasi dan tiap kombinasi perlakuan diulang sebanyak 3 kali. Peubah amatan yang dilakukan dalam penelitian ini antara lain: umur berbunga (hari); produksi biji per sampel (g); produksi biji per plot (g); bobot kering 100 biji (g). Hasil percobaan menunjukkan bahwa Interaksi antara aplikasi mikoriza dan pemberian pupuk NPK berpengaruh nyata pada produksi biji per sampel, produksi biji per plot, bobot kering 100 biji dan berbeda tidak nyata dengan umur berbunga. Produksi biji per sampel tertinggi terdapat pada perlakuan M3P3 sebesar 26,32 g, produksi biji per plot tertinggi terdapat pada perlakuan M3P2 sebesar 161,80 g dan bobot kering 100 biji tertinggi terdapat pada perlakuan M3P3 sebesar 25,60 g. Perlakuan aplikasi pupuk hayati mikoriza menunjukkan waktu tercepat berbunga terdapat pada perlakuan M3 yaitu 36,58 hari dan 36,92 hari pada perlakuan pupuk P (P3)
Perendaman Benih Mucuna (Mucuna bracteata) Pada Suhu Air Yang Berbeda Dalam Percepatan Perkecambahan Benih
No full textGenerative propagation of Mucuna bracteata is complicated and requires special treatment to germinate. Mucuna has a thick, rigid, and impermeable seed coat, which becomes a mechanical barrier to water or gas entry, making the imbibition process challenging to occur. Breaking dormancy in mucuna seeds aims to increase germination. This study aims to determine the effect of soaking time for mucuna seeds (Mucuna bracteata) at different water temperatures on breaking dormancy. This study used a completely randomized design factorial. This study consists of 2 treatment factors. The first factor is the length of soaking (L), which consists of 3 levels: 30 minutes, 60 minutes and 90 minutes. The second factor is water temperature (K), which consists of 3 levels: 30 °C, 60 °C and 90 °C. Data analysis used variance analysis and simple regression analysis. The results of the study showed that water temperature had a significant effect on increasing germination power, accelerating germination, increasing the number of normal sprouts, and the dry weight of mucuna (Mucuna bracteata) sprouts..Perbanyakan Mucuna bracteata secara generatif sangat sulit dilakukan dan memerlukan perlakuan khusus untuk berkecambah. Mucuna memiliki kulit biji yang tebal, keras dan kedap yang menjadi penghalang mekanis masuknya air atau gas sehingga proses imbibisi sulit terjadi. Pematahan dormansi pada biji mucuna bertujuan untuk meningkatkan daya berkecambah. Penelitian ini bertujuan untuk mengetahui pengaruh lama perendaman benih mucuna (Mucuna bracteata) pada suhu air yang berbeda terhadap pematahan dormansi. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) faktorial. Penelitian ini terdiri dari 2 faktor perlakuan. Faktor pertama adalah lama perendaman (L) yang terdiri dari 3 taraf yaitu: L1 = 30 menit, L2 = 60 menit dan L3 = 90 menit. Faktor kedua adalah suhu air (K) terdiri dari 3 taraf yaitu: S1 = 30°C, S2 = 60°C dan S3 = 90°C. Analisis data menggunakan analisis sidik ragam dan uji Duncan. Hasil penelitian menunjukkan bahwa suhu air berpengaruh nyata terhadap daya kecambah, lama perkecambahan, jumlah kecambah normal, dan bobot kering kecambah mucuna (Mucuna bracteata).
Kata Kunci: Perendaman benih, suhu air, benih mucun
PENGARUH PEMBERIAN PUPUK KANDANG AYAM DAN PENGAPURAN TERHADAP PERTUMBUHAN DAN PRODUKSI TANAMAN JAGUNG MANIS (Zea mays saccharata sturt) DI TANAH ULTISOL
Get PDFThis research aims to determine the effect of applying chicken manure and liming on the growth and production of sweet corn (Zea mays saccharatasturt) in ultisol soil. This research was carried out on Jln. Simalingkar B. Sluice Gate IV, IDI Raya I Complex no. 52, Medan Johor District, Kel. Kwala Berkala with an altitude of ± 30 above sea level. This research used a factorial randomized block design (RAK) with 2 treatment factors, namely the type of chicken manure and liming which was repeated 3 times. The first factor in giving chicken manure (A) consists of 4 levels, namely: A0 = no manure (control), A1 = 2 kg/plot (10 tons/ha), A2 = 3 kg/plot (15 tons/ha) and A3 = 4 kg/plot (20 tons/ha). The second factor is the liming dose (P) consisting of 4 levels, namely: P0 = without liming (control), P1 = 200 g/plot (2 tons/ha), P2 = 300 g/plot (3 tons/ha) and P3 = 400 g/plot (4 tons/ha). The results showed that the dose of chicken manure had a significant effect on plant height, stem diameter and number of leaves. Liming has a significant effect on plant height, stem diameter and number of leaves. The interaction of chicken manure dose and liming had no significant effect on plant height, stem diameter, and number of leaves. Key words: manure, liming and sweet corn INTISARIPenelitian ini bertujuan untuk mengetahui pengaruh pemberian pupuk kandang ayam dan pengapuran terhadap pertumbuhan dan produksi tanaman jagung manis (Zea mays saccharatasturt) di tanah ultisol. Penelitian ini dilaksanakan di Jln. Simalingkar B. Pintu Air IV, Komplek IDI Raya I no.52, Kec Medan Johor, Kel.Kwala Berkala dengan ketinggian tempat ±30 dpl. Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) Faktorial dengan 2 faktor perlakuan, yaitu jenis pupuk kandang ayam dan pengapuran yang diulang 3 kali. Faktor pertama pemberian pupuk kandang ayam (A) terdiri dari 4 taraf, yaitu : A0 = tanpa pupuk kandang (kontrol), A1 = 2 kg/plot (10 ton/ha), A2 = 3 kg/plot (15 ton/ha) dan A3 = 4 kg/plot (20 ton/ha). Faktor kedua adalah dosis Pengapuran (P) terdiri dari 4 taraf, yaitu: P0 = tanpa pengapuran (kontrol), P1 = 200 g/plot (2 ton/ha), P2 = 300 g/plot (3 ton/ha) dan P3 = 400 g/plot (4 ton/ha). Hasil penelitian menunjukkan bahwa dosis pupuk kandang ayam berpengaruh nyata terhadap tinggi tanaman, diameter batang, dan jumlah daun. Pengapuran berpengaruh nyata terhadap tinggi tanaman, diameter batang, dan jumlah daun. Interaksi dosis pupuk kandang ayam dan pengapuran berpengaruh tidak nyata terhadap tinggi tanaman, diameter batang, jumlah daun. Kata kunci : pupuk kandang, pengapuran dan jagung mani
Pematahan Dormansi Biji Tanaman Aren (Arenga pinnata Merr.) secara Fisik dan Kimia
No full textTujuan penelitian ini untuk mengetahui pengaruh dari perlakuan fisik dan kimia terhadap pematahan dormansi benih aren. Penelitian ini dilaksanakan di lahan percobaan, Fakultas Pertanian, Universitas Methodist Indonesia, Medan pada Desember 2019 sampai Maret 2020. Penelitian ini menggunakan Rancangan Acak Kelompok non-faktorial dengan faktor A1= perendaman 20% H2SO4; A2= perendaman 20% KNO3; A3= penyayatan benih; A4= pengikiran benih dan lima ulangan. Data dianalisis menggunakan ANOVA dan dilanjutkan uji Beda Nyata Jujur (BNJ) pada taraf 5%. Hasil penelitian menunjukkan perendaman KNO3 konsentrasi 20% signifikan meningkatkan daya kecambah, bobot basah dan kering kecambah tanaman aren tertinggi dibandingkan pematahan dormansi lainnya
Optimization of Drying Time and Eco Enzyme Concentration on Shallot Production (Allium cepa L.)
Get PDFEco enzyme is a complex solution derived from the fermentation of organic matter, characterized by a light to dark brown color and a fresh, sour aroma. Fermentation yields environmentally friendly enzymes and other functional components beneficial for agriculture. Eco enzymes offer various advantages for shallot plants, including enhanced growth and increased shallot production. This study aims to investigate the effects of watering frequency and Eco enzyme concentration on the growth and yield of shallots (Allium cepa L.). A randomized block design (RBD) was employed, incorporating two treatment factors: the watering timing and the eco enzyme concentration. The treatment factors are as follows: Factor I, Watering Time (W), consists of three treatment levels: 1 time per day, 1 time every two days, and 1 time every three days. Factor II, Concentration of Eco Enzyme (E), includes three treatment levels: 0.8 ml per 240 ml of water per plant, 1.6 ml per 240 ml of water per plant, and 2.4 ml per 240 ml of water per plant. The observed variables in this study were the number of tubers per sample (cloves), the fresh weight of tubers per sample (grams), and root length (centimeters). The results indicated that both the timing of watering and the application of eco-enzyme concentrations significantly affected the number of tubers per sample, the fresh weight of tubers per sample, and root length
The Effect of NASA Liquid Organic Fertilizer and Chicken Manure on the Growth of Sweet Corn Plants (Zea mays saccharata Sturt)
No full textThis research aims to determine the effect of a combination of NASA POC and chicken manure on the growth and production of sweet corn (Zea mays saccharata Sturt). The research used a Randomized Group Design (RAK) with two treatment factors. The first factor is the administration of NASA Liquid Organic Fertilizer (A) consisting of 4 treatment levels, namely: A0 = 0 ml/liter of water (control), A1 = 2 ml/liter of water, A2 = 4 ml/liter of water and A3 = 6 ml /liter of water. The second factor is the provision of chicken manure (B) consisting of 3 treatment levels, namely: B1 = 2.25 kg/plot (7.5 tons/ha), B2 = 4.50 kg/plot (15 tons/ha) and B3 = 6.75 kg/plot (22.5 tons/ha). The results showed that giving NASA POC up to 6 ml/l of water significantly increased plant height, ear length, ear weight per plot and total dissolved solids. Providing chicken manure up to 6.75 kg/plot significantly increased plant height, ear length, weight per plot and total soluble solids. The interaction between NASA POC and chicken manure did not significantly affect plant height, ear length, weight per plot, or total dissolved solids
Mempercepat Perkecambahan Benih Asam Jawa (Tamarindus indica Linn) Menggunakan Metode Perendaman
No full text
ABSTRACT
Tamarind constitutes orthodox seed which is impermeable to water so that it is difficult to be penetrated by water in its imbibitions process. Consequently, the seeds have longer dormancy time so that special treatment is needed to accelerate its seed development. This research was done by soaking the seeds in the PGPR solution with the concentration and the soaking duration which are different from the purpose in order to accelerate the tamarind seed germination of the tamarind. The research used RAL (complete random sampling) consisted of soaking time (L) – L1: 2 hours, L2: 4 hours, L3: 6 hours, and PGPR concentration (P) which was Po; without PGPR concentration (control), P1: 10 ml/L of water, P2: 20 ml/L of water, and P3: 30 ml/L of water. The combination of treatment was 12 combinations, and each of them was repeated 3 times. The tamarind seeds were soaked according to the treatment, dried up, and germinated. The result of the research showed that germinating the seeds in 6 hours with PGPR concentration of 30 ml/L of water could accelerate the seeds until 4 days, 100% of sprouting power, 2.5% of vigor index, and 1% of germination rate.
Keywords: Tamarind, PGPR, Seed SoakingABSTRAK
Asam Jawa termasuk benih ortodok yang memiliki kulit benih yang bersifat impermeabel sehingga benih sulit untuk ditembus oleh air pada saat proses imbibisi terjadi, sehingga benih memiliki masa dormansi yang lebih lama dan dibutuhkan suatu perlakuan khusus untuk mempercepat perkecambahan benih. Penelitian ini dilakukan dengan perlakuan perendaman benih pada larutan PGPR dengan konsentrasi dan lama perendaman yang berbeda dengan tujuan untuk mempercepat perkecambahan benih asam jawa sehingga waktu yang dibutuhkan untuk mengecambahkan benih bisa lebih cepat. Metode Penelitian yang digunakan adalah dengan menggunakan Rancangan Acak Lengkap (RAL) yang terdiri dari Lama Perendaman (L) yaitu L1: 2 jam; L2: 4 jam; L3: 6 jam dan Konsentrasi PGPR (P) yaitu P0: Tanpa konsentrasi PGPR (kontrol); P1: 10 ml/L air; P2: 20 ml/L air dan P3: 30 ml/L air. Seluruh kombinasi perlakuan adalah sebanyak 12 kombinasi dan tiap kombinasi perlakuan diulang sebanyak 3 kali. Benih asam Jawa direndam sesuai dengan perlakuan dan dikeringanginkan kemudian dikecambahkan. Hasil penelitian menunjukkan bahwa perendaman benih hingga 6 jam dengan konsentrasi PGPR hingga 30 ml/L air dapat mempercepat perkecambahan benih hingga 4 hst, daya kecambah 100%, indeks vigor 2.5 %, Indeks Kecepatan Perkecambahan (%) 1%.
Kata Kunci : Asam Jawa, PGPR, perendaman benih
 
Effect of Fruit Pruning and Potassium Application on Growth and Production of Strawberry (Fragaria chiloensis).
Get PDFThis study aims to determine the effect of fruit pruning and application of Potassium on the growth and production of strawberry plants (Fragaria chiolensis). This study used a randomized block design (RBD) with 2 factors. The first factor was fruit pruning consisting of 4 levels: P0 = No pruning, P1 = 1 pruning, P2 = 2 pruning, P3 = 3 pruning. The second factor is Potassium fertilizer consisting of 4 levels: K0 = 0 g/plant, K1 = 2 g/plant, K2 = 4 g/plant, K3 = 6 g/plant. The observed variables were plant height (cm), flowering age (days), Fruit Weight (g), Fruit Volume (cm3), Sugar Content (%), Plant Wet Weight (g), and Plant Dry Weight (g). The results showed that pruning three fruits/plant increased plant height, fruit weight, fruit volume, sugar content, fresh weight and dry weight. Applying potassium fertilizer up to a dose of 6 g/plant can increase plant height, flowering time, fruit weight, fruit volume, sugar content, and wet and dry weight. Meanwhile, the interaction between fruit pruning and potassium application had no significant effect on all observed parameters.This study aims to determine the effect of fruit pruning and the application of Potassium on the growth and production of strawberry plants (Fragaria chiolensis). This study used a randomized block design (RBD) with two factors. The first factor was fruit pruning consisting of 4 levels: P0 = No pruning, P1 = 1 pruning, P2 = 2 pruning, P3 = 3 pruning. The second factor is Potassium fertilizer consisting of 4 levels: K0 = 0 g/plant, K1 = 2 g/plant, K2 = 4 g/plant, and K3 = 6 g/plant. The results showed that pruning 3 fruits/plant increased plant height, fruit weight, fruit volume, sugar content, fresh weight, and dry weight. Applying potassium fertilizer up to a dose of 6 g/plant can increase plant height, flowering time, fruit weight, fruit volume, sugar content, wet weight, and dry weight. The interaction between fruit pruning and potassium application had no significant effect on all observed parameters
Response of Growth and Production of Shallots (Alium cepa L.) to Planting Spacing and Watering Time Eco Enzyme:
No full textThis research was conducted on the land of UPT Tanjung Selamat Main Seed Center, Deli Serdang, North Sumatra Province, with an elevation of ±25 meters above sea level. This research was conducted from February to May 2022. The purpose of this study was to determine the exact spacing and timing of Eco Enzyme watering on the growth and production of shallots (Allium cepa L.). This study used a factorial randomized block design (RBD). Factor 1 is the spacing consisting of: J1=15cm x 15cm, J2=20cm x 15cm, J3=25cm x 15cm. Factor 2 namely: Eco Enzyme Watering Time consisting of: W1=1x1 day, W2=1x2 days, W3=1x3 days. The results of the study showed that the spacing treatment had a significant effect on shoot age, root length, tuber/sample diameter, and tuber/sample dry weight. From the results of the study it was also found that J2 and J3 had the fastest germination age (2.37 days) when compared to treatment J1 (2.67 days), the highest root length was in treatment J3 (14.92 cm) and the lowest was in treatment J1 (13.22 cm), diameter The largest tuber/sample was in treatment J3 (20.38 mm) and the lowest was in treatment J1 (18.11 mm) and the highest tuber/sample dry weight was in treatment J3 (66.68 g) and the smallest was in treatment J1 (52.06 g).ABSTRACT
This research was conducted at the Experimental Field of the Faculty of Agriculture, Universitas Methodist Indonesia, Harmonika Baru Street, Medan Selayang District, with an altitude of ± 27 meters above sea level. This research was conducted from February to May 2022. The aim of this study was to determine the effect of spacing and timing of Eco Enzyme watering on the growth and production of shallots (Allium cepa L.). This study used a randomized block design (RBD) using 2 treatment factors. The first factor is the spacing consisting of 3 levels, namely: J1 = 15cm x 15cm, J2 = 20cm x 15cm, J3 = 25cm x 15cm. The second factor is Eco Enzyme Watering Time consisting of 3 levels, namely: W1 = 1x1 day, W2 = 1x2 days, W3 = 1x3 days. The results showed that plant spacing had a significant effect on sprouting age, root length, tuber diameter/sample, and tuber/sample dry weight. From the treatment results it was found that J2 and J3 had the fastest germination age (2.37 days) when compared to treatment J1 (2.67 days), the highest root length was in treatment J3 (14.92 cm) and the lowest was in treatment J1 (13.22 cm), the largest tuber diameter / sample was in treatment J3 (20.38 mm) and the lowest was in treatment J1 (18.11 mm) and The highest tuber dry weight / sample was in treatment J3 (66.68 g) and the lowest was in treatment J1 (52.06 g).
Keywords: planting spacing, eco enzyme, shallots
