PERTUMBUHAN TANAMAN SAWI (Brassica juncea L) DENGAN PERENDAMAN KOLKISIN

Brassica juncea is one of vegetable consumed by many people. One of chemical have been successful to induce mutation is colchicine. The aim of this research was to determine effect of colchicine on Brassica growth. The result show that soaking brassica seeds using colchicine make a decrease in the average plant height, leaf widht and number of leaves compare to control cause abnormal cell division.Keyword: Brassica juncea, Colchicine, Growth response

EFEK IRADIASI SINAR GAMMA PADA TANAMAN KACANG PENUTUP TANAH (Mucuna bracteata L.)

Legume cover crop (Mucuna bracteata L.) is a creeper which is currently often used to increase soil fertility in plantation areas. This plant is a leguminous plant that can fix nitrogen nutrients in the soil. One of the M.bracteata plant breeding programs to increase diversity is mutation using gamma ray radiation. The research objective was to determine the level of radiosensitivity of legume cover crop using gamma ray irradiation. The research was conducted at PAIR BATAN using a Gamma Chamber 4000A irradiator and in agricultural experiment, Labuhanbatu University. The plant material used was M.bracteata seeds with irradiation doses of 0, 200, 250, 300, 350 and 400 Gy. This study uses a curve fit analysis program to calculate the LD50 value (Lethal dose 50). The results showed that the plant radiosensitivity by calculating the LD50 value of M.bracteata at the age of 2 Weeks After Planting) was 348.737 Gy. The higher the radiation dose given, the lower the percentage of growth. Key words: diversity; leguminous; lethal dosage; mutation; gamma rays

ANALISA N, P, K PADA PUPUK ORGANIK CAIR LIMBAH AIR TAHU DAN IKAN TERI SETELAH DEKOMPOSISI 30 HARI

The aims of this study are to compare the feasibility of levels of Nitrogen, Phospor and Kallium liquid organic fertilizers resulting from anaerobic and aerobic, The results of 30 days of decomposition of organic waste made from raw water tofu and anchovy produce liquid organic fertilizer with levels of Nitrogen 0,30%, Phospor 0,18% and Kallium 0,10%. The Phospor content of liquid organic fertilizer produced from the decomposition of organic waste made from raw water tofu and anchovies has met the SNI 19-7030-2004 eligibility standards set by the ministry of agriculture so it is suitable for use on plants. Nitrogen and Kallium levels of liquid organic fertilizer obtained from the decomposition of organic waste made from water tofu, vegetables and fruit water with organic waste made from raw water tofu and anchovies not meet SNI 19-7030-2004 eligibility standards.Keywords: Nitrogen,Phospor,Kallium,Liqiud organic Fertilizers,SNI 19-7030-2004

EVALUASI KESESUAIAN LAHAN UNTUK TANAMAN KACANG TANAH DI KELURAHAN PARDAMEAN KECAMATAN RANTAU SELATAN

Land evaluation is useful as a basis for sector development in an area that is useful for reorganizing existing land use so as to assist in making land use planning decisions. Peanuts have great potential to be cultivated and developed commercially because they have wide adaptability, high productivity, are resistant to plant pests, and are more resistant to marginal conditions. This research is descriptive with survey methods. The sampling method used is based on land map units with a free grid system for data. climates classified by climate type Schmidt and Ferguson. The land evaluation was carried out using the matching method by matching and comparing land characteristics with land suitability class criteria so that to obtain land suitability classes for peanut plants in Rantau Selatan District, Labuhanbatu Regency, there were 6 sample points so that the determination of soil characteristics values for soil samples was carried out using a soil drill tool. at a depth of 0-60 cm. Research results for peanut plants in Pardamean Village, Rantau Selatan District according to marginal / S3. Land suitability for peanut plants cultivated in Rantau Selatan District Labuhanbatu Regency 2.017 ha. The actual land suitability class for peanut plants is Nwa, while the potential land suitability class is S2tcwa.Keywords: Land Evaluation, Peanut Plants, Rantau Selatan, Labuhanbatu

ANALISIS FAKTOR YANG MEMPENGARUHI PERMINTAAN CABAI MERAH (Capsicum annum L) DI KABUPATEN LABUHANBATU

Red chili (Capsicum annum L) is a type of horticultural vegetable that is widely cultivated in Indonesia. Red chilies have a high price and this plant is very beneficial for health. One of them is controlling cancer. This study aims to determine the analysis of the factors that influence the demand for red chili in Labuhanbatu Regency. The analytical method used in this research is multiple linear regression analysis, classical assumption test and statistical test. The results of the study based on the t test that the price has a positive effect on the demand for chili peppers in Labuhanbatu Regency, the tcount value is 2.417 with a significance level of 0.002 and the population has a significant effect on the demand for chili in Labuhanbatu Regency, the tcount value is 3.298 and a significance level is 0.001.

ISOLATION AND CHARACTERISTICS OF PHOSPHATE SOLUBILZING BACTERIA (PSB) FROM VEGETATIVE AND GENERATIVE PHASE OF MAIZE RHIZOSPHERE

The plants acquire phosporus from soil solution as phosphate anion. The availability of nutrients is very low in soil and crops compared to the other macronutriens. It precipitates in soil as orthophosphate or absorbed by Al and Fe so that inhibiting the plant growth. Phosphate solubilizing bacteria are able to release the P bond of clay minerals and provide it for crops. The research aimed to get phosphate solubilzing microbes from maize (Zea mays L.) rhizosphere. The soil samples were taken from the maize rhizosphere in both the vegetative and generative phases in the Cikabayan Bogor experimental farm. The phosphate solubilzing bacteria were determined for its ability to dissolve phosphate in liquid Pikovskaya media. The results of research were obtained 16 phosphate solubilizing bacteria, each of the 12 isolates derived from maize rhizosphere in vegetative phase (JM FIO) and 4 isolates in generative phase (JT FIO). The phosphate solubiliton index of each phosphate solubilizing bacteria was varied, namely 2,2-4, the largest dissolution index obtained at JM FIO 1. The largest phosphate dissolving ability in liquid Pikovskaya media was showed by JM FIO 3 isolate, P value was 0,60 ppm or increased 300% of control then followed by JM FIO 9 with 0,43 ppm P. The research also showed that JM FIO 3 and JM FIO 9 were not pathogenic and potentially could be used as biological fertilizer with number of cells at each 4.2 x 109 and 1.2 x 109 CFU/g of carrier.Key Words : Phosphate Solubilizing Microbe, Maize, Rhizosphere

Growth Response of Red Spinach (Amaranthus Gangeticus) by Giving Cow Manure and Rice Husk Ash.

The increase in market demand red spinach (Amaranthus Gangeticus) makes the prospects very promising less than optimal for the growth of red spinach (Amaranthus Gangeticus) because soil fertility is low so that the provision of organic material can improve soil fertility through the improvement of the physical, chemical, and biological soil so that it can support the growth of red spinach. This study aims to determine the dose of manure, the dosage of rice husk ash as well as the interaction of dosage that is optimal for the growth and yield of red spinach.this research was conducted experimental farm of the faculty of science and technology with a height of 28 meters above sea level Labuhanbatu district in March to October 2020. Research design using group factorial consisting of two factors. The first factor, namely the granting of cow manure (L) with three levels, namely : L0 = 0 ton/ha (control) L1 = 2 ton/ha, equivalent to 200 g/m2 (the recommended dose), L2 = 4 ton/ha, equivalent to 400 g/m2, L3 = 6 ton/ha, equivalent to 600 g/m2. The second factor, rice husk ash (A) consists of 4 levels, namely : A0 = 0 ton/ha (control), A1 = 1 ton/ha equivalent to 50 g/m2 (the recommended dose), A2 = 1.5 tons/ha, equivalent to 75 g/m2.The Parameters measured were plant height (cm), number of leaves (strands), Weight per Plant Sample (g). The results showed that the administration of cow manure 4 ton/ha, equivalent to 400 g/m2 can increase plant height, leaf number, and weight per Plant of amaranth red. The provision of 1.5 tons/ha, equivalent to 75 g/m2 can increase plant height, the number of leaves plant red spinach (Amaranthus Gangeticus).Keywords: Rice Husk Ash, Red Spinach, Cow Manure, Plant Growth

PERUBAHAN KONDISI FISIK BUAH KOPI (Coffea sp) SETELAH DISIMPAN SELAMA 1 BULAN

umatera Barat merupakan provinsi penghasil kopi di Indonesia. Luas areal perkebunan kopi pada tahun 2016 sampai 2018 yakni 38.365 Ha; 33.276 Ha; dan 34.024 ha dengan produksi 22.721 ton; 17.553 ton; dan 18.026 ton. Buah kopi harus ditangani secara cepat menjadi bentuk yang lebih stabil agar aman untuk disimpan dalam jangka waktu tertentu. Kriteria mutu biji yang meliputi aspek fisik, cita rasa dan kebersihan serta aspek keseragaman dan konsistensi sangat ditentukan oleh perlakuan pada setiap tahapan proses produksinya. Penelitian ini dilaksanakan di Laboratorium Teknologi Benih Fakulltas Pertanian Universitas Andalas dari bulan Agustus 2020. Pelaksanaan penelitian ini digunakan bahan antara lain benih kopi robusta yang diambil di daerah solok, Alat yang digunakan dalam penelitian ini adalah meteran, botol-botol plastik, pisau, timbangan analitik, beaker glass, gunting, karung goni, ember, kamera, sarung tangan, masker dan alat tulis. Penelitian ini dilakukan secara deskriptif yakni mengambil beberapa sampel buah tanaman kopi robusta dan mengamati perubahan fisik dari buah yang diambil secara random disuatu areal perkebunan kopi robusta. Berdasarkan pengamatan yang dilakukan terkait dengan kondisi penyimpanan buah kopi selama sebulan didapatkan perubahannya yakni, waktu setelah dipanen didapatkan kondisi buah kopi merah terang, kulit segar mulus dan lunak, lalu disimpan selama 7 hari didapatkan kondisi merah gelap kulit sedikit keriput, disimpan selama 14 hari dengan kondisi merah gelap dan kulit keriput jelas, disimpan selama 21 hari didapat warna hitam kecoklatan, kulit kaku dan keras dan setelah disimpan selama 30 hari didapat warna kulit buah kopi hitam, kulit kaku dan keras. Kata Kunci: Respirasi, Kulit Buah, Warna Buah

RESPON PERTUMBUHAN SAGU (Metroxylon sagu Rottb) DENGAN PERENDAMAN ZAT PENGATUR TUMBUH IBA

Sago is a plant produces high carbohydrate source. The problem of sagoo propagation by generative are limited number of seeds and low germination. Vegetative propagation of sago can be done through sago tillers, however, the very slow root growth will affect the ability of the sago to survive. One way to accelerate root growth is by administering IBA growth regulators. This study aims to determine the response to the growth of sago saplings by immersing IBA (0, 25, 50, 75) ppm. The results showed that the highest percentage of living plants was found in the 25 ppm IBA immersion treatment with the percentage of live tillers 88.89%. For the parameters of the number and length of roots and the highest plant height was also found in the 25 ppm IBA immersion treatment with an average number of roots of 6.7, 12.43 cm of root length and an average plant height of 49 cm.

PENGARUH KETINGGIAN PERANGKAP FEROMON DALAM MENGENDALIKAN KUMBANG TANDUK (Oryctes rhinoceros L.) DI PERKEBUNAN PT HERFINTA

Penelitian ini dilaksanakan di perkebunan kelapa sawit PT. Herfinta Farm & Plantion Desa Tanjung Medan Kecamatan kampung rakyat Kabupaten Labuhan Batu Selatan Sumatera utara. Penelitian dilaksanakan pada bulan mei sampai juni 2020. Dilakukan pengamatan jumlah dari kumbang tanduk yang terperangkap. Jumlah kumbang terperangkap yang tertinggi diperoleh Kumbang Jantan pada perlakuan P4 2,5 m yaitu 1031 kumbang, sedangkan jumlah kumbang pada P3 2 m yaitu 659 kumbang, kemudian sedangkan jumlah kumbang pada P2 1,5 m yaitu 308 kumbang sedangkan jumlah kumbang tanpa perlakuan P1 (Kontrol) yaitu 75 Kumbang.