KAJIAN PEMBERIAN SISA PENGGILINGAN PADI DAN PUPUK ORGANIK CAIR TERHADAP PERTUMBUHAN VEGETATIF TANAMAN SAWI HIJAU (Brassica juncea L.)

<p>Green mustard plants (Brassica rapa var. Parachinensis L.) are plants that have a source of vitamins and minerals. The purpose of this study was to determine the effect of the concentration of rice grinder and liquid organic fertilizer on the vegetative growth of mustard greens (Brassica juncea L.), to determine the effect of a mixture of Giving POC with plant growth on mustard plants and to determine the effect of a combination of POC and planting media mixture on the growth of mustard plants. This research was conducted in February to May 2020, Jalan Ekarasmi gg. ekanusa in the Kelurahan Gedung Johor, Medan Johor District, Medan City with a height of ± 30 m above sea level using a Random Factorial design consisting of 2 factors and 3 replications. The results showed that the POC concentration did not show a significant effect on plant height, number of leaves, leaf length, leaf width, leaf area, wet weight and chlorophyll of mustard plants, but visually the highest results were obtained at P2 treatment (30 cc / L water ) followed by P1 (15 cc / L water) and the lowest in P0 treatment (without POC), the planting media mixture showed a very significant effect on plant height at 7 and 14 HST and had no significant effect on all other observation variables. The highest yield was obtained in the treatment of M0 (Top Soil Soil) followed by M1 (Top Soil and Rice Husk Mixture) and M3 (Top Soil and Rice bran Mixture) and the lowest in M2 (Top Soil and Bran Soil) mixture, POC and the planting media mixture showed a very significant effect on the plant height variable at 14 HST and the amount of chlorophyll at harvest and had no significant effect on other variables. The best results were obtained on M3 P2 (Top Soil and Rice bran Mixture; P2 (POC concentration of 30 cc / L water).)</p><pre><em>Keywords: leftover rice mill, liquid organic fertilizer, mustard plant, vegetable pesticide.</em></pre>

IDENTIFIKASI BAKTERI PELARUT POSFAT PADA RIZOSFER UBI JALAR VARIETAS RANCING SELAMA FASE PERTUMBUHAN

<p class="StyleAuthorBold">Cilembu Sweet Potato is one type of sweet potato that is typical in the West Java area precisely in the Cilembu village or Sumedang. Cilembu sweet potato has a typical characteristic that is taste like honey if it fermentation and then roasted. Rizospheric bacteria with the ability of phosphate solvents are one of the factors supporting growth in plants. The research aims to identify Rhizosphere bacteria in Cilembu sweet potato roots which have the ability as phosphate solvents at two locations during the growth phase. The study was conducted with qualitative by testing the biochemical characteristics and ability of phosphate solvents. The result of this research show that Rhizosphere bacteria with the ability of phosphate solvents at the location of Cilembu (LCI) and Jatinangor (LJA) are not significantly different. In LCI, 12 isolates were obtained and in LJA 7 isolates were obtained. So that it can be concluded that the diversity of rhizosphere bacteria can be influenced by the characteristics of the soil and the growth phase.</p><p class="StyleAuthorBold"><strong>Keywords</strong>: Cilembu yam, Rizosphere bacteria, phosphate solvent</p>

UJI BAKTERI Escherichia coli PADA AIR SUNGAI PIAM DI KECAMATAN SIRAPIT KABUPATEN LANGKAT

This study aims to determine the presence of <em>Escherichia coli</em> bacterial contamination in Piam River Water. The method used in this study is to use the <em>Purpose Sampling</em> observation method with three station points and three replications and the results are read in the MPN table. The results showed that the presence of <em>Escherichia coli</em> bacterial contamination in Piam River water with the lowest MPN yield was 38 CFU and the highest was 1100 CFU. The average MPN value on <em>Escherichia coli</em> bacterial contamination at station 1 in the morning was 59 CFU and afternoon was 111 CFU. Station 2 in the morning 128 CFU and afternoon 303 CFU. And at station 3 in the morning 92 CFU and afternoon 886 CFU.

UJI AKTIVITAS EKSTRAK DAUN PIRDOT (Saurauia vulcani Korth) TERHADAP PERTUMBUHAN BAKTERI Bacillus subtilis

<p><a name="_Hlk26926554"></a><span>Pirdot is a plant that has been widely used by people to treat various diseases. Pirdot leaves extract contain of flavonoids which have antibacterial Substances. This research has a purpose to determine the activity of pirdot leaves extract (Saurauia vulcani Korth.) inhibit to<span> </span>bacterium Bacillus subtilis. This research uses an experimental method that are the maceration extraction method and testing the antibacterial activity by agar diffusion method. Result of the research was found that the inhibition area of pirdot leaves extract against Bacillus subtilis bacteria that have some clear zone<span> </span>were 8.66 mm, 9.43 mm, 9.90 mm, 10.97 mm and 11.66 mm. Pirdot leaves can inhibit the growth of Bacillus subtilis bacteria.</span></p><p><span><span>Keywords: Pirdot leaf, Bacillus subtilis, antibacterial.</span></span></p>