61 research outputs found
Pertumbuhan Dan Produksi Kedelai Varietas Anjasmoro Pada Tanah Salin
Increased soybean production is competing with the extension of the use of agricultural land for non- agricultural needs. Therefore the future expansion of agricultural land can only use marginal lands such as peatlands, wetlands and tidal lands. This paper discusses the growth and production of soybean varieties Anjasmoro in saline environments. Varieties Anjasmoro have total leaf area and the percentage ratio of the canopy which is not significantly different from the other varieties tested except Kipas Merah. In the production of components, seed weight Anjasmoro 100 seeds varieties including higher and statistically the same as the varieties Kipas Putih dan Kipas Mera
Status Dan Keanekaragaman Fungi Mikoriza Arbuskula (FMA) Pada Lahan Produktif Dan Lahan Non Produktif
Existence and status of the AMF is influenced by biotic and abiotic factors. This research aims to study and know the status and existence of Arbuscule Mycorrhizal Fungi (AMF) on the land productive and non productive land. Soil samples derived from the productive and non productive land in Tanjung Anom. This research uses the filter to get the spores and staining method to determine root colonization. Results showed that AMF colonization in productive land obtained 17.83% with an average density of 80 spores / 50g soil, and the percent of AMF colonization in non productive land obtained 42.76% with an average density of 89 spores / 50g soil. AMF spore types Glomus and Acaulospora on productive land obtained 13 spore types Glomus sp, and on non productive land obtained 14 spore types Glomus sp and 2 Acaulospora spore types. Total spore types were obtained 27 spore types, 25 types of spores Glomus sp and 2 Acaulospora sp spore types
Pengaruh Inokulasi Mikoriza Arbuskula Terhadap Pertumbuhan Bibit Tanaman Slow Growing (Glodokan Dan Tanjung
This research aims to find out the response or effect of arbuscular mycorrhizal inoculation on growth of slow growing plant. This research was conducted in the greenhouse of the Faculty of Agriculture, University of North Sumatra, Medan.This research uses completely randomized factorial design with 2 factors namely mycorrhizal doses (0 g / seed, 5 g / seed, 10 g / seed, and 15 g / seeds) and plant species (glodokan and tanjung). Parameters measured were plant height, plant diameter, leaf number, percentage of root colonization, P uptake, total dry weight, and short root ratio. The results showed the interaction between plant species and dose mycorrhizal not significantly affected all parameters of eachs treatment. Conversely single factor plant species showed significant effect on all parameters of each treatment, but to a single factor dose of mycorrhizal significant effect on the total dry weight and P uptake but no significant effect on the parameters of height, diameter, number of leaves, the ratio of the root crown and root colonization. Different types of plants will give a different response to growth
Aktivitas Mikroorganisme Pada Tanah Bekas Erupsi Gunung Sinabung Di Kabupaten Karo
Volcanic ash released when the eruption has an acidic pH, thus affecting the amount and activity of microorganisms in the soil. Therefore conducted this study to determine the activity of soil microorganisms in the former eruption of Mount Sinabung in Karo. Measurement of total soil microorganisms was done by Agar Cawan method, while the measurement of the activity of soil microorganisms was conducted jar and titrimetic method. The result of the research showed that the higher of the pH, the colony of microorganism will be much and the reverse. The higher of C- organic, the activity of micoorganism will be high within the soil, and the reverse. Respiration value on land affected by volcanic ash at a depth of 0-5 cm was 0,96. Respiration value on land affected by volcanic ash at a depth of 5-20 cm was 1,16. Respiration value on land that was not affected by volcanic ash was 1,52
Keanekaragaman Mikoriza Arbuskula (FMA) Pada Beberapa Tegakan Di Areal Arboretum Universitas Sumatera Utara
Existence and Status of Arbuscular Mycorrhizae Fungi is affected by biotic and abiotic factor. The goal of this research is to know diversity of Arbuskular Mycorrhiza Underneath of durian (Durio zibethinus), kemiri (Aleurithes moluccana), asam gelugur (Garcinia atroviridis), and karet (Hevea Brasiliensis). Soil sample has been taken from Arboretum Universitas Sumatera Utara under of four tree of MPTS. This research use soil separating method to obtain spores and root coloring method to find out root colonization. The obtained an average spore density on kemiri is 42 spores/50 g soil, durian is 42 spores/50 g soil, karet is 50 spores/50 g soil and asam gelugur is 62 spores/50 g soil. The result shows on four tree of MPTS obtained 23 spores types of Glomus and 8 spores types of Acaulospore with colonization percentage of durianis 25,6%, kemiri is 43,86%, Karet is 49,6% and Asam Gelugur is 50,5%
Keanekaragaman Fungi Mikoriza Arbuskula Pada Hutan Tri Dharma Universitas Sumatera Utara
The goal of this research is to know the diversity of Arbuscular Mycorrhizal Fungi on Tri Dharma Forest University of North Sumatra. The samples of soil and roots of plants taken from the land of Tri Dharma Forest University of North Sumatra. This research use soil separating method to obtain spores and root coloring method to find out root colonization.The results show that an increase in the average density of spores from the field on the results of trapping, for the percentage of Arbuscular Mycorrhizal Fungi colonization in the roots of plants at 56,5% include grade 4 or high categories. Found 2 genus, namely Genus Acaulospora and Genus Glomus. Of the field found as many as 20 types of spores by average spore density 27 spores/50 g soil and trapping results are found as many as 26 types of spores by average spore density 102 spores/50 g soil
Dampak Kebakaran HutanTerhadap Sifat Fisika Dan Sifat Kimia Tanah Di Kabupaten Samosir
Forest damage caused by forest fires could make a great harm. This result aims to determine the impact of forest fires on the physical and chemical properties of soil. The research was conducted in May-July 2014. The soil samples were taken in Samosir, North Sumatra. The method used on this result is zig-zag method. Soil analysis carried out in the Central Laboratory of the Faculty of Agriculture, University of North Sumatra. The results showed that forest fire is not give impact on the physical and chemical properties of soil,because of the type of fires are crown fire
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