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SIFAT BIOLOGI TANAH MINERAL MASAM DYSTRUDEPTS DI AREAL PIRINGAN KELAPA SAWIT YANG DIAPLIKASI MULSA ORGANIK Mucuna Bracteata DI LAHAN PERCOBAAN FAKULTAS PERTANIAN, UNIVERSITAS RIAU Zahara, Fitri; ', wawan; ', Wardati
Jurnal Online Mahasiswa (JOM) Bidang Pertanian Vol 2, No 2 (2015): Wisuda Oktober 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Pertanian

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The objectives of this research to determine the soil biological properties on the acidic mineral soil Dystrudepts in the area of disc palm oil applied of organic mulch Mucuna bracteata in the experimental garden of Agriculture Faculty, Riau University. Analysis of the soil biological was conducted in the Soil Laboratory of Agriculture Faculty, Riau University, in October 2014 to February 2015. Application of mulch organic M. bracteata used purposive random sampling method which consisting of 4 levels and 4 replications. The levels is M0 (0 kg /plant), M1 (15 kg /plant), M2 (30 kg /plant) and M3 (45 kg /plant). Parameter observed : calculate the amount of soil biota macrofauna, mesofauna and microorganism. Data were analyzed deskriptively statistically. The research showed application of organic mulch M. bracteata 45 kg/plant increased the amount of soil biota macrofauna, mesofauna and microorganism soil, in the area of disc palm oil. Keywords: Soil biological properties, Dystrudepts, Mucuna bracteata

PENGARUH PEMBERIAN DOSISKOMPOS Azolla microphylla TERHADAP BIBIT KAKAO (Theobroma cacao L) DI PEMBIBITAN Warni, Delta Nervi; ', Wawan; Khoiri, M. Amrul
Jurnal Online Mahasiswa (JOM) Bidang Pertanian Vol 2, No 2 (2015): Wisuda Oktober 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Pertanian

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This study aims to determine the influences of extending compost dosage of Azolla microphylla for Cocoa seedlings and determine the Azolla microphylla compost dosage which produces growth is the best nursery cocoa seedlings compost. This research was conducted in the experiment stationthe Faculty of Agriculture, University of Riau, Pekanbaru startied from November 2014 through April 2015. The research was conducted experimentally usingcompletely randomized design (CRD). The data were statistically analyzed using analysis of variance, followed by Duncan's New Multiple Range Test (DNMRT) at 5%. Parameters observed were plant height (cm), stem diameter (mm), number of leaves (pieces), leaf area (cmÂ²), seeds dry weight (g) and the ratio of crown roots (g). The results showed that application of Azolla microphylla compost on cocoa seedlings significantly affected stem diameter and has no significant effect against high seedling, number of leaves, leaf area,seed dry weight and root crown ratio, however there was an increasing trend in growth of high seedling, number of leaves, leaf area, the weight of dry seed and root crown ratio without the application of Azolla. microphylla compost. Keywords - cocoa seedlings, Azolla microphylla compost, dose.

SIFAT KIMIA TANAH DAN PERKEMBANGAN AKAR KELAPA SAWIT (Elaeis guineensis Jacq.) PADA BERBAGAI DIMENSI RORAK DENGAN PEMBERIAN TANDAN KOSONG Kurniawan, Eko; ', Ardian; ', Wawan
Jurnal Online Mahasiswa (JOM) Bidang Pertanian Vol 1, No 2 (2014): Wisuda Oktober 2014
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The development of the root system of plants are a reflection of the level of physical and chemical soil properties. Siltpit (rorak) is a conservation pit of a certain size and layout which systematically provide benefits for soil remediation. Empty Fruit Bunch (Tan-kos) used as an alternative of organic fertilizer and also contribute to the improvement of physical - chemical and biological properties of soil. The experiments were conducted with four treatments and 4 replications . Experiment arranged in Radomized Completely Block Design with treatment EFB applications 750 kg on the soil surface with dimension 3mx2m (T0); siltpit size 3 m x 0.66 m x 0.75 m + 750 kg EFB (T1); siltpit size 5 m x 0.6 m x 0.5 m + 750 kg EFB (T2) and siltpit size 5 m x 1 m x 0.3 m + 750 kg EFB (T3). T2 treatment gives the most influence on the increase in the CEC of 4.8 cmol / kg then T0 of 2.8 cmol / kg. Improvement P-dissolved is found in T3 4:06 ppm followed by T0 3.96 ppm, K-total increase 0.75 cmol/kg and K-available in 0.9 cmol/kg.T0 treatment effect significant difference in diameter, wet weight, dry weight and root length tertiary depth of I, II and III. While treatment pit + 750 kg EFB (T1,T2 and T3) did not significant impact and significantly influence on the treatment T2 in parameter tertiary root length of 27.93 mm in depth III. Key words : Siltpit, EFB, root development and soil properties.

EFEK TINGGI MUKA AIR TANAH DAN PEMUPUKAN TERHADAP EMISI CO2 PADA TANAH GAMBUT DENGAN SERASAH DAUN AKASIA (Acacia crassicarpa) Sianturi, Merry; ', Wawan; ', Wardati
Jurnal Online Mahasiswa (JOM) Bidang Pertanian Vol 1, No 2 (2014): Wisuda Oktober 2014
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Indonesia has the largest peatland among the tropical countries which are spread in Sumatra mainly in province of Riau, Kalimantan and Papua. This study aims to know the effect of water level and fertilization N, P, K on CO2 emissions in peatland with litter of akasia (Acacia crassicarpa). This research was conducted in the Screen House, Plant Laboratory Faculty of Agriculture, University of Riau, from July to December 2013. This research was conducted experimentally using completely randomized design (CRD) of non-factorial with 6 treatments and 3 replications. The data obtained were analyzed descriptively and then the data is presented in tabular form. Parameters observed were CO2 emissions. The results showed that the increase of water level depth from 30 cm to 90 cm without fertilizer and with fertilizer N, P, K increase CO2 emissions were observed in October. However, in November and December observation, CO2 emissions were obtained in each treatment is inconsistent comparing in Oktober observation. Treatment of water level with fertilizer N, P, K result in CO2 emissions lower than treatment without fertilizer. Key words: water level, fertilization and CO2 emissions

Pengaruh Pemberian Mulsa Organik Terhadap Sifat Fisik dan Kimia Tanah serta Pertumbuhan Akar Kelapa Sawit Antari, Rabisa; ', Wawan; Manurung, Gulat ME
Jurnal Online Mahasiswa (JOM) Bidang Pertanian Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
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Oil palm (Elaeis guineensis Jacq) is a multipurpose plant which occupies an important position generaly in agricultural sector and particularly in plantation sector. Bright prospects for palm oil commodity in the world encourage people to plant oil palm in acidic mineral soil, which could face some obstacles, on physical, chemical and biological soil properties. In the dry season, oil palm has the type of oil palm roots are shallow making it relatively less tolerant to drought. Because of these problems is an attempt to solve the problem in oil palm land by using organic mulch (oil palm empty fruit bunches, Calopogonium, palm midrib and ferns). This research has been carried out in the experimental farm of the Agriculture Faculty Riau University, from June to September 2012. The purpose of this study was to determine the effect of organic mulch on soil physical and chemical properties, as well as the root growth of palm oil using a randomized block design (RBD), that consists of 5 treatments and 3 replications. The results of this study shown that treated soil using organic mulch had the significant difference compare to soil without mulch in the whole observation parameters. Organic mulches can improve total pore space, C-organic, N-total, soil water content and soil temperature and decrease soil bulk density. It also, can increase the weight of the roots, root dry weight, root occupy and the plant root volume. Keywords: Organic Mulch, Soil Physical and Chemical Properties, Palm Oil

INVENTARISASI MAKROFAUNA TANAH DI BAWAH TEGAKAN KARET (Hevea brasiliensis) PADA LAHAN GAMBUT Saputra, Irawan Dede; ', Wawan; Amri, Al Ikhsan
Jurnal Online Mahasiswa (JOM) Bidang Pertanian Vol 3, No 1 (2016): Wisuda Februari 2016
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This research aimed to determine species of macrofauna and calculate population density of soil macrofauna understands of rubber plant in pet land in different ages. The research was conducted on 1 hectare area of peat land. It is divided in to two parts with ½ hectare 4 years rubber plant and ½ hectare 6 years rubber plant. The method that used is a survey method. Data was collected by purposive sampling. 9 plants samples were taken to each ages, and it get 18 plant samples. Soil sampling and soil macrofauna carried out in area 50 x 50 cm with depth 15 cm. The samples were taken around the plant samples (1 meter from the base of plant) and between plants (at rows). The method to collect of soil macrofauna by hand sortir method. Rubber plantations aged 6 years and 4 years have the same kind that are braid (Geophilomorpha), ants (Hymenoptera) and ground beetles (Coleoptera). Rubber plantations aged 6 years found 381 soil macrofauna more than rubber plantations aged 4 years found 289 soil macrofauna. Keywords: macrofauna, peat, rubber.

PENGARUH TINGGI MUKA AIR TANAH DAN UKURAN SERAT TANAH GAMBUT TERHADAP PERAKARAN DAN PERTUMBUHAN TANAMAN AKASIA (Acacia crassicarpa) Valentina, Risda; ', Wawan; ', Idwar
Jurnal Online Mahasiswa (JOM) Bidang Pertanian Vol 1, No 2 (2014): Wisuda Oktober 2014
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Indonesian has the widest peat land (15 million ha) among the tropical countries, which is about 3.867.413 ha is in the Riau Province. Peat land can be usefull to make an Industry Plant Forest (IPF). The water management of the peat land is the important key of the IPF progress in the peat land to be success. The aimed of this research was to investigate the effect of the height of water level and the peat land fiber size to the root system and the growth of Acacia (Acacia crassicarpa). This research was conducted for three months at the backyard of Soil Science Laboratory of University of Riau, Pekanbaru. This study used a completely randomized design which consisted of two factors. The first factor was the peat land fiber size that has two levels, D1 (size of soft fiber) and D2 (size of hard fiber). The second factor was the the height of water level with 3 levels, which was 25 cm, 50 cm and 75 cm. This study had six combinations with 3 replicates, so that was obtained 18 unit of experiments. The data was analyzed using ANOVA and tested further by DNMRT at the 5% of significant. The observed parameter is the soil subsidence and the plant such as root weight (g), root length (cm), root volume (ml), plant height (cm), stem weight (g), plant diameter (cm), leaf weight (cm), and plant biomass (g). The result showed that the root system and the plant growth influenced by the height of water surface and the peat land fiber size. Key words: Acacia crassicarpa, peat land fiber size, growth, root system, height of water surface.

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