32 research outputs found
Effect of Fertilization on the Growth and Biomass of Acacia mangium and Eucalyptus hybrid (E. grandis x E. pellita)
Get PDFEffect of fertilization on the growth and biomass of Acacia mangium and Eucalyptus hybrid (E. grandis x E. pellita) on third rotation is still not well understood to support judicious application in large scale forest plantations. A field experiment aimed at understanding these questions was conducted in PT. Riau Andalan Pulp and Paper forest concession in Riau during 2011 to 2013. The experiment consisted of 2 trials based on species, each was arranged in a Randomized Completely Block Design with 5 replicates. Treatments for A. mangium were zero fertilizer, 23 and 70 kg P ha-1 and for E. hybrid zero fertilizer, 70 and 210 kg N ha-1. Biomass at 24 months was estimated using allometric equations with diameter at breast height (DBH) as predictor. Significant effects are: increased DBH and stand volume of both species and height of E. hybrid. Increased aboveground and root biomass, but decreased root:shoot ratio (R:S) of both species. There was no significant effect of luxury rates of P or N on all parameters in each species. Stem was the biomass component most increased by fertilization resulting in proportional changes in other components except bark. Fertilization increased total leaf area, leaf specific area and stem growth efficiency of both species. Luxury fertilizer rates reduced fertilizer efficiency in both species. [How to Cite: Siregar STH, Wawan and Adiwirman. 2015. Effect of Fertilization on the Growth and Biomass of Acacia mangium and (E. grandis x E. pellita). J Trop Soils 20: 157-166. Doi: 10.5400/jts.2015.20.3.157]
Soil Physical Properties and Oil Palm Plant (Elaeis guineensis Jacq.) Growth Applied with Solid Waste of Palm Oil Mill
Get PDFThe growth of oil palm plants, such as height, additional fronds, and stem diameter, depends on the soil condition and its physical properties. Good soil physical properties will support the growth of oil palm plants. On marginal lands such as ex-mining land and sub-soil soil that has poor soil physical properties, improvements must be made. Thus, palm oil cultivation on ex-mining land or subsoil land can grow well. This research aims to study solid application to various soil conditions to improve the growth and physical properties of oil palm plants. The land applied by solid is an ex-mining land subsoil land. Meanwhile, the land with flat topography has not been degraded as a control. The data analysis carried out is an orthogonal contrast test, between control with solid application and without solid application, between solid application with without solid, between among solid application (ex-mining and subsoil land), between among without solid application (ex-mining and subsoil land). The research result shows that soil physical properties and plant growth applied with solid are better than without solid, lower bulk density value, higher total pore space and water holding capacity, taller plant growth, higher palm branches quantity, larger stem diameter. Solid application in ex-mining is lower than solid application on sub-soil, with lower water holding capacity value and lesser palm fronds addition. Without solid application on ex-mining sites, the results are worse than no solid application on sub-soil, with lower water holding capacity and lower plant height. Control is better than solid and without solid applications, higher plants, higher addition of frond quantity, and larger stem diameter
Macrofaune Restoration In Peat One Year After Burning
No full textMacrofauna data on post-fire peat soils have been documented in many literatures, but assessments of soil macrofauna recovery in peatlands after one and a half years after fires are scarce. The aim of this study was to evaluate the recovery of soil macrofauna in peatlands after one and a half years after fires. This research was conducted on peat land in PT.SSS Kuala Panduk Teluk Meranti District, Pelalawan Regency. This research was conducted by survey method. Determination of the location using the purposive sampling method, especially on peatlands after one and a half years after the fire and unburned peatlands. Based on peatland cover, 6 samples were taken, and 6 samples were taken from unburned peatland. Determination of the sampling point using a systematic method. Macrofauna observations included number of families, number of individuals, population density, and diversity index. The study of macrofauna recovery was carried out by t-test on macrofauna data on peatland fires and unburned peatlands. The results shown in peatlands after a year and a half of fires are macrofauna recovery
The Nitrogen Learing In Applicated Peatlands Low Slow Npk Fertilizers And Fertilizers And Their Effect On Growing Of Sweet Maize (Zea Mays Sacchararata Sturt)
No full textUtilization of peat as agricultural land faced the problem of low soil fertility. Low soil fertility made nitrogen being leached easily. One solution to overcome Nitrogen leaching and efficiency fertilizer raising used dolomite and slow decompose fertilizers. This study aims to determine the effect of dolomite on Nitrogen element leaching in several types of NPK slow decompose applied for corn cultivation in peatland and determine the best dolomite dosage and NPK slow decompose with minimum Nitrogen leaching to optimum sweet corn plant growth in peatland. This research was conducted from August to October 2018 in the Experimental Garden Technical Implementation Unit and Soil Laboratory, Faculty of Agriculture, University of Riau. This research used experimentally and completely randomized design (CRD) factorial. The first factor is dolomite which consists of 4 levels (0 tons.ha-1, 2.5 tons.ha-1, 5 tons.ha-1, dan 7.5 tons.ha-1). The second is NPK slow decompose which consists of 4 levels (NPK single pearl, NPK 13: 6: 27: 4 + 0,65B Mahkota B, NPK 13: 6: 27: 4 + 0,65B Compound Plus Hi-Kay and NPK 13: 8: 27: 4 MgO Ztick). The results showed the administration of dolomite 23.55 g per tube and NPK slow decomposed could reduce Nitrogen leaching, improve physiology and growth of sweet corn plants. Provision of interaction between dolomite 5 ton.ha-1 with NPK slow decomposition (30.25 N, 3.72 P, 12.56 g per tube) produces the best interaction that can reduce the proportion of Nitrogen leaching and it can affects the increasing of plant growth
Utilization of Biochar Rice Husk and Straw to Increase Yield of Upland Rice (Oryza sativa L.) on Ultisol Medium
No full textBeras merupakan bahan makanan pokok sebagian besar penduduk Indonesia dan mengalami defisit setiap tahun. Budidaya padi gogo di lahan marginal seperti Ultisol menjadi salah satu alternatif untuk memenuhi kebutuhan beras. Ultisol memiliki beberapa masalah dalam pengelolaannya seperti keasaman dan kekurangan nutrisi. Diperlukan input seperti sekam padi dan jerami padi berupa residu biochar dan asap cair untuk memperbaiki masalah. Penelitian ini bertujuan untuk mempelajari pengaruh aplikasi biochar, asap cair dan interaksi biochar dan asap cair terhadap pertumbuhan padi gogo di medium Ultisol. Penelitian ini dalam bentuk percobaan faktorial disusun dengan rancangan acak lengkap (RAL). Faktor pertama adalah residu biochar terdiri dari 4 taraf (0/tanpa biochar, 10 ton ha-1 sekam padi, 10 ton ha-1 jerami padi dan 5 ton ha-1 sekam padi + 5 ton ha-1 jerami padi). Faktor kedua adalah asap cair terdiri dari 3 taraf (0/tanpa asap cair, 0.5 ml L-1 sekam padi dan 0.5 ml L-1 jerami padi) masing-masing kombinasi diulang tiga kali. Hasil penelitian menunjukkan bahwa residu biochar sekam padi dan jerami padi masing-masing dosis 10 ton ha-1 meningkatkan tinggi tanaman, jumlah anakan maksimum, jumlah anakan produktif, umur keluar malai dan bobot kering jerami dibandingkan kontrol bahkan pada campuran keduanya (1:1) peningkatannya lebih tinggi. pemberian asap cair sekam padi dan jerami padi dosis 0.5 ml L-1 meningkatkan tinggi tanaman, jumlah anakan maksimum, jumlah anakan produktif, umur keluar malai, bobot kering jerami dibandingkan kontrol. Interaksi campuran residu biochar (sekam padi dan jerami padi) dosis 10 ton ha-1 (1:1) dan asap cair 0.5 ml L-1 (sekam padi dan jerami padi) meningkatkan tinggi tanaman, jumlah anakan maksimum, jumlah anakan produktif, umur keluar malai dan bobot kering jerami dibandingkan kontrol
Respon Pertumbuhan Bibit Tanaman Gaharu (Aquilaria Malacensis) terhadap Pemberian Pupuk Pelengkap Cair (Ppc) Organik
Get PDFThe aim of this study was to determine the effect of the concentration of organic PPC plant hormones lead to the growth of seedlings of aloes and searching for the best concentration for the growth of seedlings of aloes. This research has been led in the Plant Laboratory, Faculty of Agriculture, University of Riau, Pekanbaru. This study was conducted over four months from May 2015 until the month of August 2015.This study was conducted experiments using completely randomized design (CRD), which consists of 4 treatments ie: without granting PPC organic (P0), the concentration of PPC organic 1 ml / liter of water (P1), concentration PPC organic 2 ml / liter of water (P2) and the concentration of organic PPC 3 ml / liter of water (P3). In this study there were 4 treatments consists of three replicates so that there are 12 experimental units. Each unit contained three seedlings are planted in polybags and two seedlings were sampled.The parameters measured were plant height (cm), number of leaves (pieces), stem diameter (cm), large whole leaf per plant (cm2), fresh weight canopy (g), the weight of wet roots (gram), heavy wet leaves ( gram), shoot dry weight (grams), root dry weight (grams), leaf dry weight (grams). The significant difference (HSD) at 5% was used for mean separations. Based on the research granting PPC organic against aloes seeds can be concluded that the concentration PPC organic 2 ml / l of water showed the highest growth in the number of leaves, stem diameter, leaf area per plant, the weight of the wet canopy, wet weight root, fresh weight of leaves, dry weight canopy, root dry weight and leaf dry weight aloes seeds than other treatments, but the treatment of PPC at each concentration effect no significant effect on plant height
APLIKASI KOMPOS TANDAN KOSONG KELAPA SAWIT DAN PUPUK NPKMg TERHADAP SIFAT KIMIA TANAH ULTISOL DAN KADAR HARA DAUN KELAPA SAWIT (Elaeis guineensis Jacq)
Get PDFLow productivity of oil palm in Ultisol need to resolve by utilizing appropriate input and efficient soil management. Utilization of  organic waste materials such as oil palm empty bunches (OPEB) is one of way for that. This research was conducted in Kuantan Singingi, Riau from September 2017 to February 2018. The aim of this research is to having dose of OPEB compost and NPKMg fertilizer that can optimize the value of soil chemical characters and nutrient content in leaves. The study determined the effect of composite oil palm empty bunches with cow manure (2:1(w/w)) and NPKMg (13:6:27:4) fertilizer. The study used a completely randomized design consisting of 6 levels :{(2,25 kg NPKMg), (10 kg OPEB compost + 1,75 kg NPKMg), (20 kg OPEBcompost + 1,5 kg NPKMg), (30 kg OPEBcompost+ 1,25 kg NPKMg), (40 kg OPEBcompost + 1,00 kg NPKMg), (50 kg OPEB compost) per tree}, each treatment was repeated 3 times. Parameters measured include soil chemical characters and nutrient content in leaves. The results of study showed, aplication 50 kg per tree TKKS compost was able to increase soil pH. Aplications (2.25 kg NPKMg, 50 kg TKKS compost, 20 kg compost TKKS + 1.50 kg NPKMg and 30 kg compost TKKS + 1.25 kg NPKMg) per tree can increase base saturation. Each treatment application for fertilization has been tested, given the same effect in all soil chemical characters tested beside pH and KB, and same effect in all leaf nutrient contents tested beside Zn.Key words : Palm Oil, Compost, OilPalmEmptyBunches, NPKM
Studi Pengelolaan Gulma di Perkebunan Kelapa Sawit Sekunyir Estate, PT. Indotruba Tengah, Minamas Plantation, Kalimantan Tengah.
No full textStudy of weeds management at oil palm Sekunyir Estate done to study management aspect and technical aspect. Management is done with restrain weeds according to chemistry and mechanical. Weeds control according to chemistry uses herbicide Audit and Starane done in palm circle and result collecting place, inter row and harvesting path, and Imperata cylindrica. Weeds control mechanically done with manual and weeds cutting machine. Weeds control according to chemistry in palm circle and result collecting place where does herbicide use Audit smaller 5 % from estimation, herbicide Starane bigger 47.7 % from estimation, and labour smaller 10 % from estimation. Weeds control in inter row and harvesting path according to where does herbicide use Starane smaller 33.3 % from estimation, and labour smaller 28.9 % from estimation. Labour use in weeds control with manual bigger 89 % from estimation. Weeds control with weeds cutting machine where does bigger labour use 5% from estimation, smaller oil use 33.3 % from estimation and smaller petrol use 33.7 % from estimation. Weeds that grow dominant in the year plant oil palm 1992-1995 is Centotheca lappacea with value Summed Dominance Ratio (SDR) highest 12.06 % in the year plant 1992. While weeds that grow dominant in the year plant 2005 and 2007 is Asystasia intrusa with value SDR highest 16.36 % in the year plant 2007. Labour cost use in weeds control in inter row and palm circle according to lower chemistry 89.4 % than according to manual
Pengaruh Pemberian Limbah Cair Tahu Dan Mulsa Organik Terhadap Pertumbuhan Pembibitan Tanaman Kakao (Theobroma Cacao L.)
Get PDFThe objective of this research is to know the effect of giving tofu liquid waste and rice straw mulch and to get the best interaction between liquid waste know and rice straw mulch for growth of cocoa seed (Theobroma cacao L.). The research was conducted at Balai Benih Induk Hortikultura (BBIH) (BBIH) Marpoyan Damai Pekanbaru. The study was conducted for three months from November 2016 until January 2017, implemented by Randomized Complete Design (RAL) Factorial consisting of 2 factors and 3 replications. The first factor of tofu liquid waste (T) consists of 4 levels: T0 = without tofu liquid waste, T1 = Tofu Liquid waste with concentration 60% / plant, T2 = Tofu liquid Waste with 80% concentration / plant, T3 = 100% / plant. The second factor of rice straw mulch (M) consists of 4 levels: M0 = Without mulch of rice straw, P1 = rice straw mulch of 6.25 g / plant (5 ton / ha), M2 = rice straw mulch of 12.5 g / plant (10 tons / ha), M3 = rice straw mulch of 18.75 g / plant (15 tons / ha). Each unit consists of 2 plants. The observed parameters were plant height, stem diameter, leaf number, soil temperature, soil moisture, root volume, canopy crown weight, crown dry weight, wet root weight, root dry weight, leaf wet weight, leaf dry weight, wet weight of stem, weight Dry stem, leaf area and root canopy ratio. The results showed 100% wetland / plant waste interaction and 6.25 g / plant rice straw mulch in cocoa breeding resulted in root volume, root dry weight, leaf wet weight and leaf area were highest compared to other treatments
Pengaruh Jumlah Buku terhadap Pertumbuhan Setek Cabang Bambu Betung, Andong, Temen, Ampel Hijau, Ampel Kuning, Ori, Tali dan Hitam pada Kultur Air
Get PDFOne and two nodes (if branch cuttings were use as vegetative propagation material in water culture, which is the dipping of all the nodes of branch cuttings in the water. Experiment was carried out on eight bamboo species: Dendrocalamus asper, Gigantochloa pseudoarundinacea, G. atter, Bambusa vulgaris green and yellow, B. bam boos, G. apus and G. atroviolacea, with one and two nodes branch cuttings. Only three species had been propagated successfully by this method, which were green and yellow B. vulgaris and G. apus. No significant growth difference was observed between one and two nodes branch cuttings. Growth percentage of green B. vulgaris on experiment 1, 2 and 3, yellow B. vulgaris and G. apus were 40, 56.25, 55, 30 and 9.38% respectively
