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Pertumbuhan Akar Kedelai pada Cekaman Aluminium, Kekeringan dan Cekaman Ganda Aluminium dan Kekeringan

AGRITROP Vol. 26, No. 1 Maret 2007
Publisher : AGRITROP

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Abstract

The objective of this research was to study the change of vegetative growth of root on some genotypes soybeanof aluminium toxicity, drought stress, and double stress (Al toxicity and drought stress). Research in rooting systemof soybean is hoped to get more attention, especially for supporting concept of new plant type for high yieldingpotential. Six genotypes of soybean (Slamet, Sindoro, Dieng, Sinyonya, Lumut, and Wilis), treated with aluminiumsaturated (Al 25%, Al 50%, and Al 75%) and field capacity (80% FC and 40% FC). Response of growth vegetativeidentified perception by root dry weight. Result of the study show that only one from six that is genotype Wiliswas tolerant at aluminium toxicity, drought stress, and double stress.

Screening of Soybeans Genotypes to Aluminum Toxicity and Drought Stress

Forum Pasca Sarjana Vol 32, No 4 (2009): Forum Pascasarjana
Publisher : Forum Pasca Sarjana

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Abstract

The objective of this experiment was to screen 16 soybean genotypes tolerance to double stresses of Al toxicity and drought stress.  A pot experiment was conducted at Cikabayan Experimental Station of Bogor Agricultural University from January to Maret 2004.  Soybean plants were grown in Gajrug ultisol soil with pH 3.9 and Al saturated 26.61 me/100 g of soil.  Al toxicity and drought tolerance were measured from the root length of seedling grown in 75% Al saturation and 40% field capacity compared to 25% Al saturation and 80% field capacity.  The decrease of root length much lower at 75% Al saturation and 40% field capacity. Result of the study showed that soybean of Moket, B.3799, Malabar, Wilis, Sindoro, and Slamet were tolerant while Dieng, Sinyonya, B.3780, Sicinang, B.3578, Ceneng, Epyek, MLG 3072, and Tidar were susceptible to Al toxicity and drought stress. Key words: soybean, Al toxicity, drought stress, selection

PERTUMBUHAN DAN HASIL UBI JALAR DENGAN PEMBERIAN PUPUK KALIUM DAN TRIAKONTANOL

AGROEKOTEKNOLOGI Vol 1, No 1 (2012)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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Abstract

ABSTRACT Sweet potatoes growth and yield with application potassium fertilizer and triakontanol growth         rate regulator. Sweet potatoes is a food that has a source of carbohydrate and contain a variety of nutrients. The other alternative to increase sweet potatoes productivity were application potassium fertilizer and triakontanol growth rate regulator. Potassium fertilizer is expected to increase growth, production and quality of tuber. Triakontanol growth rate regulator who has the ability to improve plant root system, to improve nutrient uptakes optimization. The objective of the research was to study growth and production of sweet potato with application potassium and triakontanol, was conducted in Pasar 1 Tanjung Sari, Medan from March to July 2012. This research used randomized block design factorial with two factors. First factor is potassium fertilizer dose that is 0, 1.5, 3, and 4.5 g KCl / plant, the second factor is  triakontanol dose that is 0, 0.0005, 0.0010, and 0.0015 g / l  water. The result of the research showed that potassium were significantly effect with plant’s length parameter on 7 week after planting with the highest average of 25.83 cm at dose  1.5 g KCl / plant. And triakontanol non significant effect to the growth and yield of sweet potatoes, and non interaction both of potassium and triakontanol to all parameter. Keywords: Sweet potato, potassium fertilizer, triakontanol ABSTRAK Pertumbuhan dan hasil ubi jalar dengan pemberian pupuk kalium dan triakontanol. Ubi jalar merupakan bahan pangan yang memiliki sumber karbohidrat dan kandungan zat gizi yang beragam. Salah satu upaya peningkatan produktivitas ubi jalar adalah pemberian pupuk kalium dan zat pengatur tumbuh triakontanol. Pupuk kalium diharapkan dapat meningkatkan pertumbuhan, produksi dan kualitas umbi. Triakontanol adalah zat pengatur tumbuh yang memiliki kemampuan dalam memperbaiki sistem perakaran tanaman, sehingga terjadi optimalisasi penyerapan hara oleh tanaman. Penelitian ini dilakukan untuk mengetahui pertumbuhan dan hasil ubi jalar pada pemberian pupuk kalium dan triakontanol yang dilaksanakan di lahan masyarakat Pasar 1 Tanjung Sari, Medan mulai maret sampai juli 2012 menggunakan Rancangan Acak Kelompok faktorial dengan 2 faktor. Faktor pertama adalah pupuk kalium dengan dosis 0, 1.5, 3, dan 4.5 g KCl/tanaman, sedangkan faktor kedua adalah triakontanol dengan dosis 0, 0.0005, 0.0010, dan 0.0015 g/l air. Hasil penelitian menunjukkan bahwa pupuk kalium berpengaruh nyata pada pertambahan panjang tanaman umur 7 MST dengan rataan tertinggi 25.83 cm pada dosis 1.5 g KCl/tanaman. Triakontanol tidak berpengaruh terhadap pertumbuhan dan hasil ubi jalar, serta tidak terjadi interaksi pupuk kalium dan triakontanol terhadap semua peubah amatan. Kata kunci: Ubi jalar, pupuk kalium, triakontanol

EFEKTIFITAS JARAK TANAM DAN JUMLAH BENIH PER LUBANG TANAM TERHADAP PERTUMBUHAN DAN PRODUKSI PADI GOGO

AGROEKOTEKNOLOGI Vol 1, No 4 (2013)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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Abstract

Effectiveness of different planting distance and number of seedlings per hill on growth and yield ofUpland Rice, supervised by Ir. Asil Barus, MS. and Dr. Dra. Ir Chairani Hanum, MS. The researchwas conducted in the field UPT BBI, at an altitude ± 57 m above sea level in April-July 2012 usingRandomized Block Design (RBD) factorial with two factors which are different planting (20 x 20cm, 20 x 25 cm , 20 x 30 cm) and the number of seedlings (2, 3, 4, 5, 6 seed /hill). The parametersmeasured were plant height, number of tillers, dry weight of the canopy, the canopy destructive dryweight, root dry weight, number of panicle, number of grain hollow, productive grain number, grainweight for each hill, 1000 grain weight and production for each plot. The results showed that allparameters significantly affected by the diiferent planting distance and number of seedlings per hilltreatment plant height, canopy dry weight, root dry weight, number of grain productive, and 1000grain weight.Keywords:

RESPONS PERTUMBUHAN DAN PRODUKSI TIGA VARIETAS SORGUM (Sorghum bicolor (L.) Moench) DENGAN PERBEDAAN SISTEM PENGOLAHAN TANAH

AGROEKOTEKNOLOGI Vol 1, No 4 (2013)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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Abstract

Growth and Yield Response of Three Sorghum Varieties (Sorghum bicolor (L.) Moench) onDifferent Soil Tillage. The aim of this research was to compare growth and yield of three varieties ofsorghum on different soil tillage. It was conducted at Pasar 1, Tanjung Sari, Medan about 25 mabove sea level on June to October 2012 by using Split Plot Design with two factors. The first factorwas sorghum variety (Sangkur, Kawali, Numbu) and the second one were different soil tillage (notillage, once tillage, twice tillage). The research land had sandy loam soil texture. The results ofresearch showed that growth and yield of Sangkur, Kawali, and Numbu weren’t effected by soiltillage treatment but without tillage treatment showed the best result. Numbu had better result onshoot dry weight (59.29%), biomass weight (59.37%), root volume (64.83%), yield per sample(59.42%), and 1000 grains weight (56.83%) compared with other varieties. The interaction betweensorghum variety and different soil tillage had no significantly effect on growth and yield of sorghum.Key words : Sorghum, variety, soil tillage, growth, yield

Roots Bioassay of Upland Rice Varieties on Several Soil Moisture Gradients

Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 5, No 2 (2015): Life Sciences
Publisher : Syiah Kuala University

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Abstract

Water availability is a major factor affecting rice production especially in upland.  The Production of upland rice is low because of the low of  water availability in upland.  Roots play an important role in upland rice adaptation to drought conditions. This study aimed to identify the characteristic of upland rice variety root development under  soil moisture gradients. This study use  randomized  factorial design consisting of 2 factors and 3 replicate.  Factor I : 12 upland rice variety, ie: Silumut, Batutegi, Limboto, Situpatenggang, Situbagendit, Towuti, Cirata,  Danau Gaung, Gajah Mungkur, Inpago 4, Inpago 5, Inpago 6. Factor II :  gradien of soil moisture level, ie: 20 %, 40 %, 60 %, 80 % field capacity. The Result of research indicate all the upland rice variety were classified tolerance based on relative value of root leght. The highest root lenght and the heaviest root dry matter were generally from combination uplandrice varieties with 60 & 80 % field capacity except Inpago 4 and Situbagendit showed  the highest root lenght at 20 % field capacity and combination The heaviest root dry matter at 40 %were Inpago 4 and Jatiluhur generally from characteristic of  root gro field capacity

Pertumbuhan, Hasil, dan Mutu Biji Kedelai dengan Pemberian Pupuk Organik dan Fosfor

Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 41, No 3 (2013): JURNAL AGRONOMI INDONESIA
Publisher : Bogor Agricultural University

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Abstract

ABSTRAKKedelai adalah tanaman yang membutuhkan fosfor (P) lebih banyak untuk pembentukan bijinya dibandingkan denganleguminosa lain. Fosfor merupakan faktor pembatas utama di daerah tropis karena sering difiksasi oleh aluminium danbesi. Salah satu upaya meningkatkan kesuburan tanah adalah melalui penambahan bahan organik dan manajemen fosfor.Tujuan penelitian ini adalah untuk mempelajari pengaruh pupuk organik dan fosfor terhadap pertumbuhan, hasil dan mutubiji kedelai. Percobaan dilakukan mulai April sampai September 2011 berupa percobaan pot (isi 10 kg tanah kering udara)menggunakan rancangan kelompok lengkap teracak dua faktor. Faktor pertama adalah pupuk organik yang terdiri atas tigajenis, yaitu kotoran sapi, tandan kosong kelapa sawit (TKKS), dan blotong, masing-masing dengan dosis 180 g tanamandan  tanpa  pupuk (kontrol).  Faktor  ke-2  adalah dosis P yang terdiri atas 4 taraf, yaitu 0, 0.45, 0.90, dan 1.35 g Ptanaman. Pupuk P tidak berpengaruh nyata pada seluruh peubah amatan, sedangkan pupuk organik berpengaruh nyata.Kompos blotong meningkatkan jumlah bintil akar efektif (77.0%), bobot kering akar (94.7% ), bobot kering  biji (50.3%),dan  kandungan protein biji (0.9%) dibandingkan tanpa pemberian. Kandungan lemak biji kedelai meningkat 4.2% denganpemberian blotong atau TKKS. Bobot kering tajuk tertinggi diperoleh pada pemberian kompos blotong dan pupuk P dengandosis 0.45 g tanaman-1-1.Kata kunci: blotong, Glycine max, kotoran sapi, tandan kosong kelapa sawit, lemak kedelai, protein kedelai

KADAR N, P DAN K TANAH PADA TANAMAN KELAPA SAWIT MENGHASILKAN DENGAN BERBAGAI KOMPOSISI PENANAMAN TANAMAN SELA DI BAWAH TEGAKAN

AGROEKOTEKNOLOGI Vol 2, No 3 (2014)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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Abstract

NPK soil on oil palm produce plantation with increase diversity of vegetation. Soil fertility level onthe oil palm produce will be decreased, because there is no vegetation. Therefore, one the effort toincrease the soil productivity with planting of vegetation diversity under oil palm trees. Theresearch aimed to know NPK soil on oil palm produce plantation with increase diversity ofvegetation. The research was carried out in the PTPN III Kebun Bangun Simalungun regency,North Sumatera from September to Desember 2013. The experiment design was non factorialCompletely Randomized Design with 5 levels intercrop compotition, Arachis glabrata 100%,Stenotaphrum secundatum 100%, Arachis glabrata 50% + Stenotaphrum secundatum 50%, Arachisglabrata 75% + Stenotaphrum secundatum 25% dan Arachis glabrata 25% + Stenotaphrumsecundatum 75%. The analysis of data using the analysis variance and continued by DMRT. Theresults of this research showed that diversity compotitions intercrops given significant effect on thefresh weight leaf of Stenotaphrum secundatum 100%, the dry weight leaf of Stenotaphrumsecundatum 100%, the fresh weight root of Arachis glabrata 75%, the dry weight root of Arachisglabrata 75% and could increased the levels of soil phosphorus, but not significant effect on the oilpalm leaf chlorophyll, the intercrops leaf chlorophyll, the levels of soil nitrogen and potassium.Keywords: Intercrops, NPK soil, leaf chlorophyll

TANGGAP PERTUMBUHAN DAN PRODUKSI JAGUNG MANIS PADA PEMBERIAN MIKROORGANISME BERMANFAAT DAN KOMPOS TANDAN KOSONG KELAPA SAWIT

AGROEKOTEKNOLOGI Vol 2, No 3 (2014)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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Abstract

Development of sweet corn culture technique need efficient of farming system, more economical,quality, and productivity. For this reason, research has been conducted at experimental field of USUAgriculture Faculty (± 25 m asl.) in July – October 2013 using a randomized block design with twofactors. The first factor was concentrations of microorganism with levels: 0, 10, 20, and 30 ml/l ofwater, were the second factor was doses of Empty Fruit Bunches Oil Palm (EFBOP) compost withlevels: 0, 150, and 300 g per plant with three replications. The result of this research showed thatapplication of microorganism had significant effect on plant height at six’th weeks after planting(WAP), cob with husk per plant, and cob without husk per plant. Empty fruit bunches oil palmcompost significant effect only for stem diameter. Interaction between application microorganismand EFBOP compost significant effect on cob length and cob diameter.Keywords : sweet corn, beneficial microorganisms, EFBOP compost

Pertumbuhan Bibit Kelapa Sawit (Elaeis guineensis Jacq.) Pada Berbagai Perbandingan Media Tanam Sludge dan tandan Kosong Kelapa Sawit (TKKS) Di PreeNursery pree Nur sersey

AGROEKOTEKNOLOGI Vol 2, No 4 (2014)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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Abstract

Growth of Oil Palm Seedlings (Elaeis guineensis Jacq.) with Different Comparison Sludge andEmpty Palm Oil Fruit Bunches (EPOFB) Media in Pre Nursery. Guided by CHAIRANI HANUMand RATNA ROSANTI LAHAY. The objective of this research was to study growth of oil palmseedlings at various growing media comparisons of sludge and EPOEFB in pre nursery. Thisresearch was conducted at Kebun Bangun PTPN III from January-June 2013 using non factorialrandomized block design consisted of 11 types of growing media: top soil, sludge, TKKS andcomposite media 10:80:10, 10:70:20, 10:60:30, 10:50:40, 10:40:50, 10:30:60, 10:20:70, 10:10:80.Parameters observed were shoot and root dry weight. The results showed that each media haddifferent growth characteristics. The growth media was significantly efffect on all parametersexcept plant height. Sludge can be used as a growing media if it is in the form of a mixture. If thesludge is used alone then plant growth restricted. Media composition 10:20:70 gave the best resultsthrough the highest value shoot dry weight.Keywords : growth , seeds , palm oil , sludge , TKKS