Uji Daya Simpan Dan Viabilitas Benih Karet (Hevea Brasiliensis Muell-arg.) Tanpa Cangkang Terhadap Konsentrasi Larutan Osmotik Dan Lama Pengeringan

The seed of rubber is a kind of recalcitrant seeds which is have a low shelf life with the result thatquickly in deterioration so it needed a special treatment in storage period to maintain the seedviability. By using the osmotic solution concentration of Polyethylene Glycol 6000 and seed dryingwhich is very helpful in recalcitrant seed storage due to it has osmotic cell potential to restrict thealteration of water and oxygen capacity in seed. This research aimed to get the optimal of osmoticsolution concentrations and drying time to maintain the seed viability of Rubber. It conducted sinceApril until June 2013 in Laboratory of Plant Breeding, Agriculture Faculty, University of SumateraUtara. The research uses the completely randomized design with two treatments as factor and threereplications. The first factor is osmotic solution concentration of PEG 6000 of PEG 6000 : 0, 15,30, and 45 (% w/v) and other factor is drying period : 0, 4, 8, 12, 16 (hours). The results showed theosmotic solution concentration of PEG 6000 30% w/v significantly in seed growth rateafter storageperiod 3,49% etmal and maximum potential growth 64,22%. 4 hours drying period is the best inseed growth rateup to 3,49 3,89% etmalwith 66,94% maximum potential growth. The osmoticsolution concentrations of PEG 6000 30% w/v and 4-hour drying period is the best combination oftreatments which can seed growth rate up to 3,95% etmal with 66,67% maximum potential growth

Produksi Biji Bawang Merah Samosir Aksesi Simanindo Terhadap Konsentrasi GA3 Dan Lama Perendaman Di Dataran Tinggi Samosir

The aim of the research was to identify the effect of GA3 concentration and soaking period on the seed yield of shallot. Research was conducted at Hatoguan Village, Palipi Subdistrict, Samosir from February up to July 2014, carried out by using randomizes block design with two factors, replicated three times. The first factor was GA3 concentrations (50 ppm; 100 ppm; 150 ppm; 200 ppm; and 250 ppm) and the second was soaking period (30; 60; and 90 minutes). Parameters observed were the number of plant producing flowers per plot, the number of umbel per plot, seed weight per umbel, and seed weight per plot. The results showed that among all parameters observed, only the number of plants producing flowers per plot and seed weight per umbel were affected by GA3 concentration. The highest number of plants producing flowers and seed weight per umbel were produced by G4 (200 ppm GA3) i.e 10,780 plants (43,12 %) and 0,202 g respectively. Meanwhile, only seed weight per umbel was significantly affected by soaking period. The correlation between soaking period and seed weight per unbel showed positive linear regression

Pertumbuhan Dan Produksi Bawang Merah (Allium Ascalonicum .L) Terhadap Pemberian Kompos Kulit Kopi Dan Pupuk Organik Cair

ABSRACTShallot is one of the superior spice plants.Nowday, cultivation of shallot is directed for using inputfrom organic matter. Coffea peel compost and liquid organic fertilizer are potential nutrient sourceto use in organic cultivation of shallot. The growth and production of shallot by giving coffee barkcompost and liquid organic fertilizer. This research was proposed to find out effect of growth andproductions respons of shallot as coffee bark compost and liquid organic fertilizer. The researchstarted from october to december 2011. The design use randomized block design factorial with 2aspect. The first aspect is compost bark coffee consist of four stages those were K0 ( 0 g/plant ), K1( 30 g/plant ), K2 ( 60 g/plant ), ( 90 g/plant ). The second factor is liquid organic fertilizer consistfour stages those are P0 ( 0 ml/l water ), P1 ( 3 ml/l water ), P2 ( 6 ml/ l water ), P3 ( 9 ml/l water ).Coffee bark compost given ferform real effect to number of leave per clumb 6 MST, diameter ofbulk and production per plot but not gave any influenced to high of plant, leaves number per sample2 – 5 MST, number bulbs per sample, wet weight per sample and dry weight per sample. Liquidorganic fertilizer given ferform real effect to high of plant per sample 3 – 6 MST, leaves number persample 5 and 6 MST, diameter of bulk per sample and production per plot, but not gave anyinfluenced to high plant 2 MST, leave number per clump 2 – 4 MST, number bulbs per sample, wetweight per sample and dry weight of bulb per sample. The intraction between both aspectinfluenced on diameter of bulb

Pertumbuhan Dan Produksi Bawang Merah Dengan Pemberian Berbagai Pupuk Organik

Growth and Yield of Shallot (Allium ascalonicum L.) with Application of the some of organicfertilizer. Application of in organic chemical fertilizers continuously without organic fertilizers hascaused soil degradation. One of the negative effect is decrease agriculture production such as shallotyield. A solution to solve this problem is to substitute chemical fertilizers application with organicfertilizer that can demage the soil into organik fertilizer. The objective of this research was to studygrowth and yield of shallot with application of organic fertilizer. The research was conducted inPasar 1 Tanjung Sari, from June until August 2012. The research using Randomized Block Designone factor with six compost, were without organic fertilizer (control), compost of empty fruitbuches oil palm, sludge, vermicompost, straw, and municipal solid waste. Parameters were: plantheight, number of plantlet, shoot root ratio, clove dry weight of sample, dry weight of sample andclove number of sample. The results showed that application of organic fertilizer did not hadpositive response to the growth of shallot except for number of plantlet on 3 weeks after plantingtime and shallot dry weight per sample