Jurnal Agroekoteknologi
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HUBUNGAN PERAKARAN BEBERAPA KULTIVAR KEDELAI DENGAN KEMAMPUAN BERSAING MELAWAN GULMA
Full text linkABSTRACTThe research was aimed to see the influence and rooting relationship to the ability of several cultivars of soybean to weed. This research was arranged using split plot design with three blocks as the repetition where the main plot was the weed treatments and those were weedy, weeding in a critical period, and weed-free. Sub-plot was the soybean cultivars which are Anjarmoro, Argomulyo, Burangrang, Gema, Gepakkuning, Kaba, and Wilis.The results showed that rooting variables that could be used as a marker of the ability of soybean plants to compete to weeds were root length and root volume.Keywords: competitive, cultivar, root, soy bean, wee
DINAMIKA UNSUR FOSFOR PADA TIAP HORISON PROFIL TANAH MASAM
Full text linkPhosphorus is a macro essential nutrient for plants that are needed in large quantities third after Nitrogen and Potassium. Phosphorus acts as an activator of various plant metabolism enzymes and is a component of chlorophyll. Phosphorus is a necessary element in large amounts (macro nutrients), the amount of phosphorus in plants is smaller than nitrogen and potassium, but phosphorus is the key to plant life by absorbing phosphorus in the form of primary orthophosphate ions (H2PO4-) and secondary orthophosphate ions (HPO42-). In acid soils, the phosphate will be compounded in Al-P and Fe-P forms, whereas in alkaline soil, phosphate will be compounded with calcium as Ca-P forming a soluble complex compound. This research was conducted with the aim of evaluating the relationship and interrelations between the dynamics of phosphorus nutrients to some soil chemical properties on each acid soil profile horizon. This research was conducted in Laboratory of Soil Chemistry and Fertility Department of Soil Science and Land Resources Faculty of Agriculture, IPB. The soil samples used in this research were soil samples originating from the location of Neglasari Jasinga Bogor Village and Padasuka Village Maja Lebak District of Banten Province was taken per horison in soil profile. The results of the two land sites used showed that the dynamics of the availability of phosphorus nutrients. This dynamic was due to the presence of soil pH and aluminum solubility within each soil horizon. On the land profile of origin of Jasinga and lebak that the value of Al-dd would be high if the low soil pH value and available P value would be high if there was a decrease in soil pH value and the value of Al-dd soil.Keywords: acid soil, aluminum, phosphoru
UJI TEPUNG BIJI MENGKUDU (Morinda citrifolia L.) TERHADAP HAMA BUBUK JAGUNG Sitophilus zeamais M. (Coleoptera; Curculionidae)
Full text linkSitophilus zeamais M. was a warehouse pest that attacks corn kernels in storage. S. zeamais pest control commonly used fumigant insecticides that used still has many disadvantages such as food safety impacts, environmental pollution and pest resistance, so that a safe alternative to control was needed, one of which was using noni seeds. This research was aimed to obtain a dose of noni seed flour that was effective to S. zea mays corn powder pest mortality.The research was conducted at the Laboratory of Plant Pest, Faculty of Agriculture, University of Riau from March to May 2018.The treatment used was the dose of noni seed flour 0 g.100 g-1 corn, 2 g.100 g-1 corn, 4 g.100 g-1 corn, 6 g.100 g-1 corn, and 8 g.100 g-1 corn. This research was conducted experimentally using a completely randomized design (CRD) with 5 treatments and 4 replications. Based on the results of the research, the dose of noni seeds 8 g.100 g-1corn had not been effective in controlling S. zeamais with mortality of 52.50%, shrinkage of corn seed weight by 8.78% and an increase in individuals by 8.20.Keywords: Morinda citrifolia L., Sitophilus zeamais M., Zea may
JUMLAH BUNGA DAN POLONG EMPAT KULTIVAR LOKAL KACANG TANAH ASAL BANTEN (Arachis hypogaea L.) PADA KETERSEDIAAN AIR TANAH YANG MENURUN SELAMA FASE REPRODUKTIF
Full text linkExperiments were performed to characterize the response of peanut local cultivars from Banten to soil water availability decreased during the reproductive phase. The experiments used factorial randomized block design with three replications of two factors. The first factor was the soil water availability consists of three levels (100%, 75%, and 50%). The second factor was the peanut local cultivars from Banten consists of four levels (local cultivars of Cikeusal, Petir, Anyer, and Cisoka). The results showed a similar general pattern that was the decreasing soil water availability resulting in the decreasing amount of flowers and pod number of peanut local cultivars from Banten. Flowers appear began to plant at 24 and ending at 46 days after planting with a period of at most appear at the age of 26 up to 36 DAP. Four peanut local cultivars from Banten showed no difference in tolerance to the declining of soil water availability. Number of flowers and peanut pods begin to decrease when soil water availability as as much as 75%. Keywords: Flower, Local cultivars, Peanuts, Soil water availability, Pod numbe
EFEK HETEROSIS DAN AKSI GEN UKURAN BUAH PADA HIBRIDA PEPAYA
Full text linkFruit size is an important character in determining the quality of papaya fruit. Domestic consumers prefer small or medium size papaya fruit, while for the desirable fruit slices are large one. Assembly papaya varieties based on fruit size can be done through conventional breeding. The objectives of this study were to determine the effects of heterosis and gene action on the fruit size character of the papaya hybrid. The research was conducted at KP. Sumani Tropical Fruit Research Institute, Solok, West Sumatra in 2010-2011. This research used a randomized block design with 25 treatments (20 hybrids and five elders papaya) and repeated three times. The results showed that in general the heterosis effect on fruit size (weight, length and girth of the fruit) was found below 50%. Heterosis effect can decrease and increase the size of the fruit because the value is negative and positive. The negative excess of dominant gene action resulting in smaller sizes of F1 than the average of both parents or youngest parents. Therefore, crosssing BT3 x BT2 had the smallest fruit size. Positive excess of dominant gene action i.e crossing BT1 x D, BT4 x BT1 and D x BT3 resulted in bigger fruit size than two parents. Keywords: Gene action, Heterosis, Hybrid, Papay
PENGARUH KETINGGIAN TEMPAT TERHADAP KANDUNGAN PROKSIMAT DAN KOMPOSISI ASAM OKSALAT PADA KULIT UMBI TALAS BENENG (Xanthasoma undipes K.Kock) YANG DIBUDIDAYAKAN
Full text linkTalas beneng (Xanthosoma undipes K. Koch) is the local taro from Mountain Coral of Banten Province. This research was aimed to know the nutrient content, composition, oxalic acid and mineral content in the talas beneng skin are cultivated by the community at different places. The research was carried out from May until October 2016. This research was conducted in the form of field research around the area of Mountain Coral, Pandeglang Regency, Banten Province. Analysis of the talas beneng skin was done in Balai Besar Industri Agro (BBIA), Bogor. The results showed that the content of proksimat talas beneng skin was cultivated include water, ash, protein, fat and carbohydrates. Moisture content at a higher altitude 500 m above sea level (asl): (87,6%) compared to the height of 400 m dpl (84,6%). Ash at altitudes of 400 m asl was higher (1,92%) compared to the height of the 500 m asl (1.53%). Protein content (1.04%) and fat (0.25%) at an altitude of 500 m asl was higher compared to the height of 400 m asl (1.00% and 0.23%). Carbohydrate content (12.2%) at an altitude of 400 m asl higher than the height of the 500 m asl (9.58%). Content of oxalic acid (0,19%) at an altitude of 400 m asl higher than the height of the 500 m asl (0.12%).Keywords: elevation, proximate, oxalic acid, talas benen
PENGARUH KOMBINASI PUPUK N, P, K DAN VERMIKOMPOS TERHADAP KANDUNGAN C-ORGANIK, N TOTAL, C/N DAN HASIL KEDELAI (Glycine max (L.) Merill) KULTIVAR EDAMAME PADA INCEPTISOLS JATINANGOR
Full text linkInceptisols is the type of soil in Indonesia that has low fertility. It is necessary to improve the soil fertility through the use of fertilizers and organic matter to raise the quality of Inceptisols. The research was aimed to know the effect of vermicompost and N, P, K fertilizer combination to Organic-C, Total N, C/N and yield of Edamame soybean on Inceptisols at Jatinangor. The research was carried out from March until June 2016 at Ciparanje Experimental Farm, Faculty of Agriculture of University of Padjadjaran at Jatinangor, Sumedang at an altitude about ± 765 meters above sea level. The research used the Randomized Completely Block Design (RCBD) that consisted of eight treatments and three replications. The treatments were: control (no treatment), ½, 1, and 1½ dose recommendation of N, P, K fertilizer (Urea 100 kg ha-1 + SP-36 150 kg ha-1 + KCl 125 kg ha-1), also, 5 and 10 t ha-1 vermicompost. The results showed that combination treatment of vermicompost and N, P, K fertilizer significantly increased Organic-C, Total N, C/N and yeild of Edamame soybean. The combination of 1 dose recommendation of N, P, K fertilizer and 5 t ha-1 vermicompost gave the best result that produced 116,5 g plant ha-1(10,4 t ha-1) yield of Edamame soybean.Keywords: C/N, Edamame soybean, Inceptisols, N,P,K fertilizer, Vermicompost
RESPON BEBERAPA MEDIA PEMBIBITAN TERHADAP PERTUMBUHAN BIBIT ALPUKAT (Persea americana Miller.)
Full text linkAvocado plant nurseries often constrained by the type of planting medium used. The research objective was to determine the response of some types of media on the growth of seedlings of avocado. The research was conducted from September 2015 until January 2016 at the Aripan Experimental Garden, Indonesian Tropical Fruit Research Institute, Solok (West Sumatra). The design used in this experiment was a randomized block design with six treatments and four replications. The treatments given in these experiments were the soil, soil and manure 1: 1, soil and husks 1: 1, soil and husks 2: 1, soil and husk 3: 1, soil, husks and manure 1: 1: 1. The whole experiment consisted of 24 experimental unit and each experimental unit consisted of 10 plants. The results showed that the mix of soil and manure gives the best growth in avocado seedlings.Keywords: Avocados, Media, Manur
PENGARUH PEMBERIAN BERBAGAI MACAM PUPUK DAUN TERHADAP PERTUMBUHAN TUNAS AKSILAR UBI JALAR (Ipomoea batatas L.) VARIETAS CILEMBU SECARA IN VITRO
Full text linkEffect of foliar fertilizer on growth of axillary buds of sweet potato (Ipomoea batatas L.) Cilembu Variety as in vitro. This research was aimed to find inexpensive formulations planting medium for the multiplication of sweet potato as in vitro. Research was conducted at the Tissue Culture Laboratory of Faculty of Agriculture, University of Tridinanti Palembang from November 2015 until April 2016. The reseach used Randomized Completely Design (RCD) with 5 treatments and 5 replications, namely: H1 = MS (control), H2 = Hyponex 2 g, H3 = Growmore 2 g , H4 = Gandasil D 2g, H5= MS+Hyponex 2 g, H6 = MS+ Growmore 2g, H7=MS+Gandasil D 2g. Each treatment was repeated five (5) times. Parameter observed were: time formed buds, shoots, number of leaves, the time to form roots, number of roots, root length, and percentage of plantlets life. The result showed that the treatment of foliar fertilizer no significant effect than that of MS to spur the growth of axillary buds explants of sweet potato varieties Cilembu in vitro. In the tabulation of foliar fertilizer Growmore 2 g gave explant growth of axillary buds of sweet potato better.Keyword: Sweet potato, Foliar fertilizer
PENDUGAAN FAKTOR YANG MEMENGARUHI JUMLAH BUAH PER TANDAN PADA RAMBUTAN (Nephelium lappaceum, L.)
Full text linkRambutan productivity in Indonesia is still low, thus many efforts have been made to increase it. The objective of this research was to estimate the factors related to the number of fruits per cluster on rambutan trees. The research has been conducted in Aripan experimental garden, Indonesian Tropical Fruit Research Institute, Solok in February, 2016. Variable of production in this experiment was the number of fruits per cluster as the dependent variable. The independent variable was used to estimate the factors related to the number of fruit per cluster, consisted of trunk circumference, crown width, the number of leaves, leaf length, leaf width, plant height, the number of fruits per cluster, and the number of bunches per tree. The results showed that a multiple linear regression model consisting of a number of leaves, plant height and number of bunches per tree can explain 70.21% of phenotypic diversity of the number of fruits per cluster.Keywords: Nephelium, Regression, Estimatio