scholarly journals Phosphorus Fractions and Their Transformations in Entisol

2018 ◽  
Vol 11 (1) ◽  
pp. 485
Author(s):  
Alessandra Mayumi Tokura Alovisi ◽  
Alves Alexandre Alovisi ◽  
Ademar Pereira Serra ◽  
Luciene Kazue Tokura ◽  
Livia Maria Chamma Davide ◽  
...  
Keyword(s):  
Experimental Design ◽  
Phosphate Fertilizer ◽  
Soil Samples ◽  
Chemical Fractionation ◽  
Organic P ◽  
P Fractions ◽  
Randomized Design ◽  
Phosphate Fertilization ◽  
Organic Fractions ◽  
Completely Randomized Design

The availability of phosphorus in the soil is a factor that directly interferes with its absorption by plants. This availability can be influenced by the texture, dose of the phosphate fertilizer and the time of contact with the soil. This study aimed to quantify the organic and inorganic fractions of P accumulated in a sandy soil receiving doses of phosphorus, incubated and grown with rice. The experimental design was a completely randomized design, in a 4 × 3 factorial scheme, with four replicates, and four P doses (0, 80, 240, and 410 mg dm-3) and three evaluation times (before sowing, after harvest, and incubated). Soil samples were collected before, after incubation, and after rice harvesting, and then submitted to a chemical fractionation of P. P fractions were influenced by soil collection times. The inorganic fractions prevailed before sowing and after incubation, and the organic fractions prevailed after harvest. Phosphate fertilization favored mineralization of organic P and redistributes the inorganic and organic P fractions, between labile and non-labile compartments. The application of phosphate fertilizer in an Entisol Quartzipsamment contributes to the accumulation of inorganic fractions, especially in the most labile fractions.

scholarly journals Urochloa brizantha Interference in the Phaseolus vulgaris Radicular System Fertilized with Phosphorus

2019 ◽  
Vol 37 ◽  
Author(s):  
A.F. FREITAS ◽  
J.C. MACIEL ◽  
M.M. SILVA ◽  
J.B. SANTOS
Keyword(s):  
Phaseolus Vulgaris ◽  
Root System ◽  
Ground Surface ◽  
Root Systems ◽  
Phosphate Fertilizer ◽  
Randomized Design ◽  
Bean Plants ◽  
Phosphate Fertilization ◽  
Completely Randomized Design ◽  
Urochloa Brizantha

ABSTRACT: Interference between root systems occurs below the ground surface long before the competition between plants is expressed in the shoot. Nutrients stand out for being limited in the soil, requiring supplementation, especially phosphorus. Thus, this study aimed at estimating, from sowing, visual characteristics in the root systems of bean plants from the Carioca variety (Phaseolus vulgaris) when in competition with brachiaria (Urochloa brizantha), considering also the application of phosphorus P2O5. A factorial design with six treatments was used resulting from the combination of three cultivation schemes (beans in isolated crops or in competition with one or two brachiaria plants), and the application or not of phosphate fertilizer (90 kg ha-1 of P2O5), in a completely randomized design with four replications. After the sowing of the species, the visualization results were taken at every 12 hours, by means of the photographic record of the development of the root system in rhizotrons. Greater growth and greater total area of the root system were observed in bean monocultures and when competing with one brachiaria plant in the presence of phosphate fertilization. In contrast, the bean plant in the container with two brachiaria plants invested its resources in greater length and total area of the root system when in the absence of the fertilizer. It can be stated that there is evidence of interference starting three days after the sowing of the species.

scholarly journals Pengaruh Pupuk Kalium Dan Fosfat Terhadap Ketersediaan Dan Serapan Fosfat Tanaman Kacang Tanah (Arachis Hypogaea L.) Pada Tanah Brunizem

Agrologia ◽  
2018 ◽  
Vol 1 (2) ◽  
Author(s):  
Elizabet Kaya
Keyword(s):  
Soil Ph ◽  
Phosphate Fertilizer ◽  
Fertilizer Treatment ◽  
Potassium Fertilizer ◽  
Phosphate Fertilizers ◽  
Randomized Design ◽  
Arachis Hypogaea L ◽  
Phosphate Fertilization ◽  
Completely Randomized Design ◽  
Available Phosphate

The aim of this research was to investigate the availability and uptake of phosphate with the application of potassium and phosphate fertilizers in brunizem soil.  The experiment was arranged in a factorial completely Randomized Design which tested various levels of KCl (no calium, 0.2 g/5 kg soil and 0.4 g/5 kg soil) and SP-36 (no fosfat, 0.35 g/5 kg soil and 0.70 g/5 kg soil) fertilizers. The result showed a significant effect of potassium fertilizer treatments on soil pH. The best rate of potassium fertilizer was 0.4 g KCl per pot or 160 kg KCl ha-1.  Phosphate fertilizer treatment gave a significant effect on soil pH, available phosphate and phosphate uptake.  The best rate of phosphate fertilization was 0.70 g SP-36 per pot or 240 kg SP-36 ha-1. 

Pengaruh ovaprim, aromatase inhibitor, dan hipofisa terhadap kualitas telur ikan Lele Dumbo (Clarias gariepinus)

2017 ◽  
Vol 5 (1) ◽  
Author(s):  
Erwin A. Aziz ◽  
Ockstan Kalesaran
Keyword(s):  
Survival Rate ◽  
Experimental Design ◽  
Aromatase Inhibitor ◽  
Fish Larvae ◽  
Clarias Gariepinus ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
The Difference ◽  
Hatching Eggs

This study aimed to determine the effect of ovaprim hormone, aromatase inhibitor and pituitary on the quality of the catfish eggs (Clarias gariepinus). Experimental Design used was Completely Randomized Design (CRD) with four treatments, each with three replications. Treatment A: ovaprim; treatment B: Aromatase inhibitors, treatment C: hypophysis and treatment D: Control. The results showed that the difference in treatment gave highly significant effect on fertilization and hatching eggs but no significant effect on the survival rate of larvae. Aromatase inhibitor hormone was the best because it provided highly significant effect on fertilization (92.66%), hatchability of eggs (95%), and surviva rate (81.33%) of fish larvae.   Keywords : Clarias gariepinus. Ovaprim, Aromatase Inhibitor, Hypophysis, egg, larvae

scholarly journals PENGARUH NAUNGAN TERHADAP PERTUMBUHAN SEMAI MAKILA (Litsea angulata)

2017 ◽  
Vol 1 (3) ◽  
pp. 262
Author(s):  
Edom Bayau
Keyword(s):  
Experimental Design ◽  
Rheumatic Diseases ◽  
Seedling Growth ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Good For

   Makila (Litsea angulata) is a type of commercial timber and is very attractive to many people because of good quality and can also be used as a medicine in curing rheumatic diseases should be assigned the paramount concern. cultivation / reproduce makila can be done in a fast way is through the nursery in the field. in nurseries should also pay attention to things that affect makila, one of which is related to the intensity of sunlight makila seedling growth. The research conducted at the location of the greenhouse Faculty of Agriculture, University of Pattimura which take place september until november 2014 with the aim to determine the seedling growth makila (Litsea angulata) to determine what percentage of shade is good for seedling growth makila (Litsea angulata). The experimental design used was completely randomized design (CRD) with 5 (five) treatments, the seedlings without using Shade, Shade 30 percent, 50 percent Shade, Shade 65 percent, and Shade 75 percent. The results showed that the seedling Makila (Litsea angulata) is a kind of tolerance with all shade or kind makila able to grow in places that are open and shaded place.

scholarly journals Leaching of Picloram in ultisol under different rainfall volumes

2011 ◽  
Vol 29 (spe) ◽  
pp. 1129-1136 ◽  
Author(s):  
E.C Assis ◽  
A.A Silva ◽  
L D'Antonino ◽  
M.E.L.R Queiroz ◽  
L.C Barbosa
Keyword(s):  
Liquid Chromatography ◽  
High Performance ◽  
Soil Samples ◽  
Soil Sampling ◽  
Horizontal Position ◽  
Leaching Potential ◽  
Excess Water ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Plot Design

The present study aimed to evaluate the leaching potential of Picloram in Ultisol columns under different rainfall amounts. For such, 30 treatments were evaluated (one soil associated with three levels of rainfall and ten depths).The experiments were arranged in a split-plot design, in a completely randomized design, with four replications. PVC columns of 10 cm in diameter and 50 cm in length were filled with these soils, moistened, and placed upright for 48 hours to drain the excess water. The herbicide was applied and rainfall simulations were carried out at specified intensities, according to the treatments, to force Picloram leaching. After 72 hours, all the columns were arranged in a horizontal position and opened lengthwise. Then, soil sampling was carried out every 5 cm of depth for subsequent herbicide extraction and quantification and analysis by high performance liquid chromatography. The remaining soil samples were placed in plastic pots, and, at the respective depths, the indicator species Cucumis sativus was sown. Twenty-one days after the emergence (DAE) of the indicator plants, evaluations were conducted to verify the symptoms of toxicity caused by Picloram in the plants. It was concluded that Picloram leaching is directly dependent on the volume of rain applied. The herbicide reached the deepest regions in the soil with the highest intensity of rain. The results obtained by bioassay were in agreement with those found by liquid chromatography.

scholarly journals Pemanfaatan sukun muda untuk peningkatan nilai gizi abon ikan tongkol

2021 ◽  
Vol 2 (2) ◽  
pp. 185
Author(s):  
Eva Fitriyaningsih
Keyword(s):  
Experimental Design ◽  
Nutritional Value ◽  
Economic Value ◽  
Chemical Properties ◽  
Animal Nutrition ◽  
P Value ◽  
Randomized Design ◽  
Study Results ◽  
Completely Randomized Design ◽  
Actual Participation

Background: Using young breadfruit to increase the breadfruit usability and economic value, one of the efforts is through the enrichment of the type of processed breadfruit products, breadfruit provides nutritional value that is beneficial to health, one of the help of breadfruit is increasing breadfruit for shredded products.Objectives: This study aims to find out how to improve young breadfruit 20%, 30%, 40% of the chemical properties (carbohydrate, protein, and fiber) of shredded tuna.Methods: This study used an experimental design with a non-factorial Completely Randomized Design (CRD) with three preparations and three repetitions. Then the chemical tests (carbohydrate, protein, and fiber) at the Laboratory of Animal Nutrition and Feed Technology of the Faculty of Agriculture, Syiah Kuala University, Banda Aceh.Results: The study results showed actual participation in young breadfruit 20%, 30%, and 40% of the chemical properties (carbohydrate, protein, and fiber) in shredded tuna with a p-value < 0.05.Conclusion: Agreeing that 20%, 30%, and 40% of young breadfruit were approved for shredded tuna's chemical properties (carbohydrate, protein, and fiber).

scholarly journals PENGARUH WAKTU MASERASI TERHADAP AKTIVITAS ANTIOKSIDAN EKSTRAK DAUN PEGAGAN (Centella asiatica (L.) Urban)

2020 ◽  
Vol 9 (4) ◽  
pp. 482
Author(s):  
Ni Komang Trisna Rahayu ◽  
I Dewa Gede Mayun Permana ◽  
GA. Kadek Diah Puspawati
Keyword(s):  
Antioxidant Activity ◽  
Experimental Design ◽  
Leaf Extract ◽  
Centella Asiatica ◽  
Total Flavonoid ◽  
Time Duration ◽  
Time Treatment ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Effect On Yield

This research aimed to determine the effect of maceration time on the antioxidant activity of pegagan leaf extract and to determine the best maceration time with highest antioxidant activity of pegagan leaf extract. The experimental design used was Completely Randomized Design with maceration time duration there were 18, 24, 30, 36, 42, and 48 hours. All of the treatment repeated three times to obtained 18 units of experiments. The data analyzed by analyze of variance, if the treatment had a significant effect followed by The Duncan Test. The results showed that the maceration time treatment had a significant effect on yield, total phenolik, total flavonoid, total tannin and antioxidant activity of pegagan leaf extract. The 24 hour maceration time was the best treatment with antioxidant activity 66.67%, IC50 632.82 ppm, a yield of 24.30%, a total phenolik of 57.85 mgGAE / g, a total flavonoid of 105.28 mgQE / g. total tannin 54.09 mgTAE / g.

scholarly journals Efeito da nodulação natural no desenvolvimento de leguminosas em solos de cerrado no Tocantins

2012 ◽  
Vol 3 (1) ◽  
pp. 38-44 ◽  
Author(s):  
Aloísio Freitas Chagas Junior ◽  
Gil Rodrigues Dos Santos ◽  
Rogério Cézar de Lima Melo ◽  
Ariádila Gonçalves De Oliveira ◽  
Bruno Vizioli ◽  
...  
Keyword(s):  
Leucaena Leucocephala ◽  
Soil Samples ◽  
Soil Cultivation ◽  
Nodule Number ◽  
Randomized Design ◽  
Disturbed Areas ◽  
Degraded Area ◽  
Completely Randomized Design

Experiments were performed in a greenhouse to evaluate the effect of natural nodulation in the development of Pacara Earpod Tree (Enterolobium contorsiliquum) and Leucaena (Leucaena leucocephala) is soil with different uses in Tocantins. We used three soil samples of woods, cultivated areas four and in a degraded area, in pots in a completely randomized design with four replications. In both species nodulation was observed in all soils studies areas with better nodulation occurring in soil cultivation, providing a higher accumulation of biomass. Soil from the degraded area the two species showed nodule number and biomass of nodules significant, with potential for use in disturbed areas, with characteristics of degraded soils.

scholarly journals Time of introducing component crop influences productivity of intercropping system

2020 ◽  
Vol 55 (2) ◽  
pp. 10-25
Author(s):  
M. O. Iwuagwu ◽  
D. A. Okpara ◽  
C. O. Muoneke
Keyword(s):  
Experimental Design ◽  
Field Experiment ◽  
The Other ◽  
Growth And Yield ◽  
Pod Yield ◽  
South Eastern ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Cropping Seasons ◽  
Horticultural Research

Field experiment was conducted at National Horticultural Research Institute (NIHORT), Mbato Sub-station, Okigwe, Imo State, South-eastern Nigeria in the 2012 and 2013 cropping seasons to establish the most appropriate time to introduce component crops in cocoyam/cowpea mixture. Five different planting schemes (two and four weeks before, two and four weeks after and same day) and two cowpea genotypes (climbing Akidienu and erect IT97K-499-35) were used. The component crops were grown in monocultures to assess the productivity of the systems. The experimental design used was a completely randomized design with three replicates. Growth and yield of cocoyam and the cowpea genotypes increased significantly (P<0.05) when either of the component crops was planted earlier than the other. Intercropping reduced significantly (P<0.05) cocoyam yield by 0.7 − 74% in IT97K-499-35 and 22 − 80% in Akidienu. Sowing the cowpea genotypes the same day or before cocoyam resulted in over-yielding of cowpea, whereas sowing Akidienu and IT97K-499-35 after cocoyam caused pod yield reductions of 64% − 73% and 32% − 59% on average, respectively. Cocoyam planted two weeks before IT97K-499-35 produced more satisfactory yields of the intercrops than the other planting schedules with LER, LEC and ATER of 2.15, 1.03 and 1.57, respectively.

scholarly journals Nodulation and Development of Soybean Submitted to Inoculation With Bradyrhizobium japonicum and Phosphorus Doses

2018 ◽  
Vol 10 (12) ◽  
pp. 321 ◽  
Author(s):  
Erica Chaves ◽  
Rubson da Costa Leite ◽  
Thalita Rodrigues Silva ◽  
Thayny Alves Viana ◽  
Tatiane de Sousa Cruz ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Experimental Design ◽  
Bradyrhizobium Japonicum ◽  
Phosphate Fertilizer ◽  
Dry Mass ◽  
Root Number ◽  
Phosphate Fertilization ◽  
Soybean Plants ◽  
Biological Nitrogen ◽  
Plant Dry Mass

Among the several factors that may influence nodulation and the efficiency of biological nitrogen fixation for soybean plants, nutrient availability is among the most important. This study aimed to evaluate the inoculation with Bradyrhizobium japonicum and doses of phosphorus on the development of soybean in a Vertisol, in Tocantins. The experimental design was completely randomized in a 4 &times; 2 factorial scheme, with four replications. Four doses of phosphate fertilization (0, 100, 200, and 300 kg ha-1 P2O5) were studied, combined with two inoculation treatments with Bradyrhizobium japonicum (inoculated and not inoculated). The following variables were evaluated: plant height, stem diameter, nodules per plant, dry mass of nodules, dry mass of plant, dry mass of root, number of pods and number of grains per pod. Under greenhouse conditions and soil with good availability of phosphorus, there is no influence of the doses on the inoculation with Bradyrhizobium japonicum. Soils with good availability of phosphorus have low response to the application of phosphate fertilizer.

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