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 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 Increase in Milk Yield from Cows through Improvement of Forage Production Using the N2-Fixing Legume Leucaena leucocephala in a Silvopastoral System

Animals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 734
Author(s):  
Lucero Sarabia-Salgado ◽  
Francisco Solorio-Sánchez ◽  
Luis Ramírez-Avilés ◽  
Bruno José Rodrigues Alves ◽  
Juan Ku-Vera ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Milk Production ◽  
Leucaena Leucocephala ◽  
Crude Protein ◽  
Forage Yield ◽  
Silvopastoral System ◽  
Forage Production ◽  
N Transfer ◽  
Randomized Design ◽  
Completely Randomized Design

The objective was to evaluate milk production, N2-fixation and N transfer, forage yield and composition (under two cutting intervals) in a silvopastoral system (SPS) with Leucaena leucocephala-Megathyrsus maximus and M. maximus-monoculture (MMM) with crossbred cows in a completely randomized design. Forage yield in the SPS was 6490 and 6907 kg DM ha−1 for cutting intervals (CI) of 35 and 50 days. Forage yield for the MMM was 7284 and 10,843 kg DM ha−1, and forage crude protein (CP) was 29.0% and 26.1% for L. leucocephala, harvested at 35 and 50 days, respectively. CP for the associated M. maximus was 9.9% and 7.8% for CI 35 and 50 days, respectively, and for MMM was 7.4% and 8.4%, harvested at 35 and 50 days. Milk production was 4.7 kg cow−1 day−1 for cows grazing MMM and 7.4 kg cow−1 day−1 under SPS. Nitrogen fixation in L. leucocephala (%Ndfa) was estimated to be 89% and 95%, at 35 and 50 days, with an N2 transfer to the associated grass of 34.3% and 52.9%. SPS has the potential to fix and transfer important amounts of N2 to the associated grass, and increase forage CP content and milk production.

scholarly journals Superação de dormência e pré-germinação de sementes de Leucaena leucocephala

2021 ◽  
Vol 4 (3) ◽  
pp. 40-48
Author(s):  
Naiala da Hora Góes ◽  
◽  
Jacqueline de Brito Bispo ◽  
Taise Conceição Rodrigues ◽  
Manassés dos Santos Silva ◽  
...  
Keyword(s):  
Leucaena Leucocephala ◽  
Soft Drink ◽  
Water Immersion ◽  
Alternative Methods ◽  
Distilled Water ◽  
Randomized Design ◽  
Germination Speed ◽  
Completely Randomized Design

The objective of this study was to evaluate alternative methods to overcome dormancy in Leucena (Leucaena leucocephala) seeds. The seeds were collected from four different matrices and subsequently submitted to different treatments with mechanical scarification and immersion in water and soft drink at different times (0, 6, 24 and 48 h) at 25 ºC. A completely randomized design was used, consisting of 14 treatments composed of four replications containing 50 seeds each. The variables analyzed were: Germination at the first count (G); Normal Seedlings (PN); Hard or Dormant Seeds (SD); and Germination Speed Index (IVG). The results increased higher percentages of germination (G) in the T1 treatment (mechanical scarification) with 46.7 and 43.2% of normal seedlings (PN) with 43.2% and IVG of 41.9. However, when observing only the treatments submitted in different combinations, it was noted that the treatments T8 (Mechanical scarification and immersion in soda for 6h at 25 ºC) and T2 (Mechanical scarification and immersion in distilled water for 6h at 25 ºC) presented a germination of 44.7 and 39.7%, respectively. Thus, shorter water immersion times associated with mechanical scarification are required to obtain the highest percentage of germination and formation of normal seedlings.

scholarly journals Seleksi Mutan Tanaman Lamtoro (Leucaena leucocephala cv. Tarramba) Tahan Kutu Loncat terhadap Lingkungan Kering pada Rumah Kaca

2021 ◽  
Vol 19 (3) ◽  
pp. 90-94
Author(s):  
Rini Anggriani ◽  
P D M H Karti ◽  
I Prihantoro
Keyword(s):  
Gamma Rays ◽  
Leucaena Leucocephala ◽  
Stress Condition ◽  
Acid Stress ◽  
Stem Diameter ◽  
Randomized Design ◽  
Drought Resistant ◽  
Completely Randomized Design ◽  
Different Sources ◽  
Different Levels

Forage is the main source of feed for ruminants. Forage consists of two types, namely grass and legumes. Leguminosa is a type of forage as a source of protein. One type of legume that is well known by breeders in Indonesia is lamtoro (Leucaena leucocephala cv. Tarramba). This study was aimed to produce candidate mutants of lamtoro drought resistant to acid stress conditions. The experiment in this study used an unbalanced completely randomized design with 6 treatments of 740 different replications based on different sources of lamtoro plant mutants at different levels (P0: 0 n= 89, P1: 100 gy n= 82, P2: 200 gy n= 153, P3:300 gy n=120, P4: 400 gy n= 244, P5: 500 gy n= 52). Variables observed included plant height, number of stalks, leaf loss and stem diameter. The results showed that lamtoro plants irradiated with gamma rays at a level of 200 gy-500 gy were significantly higher than 100 gy irradiation at 10 and 12 days watering, but the diameter of the plants was larger at 100 gy irradiation. It can be watering intervals of 10 days and 12 days on the parameters of height and stem diameter showed that gamma rays irradiation of 400 gy resulted in dry-resistant lamtoro mutant candidates under acid stress condition. Key words:        gamma rays, lamtoro mutant,  watering interval

scholarly journals Bioassay for Determining Persistence of the Herbicide Saflufenacil in an Oxisol

2019 ◽  
Vol 37 ◽  
Author(s):  
F. DIESEL ◽  
M.M. TREZZI ◽  
R.A. VIDAL ◽  
M.V.J. BARANCELLI ◽  
P.H.F. MIZERSKI
Keyword(s):  
Cucumis Sativus ◽  
Beta Vulgaris ◽  
Dry Matter ◽  
Soil Samples ◽  
Cucumis Sativus L ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Stand Height ◽  
Herbicide Effects ◽  
Applied Knowledge

ABSTRACT: Persistence of an herbicide is defined as the ability to maintain the integrity of its molecule and chemical, physical, and phytotoxic properties in the environment where it was applied. Knowledge of persistence has implications both for the toxicity generated on species grown in succession and for the period in which the herbicide controls weeds. This study aimed to assess the persistence of the herbicide saflufenacil in an Oxisol by means of bioassays. Two experiments with the application of 29.4 g ha-1 of saflufenacil were carried out under field conditions: the first in the 2011/2012 season and the second in the 2012/2013 season. Soil samples were collected at depths of up to 10 cm at different times after application. Subsequently, two bioassays were carried out in a greenhouse by using beet (Beta vulgaris L.) and cucumber (Cucumis sativus L.) as bioindicators. The studies were carried out in a completely randomized design with four replications. Treatments consisted of periods after saflufenacil application (0, 5, 10, 15, 25, 35, 50, and 100 days). The crop was also considered as a factor. Stand, height, and phytotoxicity of plants were assessed in both agricultural seasons at 14, 21, and 28 days after sowing (DAS), as well as shoot fresh (SFM) and dry matter (SDM) at 28 DAS. In general, saflufenacil persistence was between 25 and 35 days. Beet was more sensitive to the presence of saflufenacil in the soil when compared to cucumber. Herbicide effects were higher in the 2012/2013 season when compared to the 2011/2012 season.

scholarly journals Nutrient dynamics with application of humic substances and liming in irrigated soil filled columns

2021 ◽  
Vol 42 (3Supl1) ◽  
pp. 1567-1578
Author(s):  
Cleire Oliveira ◽  
◽  
Rose Luiza Tavares ◽  
Renato Assis ◽  
Veridiana Cantão ◽  
...  
Keyword(s):  
Humic Acid ◽  
Fulvic Acid ◽  
Humic Substances ◽  
Nutrient Dynamics ◽  
Residual Effect ◽  
Soil Samples ◽  
Soil Conditions ◽  
P Release ◽  
Randomized Design ◽  
Completely Randomized Design

The objective of this work was to evaluate the retention of P, K, Ca and Mg nutrients, as well as pH and electrical conductivity in Oxisols. Soil samples were placed into columns, with addition of humic substances (soil with and without liming). The experiment was conducted in a greenhouse and the columns consisted of PVC tubes with 40 cm height x 5 cm diameter. The humic substances used were humic acid and fulvic acid, applied at rates of 0, 60, 120 and 240 L ha-1, in soil with or without lime. Ten irrigation events were performed, simulating 32 mm rainfall. After that, samples were collected from the columns, at 0-20 and 20-40 cm depths, to identify the residual effect of the addition of humic substances. A completely randomized design was used for this experiment, with 2×2×4 factorial statistical model and 3 replications. The results showed that, under acidic soil conditions, the use of fulvic acid provides more significant P release (up to 40%) in soil when compared to humic acid. When the rate of 240 L ha-1 is applied, the fulvic acid can release up to 83% of P in the soil.

scholarly journals Analisis Nilai pH dan Tingkat Kerusakan Silase Pakan Komplit yang Diformulasi Dengan Daun Lamtoro (Leucaena leucocephala) Sebagai Pakan Ternak Ruminasia

bionature ◽  
2019 ◽  
Vol 19 (2) ◽  
Author(s):  
M Nurul Qadarullah ◽  
Munir Munir ◽  
Irmayani Irmayani
Keyword(s):  
Leucaena Leucocephala ◽  
Ph Value ◽  
Real Effect ◽  
Ph Values ◽  
Damage Rate ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Different Levels ◽  
Average Damage

Abstract. The purpose of this study was to determine the effect of adding lamtoro leaves (leucaenanleucocephale) on pH values and the level of damage at different levels. This study used a completely randomized design (CRD) with 4 treatment levels and 3 replications, namely J0= lamtoro leaf 0%, J1= addition of lamtoro leaves 40%, J2=addition of lamtoro leaves 30%, J3=addition of lamtoroleaves 20%. The results showed that the addition of lamtoro leaves to feed silage has a very real effect. on average the highest to lowest pH value is J0 is (5.16), J1 is (3.83), J2 is (4.67), and J3 is (4.73). Average damage to the highest to lewest is J0 is (6.67), J1 is (1.76), J2 is (4.38), and J3 is (4.78). From the results of the study, it is known that the best treatment and recommended defects are J1 treatment with the addition of lamtoro leaves 40%. Keywords: pH, damage rate, complete feed silage, lamtoro leaf, and rice strawid

scholarly journals Traffic soil compaction of an oxisol related to soybean development and yield

2007 ◽  
Vol 64 (6) ◽  
pp. 608-615 ◽  
Author(s):  
Amauri Nelson Beutler ◽  
José Frederico Centurion ◽  
Maria Aparecida Pessoa da Cruz Centurion ◽  
Onã da Silva Freddi ◽  
Eurico Lucas de Sousa Neto ◽  
...  
Keyword(s):  
Root Development ◽  
Soil Compaction ◽  
Penetration Resistance ◽  
Soil Bulk Density ◽  
Soil Samples ◽  
The Other ◽  
Undisturbed Soil ◽  
Compacted Soil ◽  
Randomized Design ◽  
Completely Randomized Design

Excessive traffic on the soil may affect soybean development. This research was carried out to evaluate soybean root development and grain yield under compacted soil, in an Oxisol. The following traffic treatments were used: T0 = no traffic; T1* = 1 passage of a 4 t tractor; and, T1, T2, T4 and T6, respectively for 1, 2, 4 and 6 passages of an 11 t tractor on the same location, each besides the other. After compaction, soybean [Glycine max cv. MG/BR 46 (Conquista)] was cultivated. The experiment was arranged in a completely randomized design, with six compaction levels and four replicates (plots of 9.0 m²). Undisturbed soil samples were collected in the layers 0.03-0.06, 0.08-0.11, 0.15-0.18 and 0.22-0.25 m, for physical analyses. Root analyses were performed at layers of 0.0-0.10, 0.10-0.15 and 0.20-0.25 m. Soil compaction decreased deep root development and did not affect root amount, but its distribution. Yield decreased at the penetration resistance of 2.33 MPa or higher, and soil bulk density of 1.51 Mg m-3 or higher.

scholarly journals In Vitro protein digestibility and fermentability of mulberry (Morus alba)-Leucaena foliage mixed feed

2016 ◽  
Vol 21 (1) ◽  
pp. 9
Author(s):  
Dwi Yulistiani ◽  
Z. A. Jelan ◽  
J. B. Liang
Keyword(s):  
Leucaena Leucocephala ◽  
Protein Digestibility ◽  
Gas Production ◽  
Mixed Feed ◽  
Dry Matter Digestibility ◽  
Randomized Design ◽  
In Vitro Gas Production ◽  
Production Study ◽  
Completely Randomized Design

<p class="abstrak2">This experiment was carried out to determine the effect of mulberry-leucaena foliage mixed feed on protein digestibility and VFA production using an in vitro gas production study. Mulberry was mixed with one of 2 leucaena varieties (<em>Leucaena leucocephala</em> hybrid and <em>Leucaena leucocephala</em> local) at 3 levels (0, 25 and 50%). Study was conducted in completely randomized design. Mulberry foliage, leucaena and mixtures of mulberry-leucaena were incubated for 24 hours in glass syringes. Parameter recorded were gas production, in vitro true dry matter digestibility (IVTDMD), in vitro N digestibility (IVND) and VFA production. Results of the study showed that supplementation of leucaena to mulberry decreased IVOMD, gas production and protein digestibility in the rumen buffered medium. The mixture of mulberry and leucaena hybrid at ratio 50% resulted in the lowest IVND than other treatment. However it increased protein digestibility in acid pepsin incubation as an estimate of protein availability in intestine. Gas production decreased in mulberry leucaena mixtures was followed by decreased total VFA production. Tannin derived from leucaena hybrid supplementation to mulberry at ratio 1 : 1 was most effective to decrease protein digestion in the rumen and to increase protein digestibility in acid pepsin incubation. In conclusion mixing of hybrid leucaena hybrid with mulberry foliage was able to protect protein degradation from mulberry in the rumen.</p>

scholarly journals APPLICATION OF DIFFERENT P FERTILIZATION ON THE GROWTH AND NODULES OF Pueraria javanica INOCULATED WITH ARBUSCULAR MYCHORRIZA FUNGY IN ULTISOL

Pastura ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 1
Author(s):  
Simel Sowmen ◽  
Ifradi Ifradi ◽  
Arif Rachmat ◽  
Tri Silfani ◽  
Karyadinata Karyadinata
Keyword(s):  
Data Analysis ◽  
Rock Phosphate ◽  
Root Nodule ◽  
P Fertilization ◽  
Nodule Number ◽  
Randomized Design ◽  
Number Of Leaves ◽  
Mycorrhizal Inoculation ◽  
Completely Randomized Design ◽  
Number Of Branches

This research was aims to assess effect of the different phospor fertilizer on the growth and nodules in Pueraria javanica inoculated with Arbuscular Fungi Micorrhyza. This experimental design was Completely Randomized Design (CRD) with three phospor fertilizer treatments: P0 = 0 kg/ha phosphor (0, g/pot), P1 = SP36 200 kg/ha (1 g/pot), and P2 = rock phosphate 200 kg/ha (1 g/pot), with four replicates. The whole pot treatments received mycorrhizal inoculation. The variables measured were plant height, number of leaves, number of branches, root length, number of root nodule, number of active nodules , and the percentage of active nodules. The results of data analysis show that the treatment has no effect (P > 0.05) for all parameters. The results showed that the presence of mycorrhizal inoculation, macro and micronutrient elements of Pueraria javanica already fulfilled without phosporus fertilizing in ultisol. Key words: AMF, phosphor, Root nodule, rock phosphate, Pueraria javanica

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