scholarly journals Evaluation of Transplant Fertility of Short-day Onions in Southeast Georgia

HortScience ◽  
2002 ◽  
Vol 37 (4) ◽  
pp. 651-655
Author(s):  
George E. Boyhan ◽  
Reid L. Torrance ◽  
David E. Curry ◽  
Pamela M. Lewis ◽  
Donna O. Linton ◽  
...  
Keyword(s):  
Plant Height ◽  
Linear Increase ◽  
Residual Phosphorus ◽  
High Phosphorus ◽  
Phosphorus Fertilizers ◽  
Linear Effects ◽  
Plant Stand ◽  
Tissue Nitrogen ◽  
Phosphorus Levels ◽  
Tissue Phosphorus

Preplant levels of 5N-4.4P-12.4K (-5S or -9S) and sidedress applications of CaNO3 were evaluated in onion (Allium cepa L.). In addition, high phosphorus fertilizers 18N-20.1P-0K (diammonium phosphate) and liquid 10N-14.8P-0K were evaluated on sites with and without high residual phosphorus levels as well as their interaction with onion cultivars. Sidedress applications of CaNO3 had a significant effect on plant height and an interaction with preplant 5N-4.4P-12.4K fertilizer. There was a linear increase in plant height with increasing applications of 5N-4.4P-12.4K from 0 to 1569 kg·ha-1 with the CaNO3 applications. Neither 5N-4.4P-12.4K nor CaNO3 applications affected stand count. 5N-4.4P-12.4K fertilizer had significant linear effects on tissue potassium and sulfur. Tissue nitrogen and calcium increased with CaNO3 applications while phosphorus, potassium, and sulfur decreased. CaNO3 also had a positive effect on suitability for transplanting. There was an interaction effect between 5N-4.4P-12.4K and CaNO3 for tissue phosphorus levels. There was a linear decrease in tissue phosphorus levels with increasing amounts of 5N-4.4P-12.4K fertilizer with the sidedress CaNO3 treatments. High phosphorus fertilizers applied directly after seeding had no effect on plant stand or plant height either on soils with or without high residual phosphorus in 1998. In 1999, 10N-14.8P-0K fertilizer had a significant effect on plant height while 18N-20.1P-0K did not. Based on this study, we conclude that additional applications of high phosphorus fertilizers applied post seeding are not required due to the relatively warm conditions found in southeast Georgia in September. There were differences between cultivars, but cultivar× high phosphorus fertilizer interactions were nonsignificant.

scholarly journals Evaluation of Plant-bed Fertility in Vidalia Onions

HortScience ◽  
2000 ◽  
Vol 35 (4) ◽  
pp. 560C-560b
Author(s):  
George Boyhan ◽  
Reid Torrance ◽  
David Curry ◽  
Pam Lewis ◽  
Mindy Linton
Keyword(s):  
Plant Height ◽  
Factorial Experiment ◽  
Phosphorus Fertilizer ◽  
Foliar Nitrogen ◽  
Residual Phosphorus ◽  
Nitrogen Levels ◽  
High Phosphorus ◽  
Phosphorus Fertilizers ◽  
Current Fertility ◽  
Very High

In 1998–99, experiments were conducted to evaluate current fertility practices with plant-bed onions. In experiments in 1998 and 1999, a factorial experiment of preplant 5–10–15 and CaNO3 sidedressing indicated that CaNO3 had a significant effect on foliar nitrogen levels. CaNO3 also had an effect on stand count in 1998, but not in 1999. CaNO3 and 5–10–15 had an effect on plant height in both 1998 and 1999, with an interaction between 5–10–15 and CaNO3 in 1999. In 1999, transplants were also evaluated on an acceptability scale with 5–10–15 and CaNO3 rates resulting in significant differences in transplant acceptability. Postseedling applications of high phosphorus fertilizer were also evaluated. There were no consistent improvements in transplant growth with applications of high phosphorus fertilizers, such as 18–46–0 or 10–34–0, either on soils with very high residual phosphorus (242 lb/acre) or medium residual phosphorus (50 lb/acre). In addition, variety was not a factor in these responses.

scholarly journals Effect of Phosphorus Levels on Soil Properties and Plant Tissues of Two Nerica Varieties

2018 ◽  
pp. 1-9
Author(s):  
Etabo E. Mathew ◽  
Wekha N. Wafula ◽  
Nicholas K. Korir ◽  
J. P. Gweyi-Onyango
Keyword(s):  
Soil Properties ◽  
Plant Tissue ◽  
Block Design ◽  
Rice Variety ◽  
Application Rate ◽  
Control Treatment ◽  
Rice Varieties ◽  
Tissue Nitrogen ◽  
Phosphorus Levels ◽  
Tissue Phosphorus

Phosphorus levels in the soil are easily fixed and rendered unavailable to plants even if they are found to be high and therefore, its influence on uptake of other nutrients such as nitrogen, and potassium cannot be overemphasized. In that view, an experiment was set out at KALRO-Mwea to investigate on the effect of phosphorus levels on soil properties and plant tissue nutrient contents of Nerica rice variety. The experiment was laid out in a Randomized Complete Block Design in split-split plot arrangement and replicated thrice. Two rice varieties (Nerica 11 and Nerica 4) formed the main plots and 4 phosphorus levels (0 kg P/ha, 25 kg P/ha, 50 kg P/ha and 75 kg P/ha) formed the sub plots. Highest net pH decreases of 0.20 and 0.22 units were recorded at 75 Kg haˉ¹ P2O5 in season 1 and season 2 respectively, while the lowest net decreases of 0.12 and 0.16 were elicited at 50 Kg haˉ¹ P2O5 treatment in season 1 and season 2 respectively. A net decrease was observed in all the CEC levels where phosphorus was applied in all the seasons in which the highest net decrease of 1.09 and 1.03 during season 1 and 2 respectively was elicited on the control treatment, while the lowest net decrease of 0.61 and 0.59 was elicited by the 50 Kg haˉ¹ P2O5 rate in season 1 and 2 respectively. There was an inverse relationship exhibited between the phosphorus level of applications and the soil phosphorus net decrease across the two seasons. The net decrease was highest at 0 Kg haˉ¹ P2O5 and increased significantly with increasing phosphorus rate. That content of soil nitrogen were low with a marginal increase recorded with application of phosphorus across the seasons. The highest net increase of 0.05% was observed at the 75 Kg haˉ¹ P2O5 rate and control in season 1 while the application rate of 50 Kg haˉ¹ P2O5 had the lowest net increase of 0.02% in season 2. Highest mean plant-tissue phosphorus of 62.05 ppm was recorded in Nerica 4 under 75 kg P/ha treatment. Highest plant tissue nitrogen of 0.686% and 0.713% for Nerica 4 and 11 respectively were elicited at 75 kg haˉ¹ P2O5  in season 1, whereas in season 2 the highest plant tissue nitrogen of 0.721% and 0.691% at 75 kg haˉ¹ P2O5  for Nerica 11 and 4 respectively was recorded. Application of phosphorous led to the highest plant-tissue phosphorus in both seasons indicating the importance of proper P fertilizer application where from this study 50-75 kg haˉ¹ P2O5 rate is recommended in rice growing.

scholarly journals Apparent digestibility of pacu (Piaractus mesopotamicus) diets containing different levels of phosphorus

2015 ◽  
Vol 36 (6Supl2) ◽  
pp. 4453
Author(s):  
Juliana Alice Lösch Nervis ◽  
Aldi Feiden ◽  
Evandro Bilha Moro ◽  
Marlon Casarini Moreno ◽  
Sidnei Klein ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Total Phosphorus ◽  
Linear Increase ◽  
Available Phosphorus ◽  
Composition Analysis ◽  
Apparent Digestibility ◽  
Residual Phosphorus ◽  
Piaractus Mesopotamicus ◽  
Different Levels ◽  
Phosphorus Levels

The present study aimed to evaluate pacu (Piaractus mesopotamicus) diets and determine the apparent digestibility at different levels of phosphorus using the feces collection method with an intestinal dissection marker. A total of 320 pacu with average weights of 768.5±36.34 g were used, and they were distributed in four 5 m³ net cages. The fish were fed isonitrogenous (27%), isoenergetic (3000 kcal/kg) and isocalcium (1.50%) diets with total phosphorus levels of 0.6, 0.8, 1.0 and 1.2%. The fish were incised with lateral openings to allow for feces removal from the rectum, and the fish were then sent for carcass chemical composition analysis. Significant differences were observed (P<0.01) between treatments for the apparent diet digestibility, apparent phosphorous digestibility, available phosphorus and residual phosphorus. There was a linear decrease in apparent diet digestibility and apparent phosphorus digestibility with increasing levels of phosphorous in the diet, and the highest values were observed for the diet with 0.6% total phosphorus. For available phosphorus and residual phosphorus, there was a linear increase based on total phosphorus levels in the diet. No significant differences were observed for the chemical composition of the pacu carcasses. Therefore, the greatest digestibility of total phosphorus in the diet obtained through dissection was observed in the diet containing 0.6% total phosphorus, and the different levels of phosphorus did not influence the chemical composition of the pacu carcasses.

scholarly journals Apparent digestibility of pacu (Piaractus mesopotamicus) diets containing different levels of phosphorus

2015 ◽  
Vol 36 (6Supl2) ◽  
pp. 4453
Author(s):  
Juliana Alice Lösch Nervis ◽  
Aldi Feiden ◽  
Evandro Bilha Moro ◽  
Marlon Casarini Moreno ◽  
Sidnei Klein ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Total Phosphorus ◽  
Linear Increase ◽  
Available Phosphorus ◽  
Composition Analysis ◽  
Apparent Digestibility ◽  
Residual Phosphorus ◽  
Piaractus Mesopotamicus ◽  
Different Levels ◽  
Phosphorus Levels

<p>The present study aimed to evaluate pacu (<em>Piaractus mesopotamicus</em>) diets and determine the apparent digestibility at different levels of phosphorus using the feces collection method with an intestinal dissection marker. A total of 320 pacu with average weights of 768.5±36.34 g were used, and they were distributed in four 5 m³ net cages. The fish were fed isonitrogenous (27%), isoenergetic (3000 kcal/kg) and isocalcium (1.50%) diets with total phosphorus levels of 0.6, 0.8, 1.0 and 1.2%. The fish were incised with lateral openings to allow for feces removal from the rectum, and the fish were then sent for carcass chemical composition analysis. Significant differences were observed (P&lt;0.01) between treatments for the apparent diet digestibility, apparent phosphorous digestibility, available phosphorus and residual phosphorus. There was a linear decrease in apparent diet digestibility and apparent phosphorus digestibility with increasing levels of phosphorous in the diet, and the highest values were observed for the diet with 0.6% total phosphorus. For available phosphorus and residual phosphorus, there was a linear increase based on total phosphorus levels in the diet. No significant differences were observed for the chemical composition of the pacu carcasses. Therefore, the greatest digestibility of total phosphorus in the diet obtained through dissection was observed in the diet containing 0.6% total phosphorus, and the different levels of phosphorus did not influence the chemical composition of the pacu carcasses. </p>

MO775CONTROL OF BONE DISEASE ASSOCIATED WITH CHRONIC KIDNEY DISEASE AS A PREDICTOR OF PRIMARY PERMEABILITY AFTER THE CREATION OF THE VASCULAR ACCESS

2021 ◽  
Vol 36 (Supplement_1) ◽  
Author(s):  
Luis Guillermo Piccone Saponara ◽  
Maria Paz Castro Fernández ◽  
Nancy Giovanna Uribe Heredia ◽  
Agustin Carreno ◽  
Sara Anaya Fernandez ◽  
...  
Keyword(s):  
Antiplatelet Therapy ◽  
Vascular Access ◽  
Statistical Significance ◽  
Univariate Analysis ◽  
Primary Patency ◽  
Categorical Variables ◽  
Cross Sectional ◽  
High Phosphorus ◽  
The Creation ◽  
Phosphorus Levels

Abstract Background and Aims Clinical practice guidelines recommend an arteriovenous fistula (AVF) as the preferred vascular access for hemodialysis. Patency of the arteriovenous access is important for effective hemodialysis. However, maintaining the patency of the AVF remains a challenge. We determined those independent prognostic factors for the patency of the AVF at the time of its creation. Method Cross-sectional study; We include all AVFs performed at the HGUCR in the last 2 decades. Demographic variables (age, sex), etiology of CKD and associated comorbidity were collected. We determine the factors involved in the primary patency of AVFs. Statistical analysis with SPSS 25.0. Categorical variables are expressed as percentages and are compared using the Chi2 test. Quantitative variables are expressed as mean ± standard deviation and the Mann Whitney Student-T/U was used to compare them. Statistical significance for a value of p &lt;0.05. Results 622 AVFs performed in 482 patients were reviewed. 86.8% were autologous. The mean age was 65.4±14 years; 66.6% were male. The most frequent etiologies of CKD were diabetic nephropathy (30.2%), unknown (18%), and glomerulonephritis (16.6%). 91.2% had arterial hypertension (HBP) and diabetes mellitus (DM) 47.9%. 48.7% received antiplatelet therapy and 15.6% anticoagulation prior to the creation of the AVF. 27% presented primary failure. The univariate analysis showed statistical significance for the qualitative variables HTA (p=0.002), treatment with statins (p&lt;0.01) and antiplatelet (p&lt;0.01), and for the quantitative variables fibrinogen (p=0.048), serum phosphorus (p=0.001), CRP (p=0.004), triglycerides (p=0.05), ferritin (p=0.006) and age (p=0.05). When performing a multivariate analysis using logistic regression, HTA (OR: 0.46 95% CI 0.22-0.95 p = 0.036), high phosphorus levels (OR: 1.22 95% CI 1.08-1, 49 p = 0.004) and statin treatment (OR: 0.58 95% CI 0.36-0.96 p = 0.004) are predictors of primary VA failure. Conclusion In our study, HTA and antiplatelet therapy prior to the creation of the VA behave as protective factors for primary failure, with high phosphorus levels being an independent factor for primary failure of AVFs.

scholarly journals Growth dynamics of morphological and reproductive traits of Physalis peruviana L. M1 plants obtained from seeds irradiated with gamma rays

2020 ◽  
Vol 48 (1) ◽  
pp. 200-209
Author(s):  
Oscar M. ANTÚNEZ-OCAMPO ◽  
Serafín CRUZ-IZQUIERDO ◽  
Leopoldo E. MENDOZA-ONOFRE ◽  
Manuel SANDOVAL-VILLA ◽  
Amalio SANTACRUZ-VARELA ◽  
...  
Keyword(s):  
Plant Height ◽  
Gamma Rays ◽  
Growth Dynamics ◽  
Reproductive Traits ◽  
Linear Increase ◽  
Stem Diameter ◽  
Experimental Unit ◽  
Physalis Peruviana ◽  
Floral Buds ◽  
Recorded Data

There is an increasing interest in the development of uchuva (Physalis peruviana L.) cultivars adapted to greenhouse farming. Sexual behavior makes it difficult to obtain uniform commercial uchuva cultivars by conventional breeding methods. Mutations induced by gamma rays is an alternative approach. M1 plants derived from 14 irradiation 60Co doses, from 0 to 275 Gy, that were applied to uchuva seeds were evaluated. Recorded data included days to first flower and growth dynamics (four to seven samplings) of morphological traits (plant height, stem diameter, basal stems) and reproductive traits (floral buds, flowers and green fruits). Treatments were distributed in a completely randomized blocks experimental design with six replications, in a greenhouse. The experimental unit was a single M1 plant. Statistical differences were found for irradiation doses, growth samplings, and its interaction. Growth dynamics results indicate that all traits showed a linear increase with plant age (R2 = 0.92* to 0.98**), but the effect of the irradiation doses on morphological and reproductive traits was no linear. Irradiation reduced plant height by 79%. M1 plants developed from irradiated seeds at doses of 125, 175 and 200 Gy showed greater stem diameter, with more basal stems, floral buds, flowers and green fruits than the control. It is concluded that intermediate irradiation doses had a stimulating effect on vegetative growth and fruiting traits of M1 uchuva plants.

scholarly journals Efficacy of organomineral fertilizers derived from biosolid or filter cake on early maize development

2019 ◽  
pp. 662-670
Author(s):  
Mara Lúcia Martins Magela ◽  
Reginaldo de Camargo ◽  
Regina Maria Quintão Lana ◽  
Melissa Cristina de Carvalho Miranda ◽  
Raquel Pinheiro da Mota
Keyword(s):  
Organic Matter ◽  
Plant Height ◽  
Dry Matter ◽  
Filter Cake ◽  
Block Design ◽  
Linear Increase ◽  
Mineral Fertilization ◽  
Fresh Matter ◽  
High Productivity ◽  
Stalk Diameter

In the current world scenario of agriculture it is necessary to find technologies to reach high productivity that are effective in providing soil conditioning improvement for the plants. Thus, this study analyzed the efficacy of organomineral fertilizers formulated with different organic matter sources on growth factors of maize. The experiment was done in a greenhouse at Campus Umuarama, Federal University of Uberlândia-MG, in a randomized block design, as a 2 x 5 + 2 factorial, containing two sources of organic matter, biosolid and filter cake, five doses of P2O5 recommendation for the crop and two additional treatments: mineral fertilization (100% of P2O5 of the recommended dose) and a control (no fertilizer), with four replications. Plant height, stalk diameter, and chlorophyll a and b were determined at 35 days after sowing (DAS); plant height, stalk diameter, shoot and root fresh and dry matter were determined at 65 DAS. The organomineral sources with biosolid and filter cake yielded greater height and diameter at 35 DAS than those of mineral fertilization. Regardless of the fertilizer organic matter source, stalk diameter at 35 DAS presented linear increase with increasing doses of the fertilizer sources. The use of fertilizer based on biosolid resulted in greater shoot fresh matter than the filter cake source, regardless of dose applied. In general, greater results were obtained for root fresh and dry matter at the greater fertilizer doses in comparison with the mineral fertilization. Organomineral fertilizers can be a viable alternative for partial or total substitution of mineral fertilization, since similar or better results were found for maize growth characteristics.

scholarly journals Evaluation of Different Vaireties of Onion and their Transplanting Times for Off-season Production in Mid Hills of Nepal

1970 ◽  
Vol 7 ◽  
pp. 21-26 ◽  
Author(s):  
IP Gautam ◽  
B Khatri ◽  
GP Paudel
Keyword(s):  
Plant Height ◽  
Local Market ◽  
Ecological Research ◽  
Plot Size ◽  
Research Journal ◽  
Novel Technology ◽  
Significant Difference ◽  
Neck Thickness ◽  
Plant Stand ◽  
Bulb Yield

A field experiment was conducted at the agro-ecological research site (AER site) of the RegionalAgriculture Regional Station, Lumle, at Deurali in Palpa (1200 masl) during rainy season of2004 and 2005. The main objective of the experiment was to evaluate the different varieties ofonion and their transplanting time for off-season production in mid hill conditions. Treatmentswere four onion varieties, namely LR-241, N-53, Nasik Red and Red Creole and four transplantingdates as 25 July, 5 August, 15 August, and 25 August. The trial was conducted in RCBD withfactorial arrangement of treatments and replicated three times considering farmer as a replication.The plot size was maintained 1.4 m2 (1.4 x 1 m2). Observation was recorded on plant height, plantstand at maturity, diameter and length of bulbs, neck thickness and yield of green bulbs and greentops. The varieties showed a significant different only on the fresh bulb production. Transplantingdates showed a significant difference on the plant height, plant stand at maturity and marketablebulb production. The highest fresh bulb yield (16.63 t ha-1) observed on the variety N-53. Similarly,August 15 transplanting date produced the highest bulb yield (15.31 t ha-1) among four transplantingdates. This novel technology for off-season onion bulb production through seedlings would be goodopportunity for increasing the income of many hill farmers which have no access to low land andirrigation facility during normal onion production season. The production of green tops in this periodis consumable and easily saleable in the local market. So farmers get extra income from thistechnology.Key words: Bulb yield; off-season onion; transplanting date; varietiesDOI: 10.3126/narj.v7i0.1862Nepal Agriculture Research Journal Vol.7 2006 pp.21-26

Environmental pH influences growth and tissue chemistry of the submersed macrophyte Vallisneria americana

1986 ◽  
Vol 64 (2) ◽  
pp. 306-310 ◽  
Author(s):  
David Grisé ◽  
John E. Titus ◽  
Daniel J. Wagner
Keyword(s):  
Dry Matter ◽  
Dry Matter Accumulation ◽  
Vallisneria Americana ◽  
Growth Reduction ◽  
Nitrogen And Phosphorus ◽  
Tissue Calcium ◽  
Tissue Nitrogen ◽  
Freshwater Macrophyte ◽  
Phosphorus Levels ◽  
Tissue Chemistry

Wild celery (Vallisneria americana, Hydrocharitaceae) is a common submersed freshwater macrophyte rarely reported from lakes with pH below 6. Plants grown in a greenhouse on a uniform sediment within pH-controlled tanks all survived 60 days at pH 5 but showed reduced dry matter accumulation (by 76%), leaf area (by 79%), and rosette and winter bud production (by 44 and 63%, respectively) compared with plants grown at pH 7.5. The sensitivity of this plant to only moderate acidity did not differ for plants in water acidified to pH 5 by a combination of H2SO4 and HNO3 or by HCl, indicating that the former acids exerted no fertilizing effects to counter the detrimental influence of acidification. Tissue nitrogen and phosphorus levels were well above the critical concentrations previously reported for this species. Tissue calcium and manganese concentrations showed no clear relationship to treatment pH. Both aluminum and iron levels in tissues were twofold to threefold higher for the smaller plants grown at pH 5 (means of 1970 and 3090 μg/g, respectively), suggesting that metal toxicity may have caused growth reduction at low pH.

scholarly journals Influence of High Phosphorus Levels in Caged Layer Diets

1965 ◽  
Vol 44 (5) ◽  
pp. 1249-1253 ◽  
Author(s):  
R.H. Harms ◽  
B.L. Damron ◽  
P.W. Waldroup
Keyword(s):  
High Phosphorus ◽  
Phosphorus Levels
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