scholarly journals MODEL TO ESTIMATE NUTRITIONAL AND NON-NUTRITIONAL LIMITATIONS OF ‘PRATA-ANÃ’ BANANA CROPS GROWN IN DIFFERENT ENVIRONMENTS

2021 ◽  
Vol 34 (1) ◽  
pp. 58-67
Author(s):  
VAGNER ALVES RODRIGUES FILHO ◽  
JÚLIO CÉSAR LIMA NEVES ◽  
SÉRGIO LUIZ RODRIGUES DONATO
Keyword(s):  
Crop Yields ◽  
Reference Population ◽  
Biotic Factors ◽  
Nutritional Evaluation ◽  
Nutritional Factors ◽  
Nutrient Contents ◽  
The Third ◽  
Banana Crops ◽  
Nutritional Balance ◽  
Banana Crop

ABSTRACT The obtaining of a high banana yield requires that nutrients are in adequate quantities and proportions in the plant. Therefore, the use of methods that encompass nutritional balance and equilibrium is required for a good nutritional evaluation. The objective of this work was to model and determine nutritional and non-nutritional limitations of 'Prata-Anã' banana grown in the states of Ceará (CE) and Bahia (BA), Brazil, based on nutritional balance and equilibrium. The study was developed using the databank of leaf nutrient contents and banana yields of two farms of the Sítio Barreiras company, in Missão Velha (CE) and Ponto Novo (BA), Brazil. The parcels with banana yield above the average plus 0.5 standard deviation; and parcels with banana yield below of that limit were defined as low-yield areas and were used for nutritional diagnosis. The databank was divided into four: the first with 253 samples and a reference population with banana yield above 39.81 Mg ha-1 year-1; the second with 553 samples and a low-yield population (Ceará); the third with 147 samples and a reference population with banana yield above 41.69 Mg ha-1 year-1; and the fourth with 334 samples and a low-yield population (Bahia). Yield limitations in the 'Prata-Anã' banana crops due to nutritional causes reached 13.37% in Ceará, and 12.17% in Bahia. Non-nutritional factors, such as climate and biotic factors, limited the banana crop yields by up to 28.23% in Ceará, and 50.49% in Bahia.

scholarly journals Model for determining nutritional and non-nutritional limitations of Grande Naine banana in the Brazilian semiarid region

2021 ◽  
Vol 25 (8) ◽  
pp. 538-546
Author(s):  
Vagner A. Rodrigues Filho ◽  
Júlio C. L. Neves ◽  
Sérgio L. R. Donato ◽  
Bruno V. C. Guimarães
Keyword(s):  
Crop Yield ◽  
Plant Nutrition ◽  
Reference Population ◽  
Semiarid Region ◽  
Nutritional Factors ◽  
The Third ◽  
Brazilian Semiarid ◽  
Standard Deviations ◽  
Nutritional Balance

ABSTRACT Plant nutrition is essential in attaining higher yields; however, non-nutritional factors play a major role in limiting crop yield. This study aimed to model and determined nutritional and non-nutritional limitations of Grande Naine banana grown in Ceará and Bahia states, Brazil, based on nutritional balance and equilibrium. The data used in this study were collected between 2010 and 2017 from two farms, located in Missão Velha, Ceará (7° 35’ 90” S and 39° 21’ 17” W, and 442 m of altitude), and Ponto Novo, Bahia (10º 51’ 46” S and 40º 08’ 01” W, and 342 m of altitude). Plots with yields greater than the average plus 0.5 standard deviations were defined as high-yielding populations (HYP) and used as a reference population to establish the norms. Plots with yields below this limit, low-yielding populations (LYP), were used for nutritional diagnosis. The database was divided into four. The first and second databases, from the area located in Missão Velha, contained 46 samples from a reference population with a yield greater than 58.84 t ha-1 per year, and 104 samples from an LYP, respectively. The third and four databases, from the area located in Ponto Novo, contained 19 samples from a reference population with a yield greater than 76.12 t ha-1 per year, and 46 samples from an LYP, respectively. Nutritional factors limited Grande Naine banana yield in Ceará and Bahia by 11.17 and 14.79%, while non-nutritional factors limited by 30.11 and 29.41%, respectively. In Grande Naine banana, non-nutritional factors are more yield-limiting than nutritional factors.

SOIL CONDITIONERS—THEIR EFFECT ON COARSE-TEXTURED SOILS, CROP YIELDS AND COMPOSITION

1957 ◽  
Vol 37 (2) ◽  
pp. 102-112
Author(s):  
R. M. Holmes ◽  
S. J. Toth
Keyword(s):  
Structural Changes ◽  
Crop Yields ◽  
Cultural Practices ◽  
Sandy Soils ◽  
Growing Season ◽  
Soil Aggregate ◽  
Crop Response ◽  
The Third ◽  
Soil Conditioners ◽  
The Stability

Crop response to soil structural changes caused by soil conditioner amendments was studied in several different sandy soils of New Jersey. The response varied with the crop and treatment. Those chemicals that were slightly hydrophobic were most effective and generally crop response was greatest on these treatments. Cations such as Na may be added in large amounts as part of some conditioners, and this may result in reduced uptake of other nutrients such as Mg. and K. Except for this effect, conditioners did not reduce nutrient uptake by plants. When elements such as Na and N are added in large amounts as part of some conditioners, there may be an increased uptake of these nutrients.Catalin and VAMA conditioners produced a dry surface mulch which appeared to reduce evaporation. Moisture reserves were, therefore, preserved through a drought and this resulted in increased growth of crops over those grown on other treatments. Cultural practices destroyed the stability of the conditioned aggregates, since in most cases the effect had largely disappeared by the third growing season. Chemicals which were effective in soil aggregate stabilization were also effective as anti-crustants when crusting was a problem.

scholarly journals NUTRITIONAL EVALUATION OF TILAPIA FILLETING WASTE MEAL FOR SWINE IN THE NURSERY PHASE

2016 ◽  
Vol 29 (2) ◽  
pp. 473-480 ◽  
Author(s):  
EDSON RICHART ◽  
RICARDO VIANNA NUNES ◽  
LEANDRO DALCIN CASTILHA ◽  
YOLANDA LOPES DA SILVA ◽  
PAULO SEGATTO CELLA
Keyword(s):  
Initial Phase ◽  
Average Daily Gain ◽  
Basal Diet ◽  
Nutritional Composition ◽  
Metabolizable Energy ◽  
Feed Conversion ◽  
Nutritional Evaluation ◽  
Ileal Digestibility ◽  
The Third ◽  
Daily Gain

ABSTRACT: Three experiments were conducted to determine the nutritional composition of tilapia filleting waste meal (TFWM) for pigs in the initial phase. In the first experiment, the chemical composition and the values of digestible and metabolizable energy of TFWM were determined using 10 pigs (15.10 ± 0.74 kg), distributed in cages for metabolic research (2 treatments X 5 replicates). The TFWM replaced 20% of the reference diet based on corn and soybean meal. In the second experiment, the ileal digestibility coefficients of amino acids present in TFWM were determined, using chromic oxide as a marker, through the method of sacrifice, using 10 pigs (15.00 ± 0.27 kg), distributed in cages for metabolic research (2 treatments X 5 replicates). Treatments consisted of a basal diet and one without protein. In the third experiment, the performance of pigs fed diets containing different concentrations of TFWM (0, 5, 10, 15 and 20%) was evaluated. Forty pigs (15.00 ± 0.87 kg), distributed in pairs in nursery pens (5 treatments X 4 replicates) were used. The values of digestible and metabolizable energy corresponded to 3,632 and 3,260 kcal/kg, respectively. Inclusion of up to 10% TFWM in the diet of barrows from 15 to 30 kg did not affect the average daily gain and feed conversion of the animals.

scholarly journals Planned Application of Sewage Sludge Recirculates Nutrients to Agricultural Soil and Improves Growth of Okra (Abelmoschus esculentus (L.) Moench) Plants

2022 ◽  
Vol 14 (2) ◽  
pp. 740
Author(s):  
Ebrahem M. Eid ◽  
Kamal H. Shaltout ◽  
Saad A. M. Alamri ◽  
Sulaiman A. Alrumman ◽  
Mostafa A. Taher ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Crop Yields ◽  
Growth Parameters ◽  
Low Cost ◽  
Organic Fertilizer ◽  
Abelmoschus Esculentus ◽  
Total Biomass ◽  
Nutrient Contents ◽  
Absolute Growth ◽  
Safe Limits

The aim of this study was to investigate the feasibility of using sewage sludge (SS) biosolids as a low-cost soil fertilizer to improve soil characteristics and crop yields. Okra (Abelmoschus esculentus (L.) Moench) plants were grown in soil supplemented with different concentrations of SS (0, 10, 20, 30, 40, and 50 g/kg). The results showed that SS soil application led to improved soil quality with a 93% increase of organic matter (at SS dose of 10 g/kg), decreased pH (a reduction from 8.38 to 7.34), and enhanced macro- and micro- nutrient contents. The levels of all the investigated heavy metals (HMs; Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, and Zn) in the postharvest SS-amended soil were within the prescribed safe limits. The application of SS to soil considerably enhanced the growth parameters of okra plants. Total biomass increased 13-fold and absolute growth rate increased 10-fold compared to plants grown in nonamended (control) soils. Among the applied SS doses, the 10 g/kg SS dose led to the highest values of the measured growth parameters, compared to those of plants grown in control soils. The induced growth at 10 g/kg SS was accompanied by a substantial increase in metal content in roots, stems, leaves, and fruits; however, all levels remained within safe limits. Consequently, the data presented in this study suggest that SS could be used as a sustainable organic fertilizer, also serving as an ecofriendly method of SS recycling.

Redial generations ofFasciola hepatica: a review

2009 ◽  
Vol 83 (3) ◽  
pp. 245-254 ◽  
Author(s):  
D. Rondelaud ◽  
M. Belfaiza ◽  
P. Vignoles ◽  
M. Moncef ◽  
G. Dreyfuss
Keyword(s):  
First Generation ◽  
Second Generation ◽  
Fasciola Hepatica ◽  
Abnormal Development ◽  
Third Generation ◽  
Biotic Factors ◽  
Snail Infection ◽  
Developmental Patterns ◽  
The Third

AbstractAn update on the redial generations ofFasciola hepaticawas carried out to highlight the different developmental patterns of rediae, the effects of some factors on these generations, and the consequences of such developmental patterns on cercarial productivity. The development of generations is dependent on the behaviour of the first mother redia of the first generation. If this redia remains alive throughout snail infection, it produces most second-generation rediae. In contrast, if it dies during the first weeks, daughter redia formation is ensured by a substitute redia (the second mother redia of the first generation, or the first redia of the second generation). Environmental and biotic factors do not modify the succession of redial generations, but most act by limiting the numbers of rediae, either in all generations, or in the second and/or third generations. An abnormal development of rediae reduces the number of cercariae and most are formed by the second cohort of the first generation. By contrast, most cercariae are produced by the first cohort of the second generation when redial development is normal. The mother rediae described by previous authors might correspond to the first generation and the second cohort of the second generation, while daughter rediae would be the second cohort of the second generation and the first cohort of the third generation. Under certain circumstances, daughter redia formation is ensured by the first two mother rediae or all first-generation rediae, thus demonstrating that the first mother redia is not the only larva to ensure daughter redia formation.

Effects of grass fallow treatments in restoring fertility of Buganda clay loam in South Uganda

1967 ◽  
Vol 68 (3) ◽  
pp. 391-403 ◽  
Author(s):  
D. Stephens
Keyword(s):  
Crop Yields ◽  
Soil Nutrient ◽  
Elephant Grass ◽  
Green Manures ◽  
Department Of Agriculture ◽  
Apparent Lack ◽  
Nutrient Contents ◽  
Top Soil ◽  
Crumb Structure ◽  
Soil Nutrient Contents

Between 1924 and 1934 Uganda, in common with many other African territories, tested arable rotations incorporating legumo green manures to maintain soil fertility (Martin, 1944; Uganda Dept., 1931–32) and it was concluded that the green manures failed to maintain fertility and were not worth the trouble involved. The Uganda Department of Agriculture accordingly changed its official rotations to modified forms of the indigenous shifting cultivation, namely 3 years of elephant grass rest alternating with 3 years of cropping. This same failure of green manures, combined with the apparent lack of correlation between crop yields and soil nutrient contents and the obvious deterioration of soil structure under crops, led Martin (1944) to the view that it was the physical not chemical condition of the soil which was important. Using his wet sieving technique he showed that, provided soils contained enough clay, all grass increased the water-stable crumbs over ½ mm diameter in the top soil and that 3 years under elephant grass was about optimal for restoring crumb structure.

scholarly journals Proximate and Mineral Composition of Nsala Bakala (Dracaena camerooniana Baker) Leaves, Stems and Roots from Nzenze Forest in Uíge Province, Angola

2021 ◽  
Vol 2 (4) ◽  
pp. 11-19
Author(s):  
Monizi Mawunu ◽  
Thea Lautenschläger ◽  
Koto-te-Nyiwa Ngbolua ◽  
Lukoki Luyeye ◽  
Luyindula Ndiku
Keyword(s):  
Biological Properties ◽  
Mineral Elements ◽  
Healthy Plant ◽  
Nutritional Factors ◽  
Nutrient Contents ◽  
Nutritional Analysis ◽  
The One ◽  
Different Levels ◽  
Proximate And Mineral Composition ◽  
Local Farmers

The aim of the present work was to perform nutritional analysis of Dracaena camerooniana Baker. Nutrient determination was carried out according to standard methods. The nutritional profile of the leaves, roots and stems of D. camerooniana showed that these organs are rich in fibre (14.20-53.65%), proteins (4.47-18.58%), lipids (1.53-5.42%) carbohydrates (23.67-70.94%), ash (2.17-15.59%) and mineral elements, namely, K (535.07-1690.00 mg/100 g), Ca (315.87-1459.97 mg/100 g), Mg (95.41-498.83 mg/100 g), P (76.72-149.56 mg/100 g), Na (105.83-113.60 mg/100 g), Se (75.87-128.51 mg/100 g), Fe (40.88-228.30 mg/100 g), Mn (7.41-11.39 mg/100 g), Zn (2.94-5.83 g/100 g), Cu (2.30-2.80 mg/100 g), and Co (0.65-2.80 mg/100 g) The different levels of nutrient contents observed in the analyzed organs of D. camerooniana would be attributed to the accumulative capacities of the plant organs. It is therefore recommended (desirable) that further studies be conducted to determine the content of anti-nutritional factors in this plant on the one hand and to evaluate its pharmaco-biological properties on the other. Domestication of the plant should be done to ensure its conservation with the support of local farmers. Thus, the use of biotechnology would allow the availability of healthy plant material for both present and future generations.

scholarly journals Effect of Some Nutritional Factors on The Growth and Yield of Apple cv. Ibrahimi

2021 ◽  
Vol 910 (1) ◽  
pp. 012117
Author(s):  
Sabren Hamed Fayadh ◽  
Ali Ammar Ismaeil
Keyword(s):  
Zinc Sulfate ◽  
Growth Traits ◽  
Potassium Sulfate ◽  
Growth And Yield ◽  
Average Weight ◽  
Total Sugars ◽  
Nutritional Factors ◽  
The Third ◽  
Total Chlorophyll Content ◽  
Planting Season

Abstract The field experiment was carried out during the planting season of 2020 in one of the private sector orchards in the Saqlawiya sub-district of Fallujah district to study the effect of foliar spraying with zinc, boron and potassium on some vegetative growth traits and the yield of apples of CV. Ibrahimi, the first factor is represented by spraying with boric acid H3BO3 at a Concentrations of (0, 1) g. L-1, mentioned as B0, B1, and the second factor consisted of spraying with zinc sulfate ZnSO4 at a concentrations of( 0, 3) g. L-1 mentioned as Z0, Z1 and the third factor is spraying with potassium sulfate K2SO4 at concentrations (0, 2.5, 5) g. L-1 mentioned asK0-K1, K2 respectively. The results showed that the effect of spraying with the study factors led to a significant increase in most of the studied traits represented by (the area of one leaf, the total chlorophyll content of the leaves, the percentage of carbohydrates in the branches, the percentage of fallen fruits, the yield of one tree, the average weight of the fruit, the percentage of total sugars in the fruits, and the content of the fruits of vitamin C) reached ( 27.81 cm2, 82.67mg100g-1, 14.37%, 30.74%, 27.98kg.tree-1, 45.13g, 8.57%, 4.87 mg100g-1) sequentially.

scholarly journals Effects of seeds treated with cobalt nanoparticles on germination, growth, yield and quality of soybean cultivar DT12

2019 ◽  
Vol 41 (2) ◽  
Author(s):  
Le Thi Thu Hien ◽  
Tran Thi Truong
Keyword(s):  
Metallic Nanoparticles ◽  
Crop Yields ◽  
Germination Rate ◽  
Growth Yield ◽  
Crop Productivity ◽  
Cobalt Nanoparticles ◽  
Soybean Cultivar ◽  
Growth Speed ◽  
Nutrient Contents ◽  
Protein Components

Seed treatment using metallic nanoparticles to stimulate germination and improve crop yields has been published and widely applied in agriculture production. To assess the safety of such methods on plants, the effectiveness and safety of the treatment of soybean Glycine max L. DT12 seeds with cobalt nanoparticles (nCo) before sowing were investigated. Seeds of soybean cultivar DT12 were treated with nCo at two different concentrations (0.165 and 1.65 mg/kg seed) before sowing. Germination rate, growth speed, soybean yield and bean nutrient components were examined throughout a season. Results implied that at a concentration of 0.165 mg/kg, nCo significantly increased germination rates, plant heights, total pods per plant, number of pods having 3 seeds, and crop productivity compared to both the control and seeds treated with a highter concentration of 16.5 mg per kg of seed. However, no significant differences were found between treatments in terms of growth level and seed nutrient contents, including moisture, ash content, mineral (K, Mg and Fe) and crude protein components. In seeds treated with higher concentration, the Ca content was dramatically lower than that of the control and seeds treated with a low concentration, but bean quality was not affected. This study contributes to the effective and sustainable application of nanomaterials in Vietnamese agriculture. 

scholarly journals Further Evidence on the Need of Magnesium for Pineapple in Oxisols

1969 ◽  
Vol 53 (4) ◽  
pp. 357-368
Author(s):  
E. Hernández-Medina
Keyword(s):  
Puerto Rico ◽  
Magnesium Sulfate ◽  
Crop Yields ◽  
Magnesium Content ◽  
Lateritic Soil ◽  
Yield Data ◽  
Nutrient Contents ◽  
Foliar Sprays ◽  
High Nutrient ◽  
Sulfate Application

Two pineapple experiments were established in Bayamón sandy clay, the most extensively used acid lateritic soil for pineapple growing in Puerto Rico. The experiments were conducted to study the effect of different amounts of magnesium sulfate applied to the soil on yields of pineapples. The influence of magnesium chelate and of foliar sprays on pineapple yields was also studied. The results obtained are briefly summarized as follows: 1. Pineapple plants supplied with magnesium were more vigorous and greener in color than similar plants not receiving this nutrient. 2. Significant heavier fruit yields were obtained from pineapple plants receiving magnesium sulfate at the various rates used as a soil application than from the pineapple plants not receiving this nutrient. 3. Magnesium chelate and magnesium sulfate foliar sprays were also responsible for significantly increasing fruit yields per acre. 4. Highest fruit yields were associated with high nutrient contents of magnesium in the leaves. 5. Highly significant correlations were found between pineapple relative yields and leaf magnesium content at two crop ages. 6. Results indicate that magnesium content of 5- and 9-month old pineapple plants can be used to predict relative crop yields. 7. Capo's new fertilizer-yield equation was used to describe the relation between the application of magnesium sulfate and the yields of pineapples. The equation fitted closely such fertilizer-yield data. 8. The optimum economic magnesium sulfate application for the two pineapple experiments discussed was determined.

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