scholarly journals Growth of melon cultivated in coconut fiber under different concentrations of nutrient solution

2018 ◽  
Vol 9 (3) ◽  
pp. 381-392
Author(s):  
Christiano Rebouças Cosme ◽  
Nildo Da Silva Dias ◽  
Karen Mariany Pereira Silva ◽  
John Lenon Vasconcelos Fonteles ◽  
Marcelo Tavares Gurgel ◽  
...  
Keyword(s):  
Growth Rate ◽  
Nutrient Solution ◽  
Cucumis Melo ◽  
Aerial Part ◽  
Coconut Fiber ◽  
Relative Growth ◽  
Standard Solution ◽  
Cucumis Melo L ◽  
Different Levels ◽  
Nutrient Solutions

To evaluate the effects of applying different concentrations of the nutrient solution macronutrients in growth of melon cultivated in coconut fiber it was conducted this experiment uses the ‘Galia’ melon (Cucumis melo L., hybrid Babilonia RZ F1). The experimental design was a randomized blocks utilizing five treatments, which corresponded to different concentrations of macronutrients in nutritive solutions (corresponding to different levels of nutrient solution macronutrients) based on the standard solution for the melon proposed by Furlani: 100 (control), 75, 50, 25, and 12.5%, applied in five replications. The concentration of 50% provided higher production of dry matter of the aerial part and leaf area. The absolute aerial part growth rate showed different tendencies for levels being that concentration of 50% produced the best results. The relative growth rate of the aerial part and assimilation rate of the aerial part decrease with time for all concentrations of the nutrient solutions tested.

scholarly journals Emergence and vegetative development of melon in function of the soil salinity

2019 ◽  
Vol 13 ((03) 2019) ◽  
pp. 458-464 ◽  
Author(s):  
Daniel Teixeira Pinheiro ◽  
Fabio Delazari ◽  
Carlos Nick ◽  
Edson Marcio Mattiello ◽  
Denise Cunha Fernandes dos Santos Dias
Keyword(s):  
Soil Salinity ◽  
Cucumis Melo ◽  
Arid Regions ◽  
Seedling Emergence ◽  
Saline Stress ◽  
Exchangeable Sodium ◽  
Vegetative Development ◽  
Percentage Points ◽  
Cucumis Melo L ◽  
Different Levels

Soil salinity is one of the main factors limiting the development and global agricultural productivity. Melon (Cucumis melo L.) is mainly produced in arid and semi-arid regions around the world, favoring the accumulation of soluble salts in the soil. Therefore, this study aimed to evaluate the emergence and vegetative development of melon genotype under different levels of soil salinity. The assessments were performed based on the exchangeable sodium percentage (ESP) at 0, 20, 25, 30 and 35%. The emergence was affected around 30 percentage points, by comparing the control and the highest dose (35%). The emergence speed and the emergence speed index parameters were also affected in a similar way, as well as the length and dry matter of the shoot. The growth of the plants was also affected by the saline stress, being superior in the control (0%) in relation to the treatments with NaCl. The leaf area increased between weeks 4 and 7 after the planting and was slightly superior in the control in relation to the plants submitted to saline stress (20, 25, 30 and 35% of exchangeable sodium). The melon is more sensible to the saline stress in the seedling emergence than in the vegetative development over time. The development of melon seedlings is mainly affected in exchangeable sodium values superior to 20%. The analyzed hybrid is sensible to the saline stress even in 20% of exchangeable sodium.

scholarly journals Growth Analysis of ‘Plumosa Compacta’ Juniper and ‘Coral Beauty’ Cotoneaster Subjected to Different Nitrogen Fertilizer Regimes

1990 ◽  
Vol 8 (4) ◽  
pp. 192-196
Author(s):  
Peter R. Hicklenton
Keyword(s):  
Growth Rate ◽  
Weight Gain ◽  
Growth Analysis ◽  
Dry Weight ◽  
Negative Influence ◽  
The Other ◽  
N Application ◽  
Relative Growth ◽  
Fertilizer Regimes ◽  
Nutrient Solutions

Abstract ‘Plumosa Compacta’ juniper (Juniperus horizontalis Moench.) and ‘Coral Beauty’ cotoneaster (Cotoneaster dammeri C. K. Schneid.) were container grown in a bark:peat-sand medium (2:1:1 by vol.). Plants received either 70, 140, 280 or 420 mg (0.003, 0.005, 0.010 or 0.015 oz) N per week from nutrient solutions. Growth was assessed on plants harvested from each treatment regime on May 22 and then at monthly intervals until September 16. Juniper plants grown with 140 mg (0.005 oz) N per week were larger at the end of the season than those in the other treatments. In cotoneaster, growth increased as weekly N application increased from 70 to 420 mg (0.03 to 0.015 oz) N per week. Path analysis was used to quantify the effect of plant relative growth rate (RGR) during each month on RGR in subsequent months and on total seasonal relative dry weight gain (TRWG). RGR during each month significantly influenced TRWG, with the periods from June 21 to July 20, and from July 21 to August 18 exerting the greatest influence in cotoneaster. In juniper, the influence of RGR in each month on TRWG was equal. For both cotoneaster and juniper, increasing RGR during one month tended to have a negative influence on RGR during subsequent months.

scholarly journals Filamentous fungi isolated from the rhizosphere of melon plants (Cucumis melo L. cv. Gold Mine) cultivated in soil with organic amendments

2010 ◽  
Vol 24 (1) ◽  
pp. 292-298 ◽  
Author(s):  
Flavia Paiva Coutinho ◽  
Maria Auxiliadora de Queiroz Cavalcanti ◽  
Adriana Mayumi Yano-Melo
Keyword(s):  
Filamentous Fungi ◽  
Cucumis Melo ◽  
Ricinus Communis ◽  
Organic Amendments ◽  
Pennisetum Purpureum ◽  
Gold Mine ◽  
Coconut Fiber ◽  
Fungal Isolation ◽  
Goat Manure ◽  
Cucumis Melo L

Rhizosphere soil samples were collected in a semiarid area, in the region of the São Francisco River valley, Petrolina, Pernambuco state, Brazil, to study the diversity of filamentous fungi in a soil cultivated with melon (Cucumis melo L. cv. Gold Mine) and receiving different organic amendments: Treatment 1 (control, without organic compost); T2 (77% coconut fiber, 20% goat manure and 3% K2SO4); T3 (10% Ricinus communis leaves and stems, 50% Pennisetum purpureum leaves and 40% goat manure); T4 (77% coconut fiber, 20% goat manure and 3% termophosphate); T5 (47% Pennisetum purpureum leaves, 50% goat manure and 3% K2SO4); and T6 (57% Pennisetum purpureum leaves, 40% goat manure and 3% termophosphate). Fungal isolation was carried out by the serial dilution technique to 1:1000. The Sorensen index of similarity, frequency and distribution of the fungi were evaluated. Seventy-eight species of filamentous fungi were isolated and identified, plus several Basidiomycota (04) and Mycelia sterilia (02). The predominant genera were Aspergillus and Penicillium, with 15 and 13 species, respectively. A greater number of species was found in the sowing period (49), and in relation to the organic fertilization, treatment 6 provided the greatest species diversity (43 species). Most of the species are saprobes and only a few are considered to be potential pathogens on melon plants, such as Fusarium oxysporum, F. solani and Myrothecium roridum.

scholarly journals Effect of Saline Stress and Calcium Nitrate on Lettuce Grown on Coconut Fiber

2018 ◽  
Vol 10 (11) ◽  
pp. 259
Author(s):  
Francisco de A. de Oliveira ◽  
Isabelly C. da S. Marques ◽  
Ana Jacqueline de Oliveira Targino ◽  
Carla J. X. Cordeiro ◽  
Mychelle K. T. de Oliveira ◽  
...  
Keyword(s):  
Leaf Area ◽  
Nutrient Solution ◽  
Block Design ◽  
Calcium Nitrate ◽  
Dry Weight ◽  
Saline Stress ◽  
Coconut Fiber ◽  
Randomized Block Design ◽  
Leaf Succulence ◽  
Nutrient Solutions

This study aimed to evaluate the use of saline solutions enriched with calcium nitrate in the production of lettuce grown in coconut fiber. The experiment was carried out from July to August 2017 in a greenhouse, at the Federal Rural University of the Semi-Arid Region (UFERSA), Mossoró-RN, Brazil. A randomized block design was used, in 2 × 5 factorial scheme, with three replicates. Treatments resulted from the combination of two lettuce cultivars [Elba (Curly) and Irene (Crisphead)] and five nutrient solutions (S1- standard nutrient solution; S2-S1 + NaCl (28.48 mmol L-1); S3-S2 + Ca(NO3)2 (6.89 mmol L-1); S4-S2 + Ca(NO3)2 (9.15 mmol L-1); S5-S2 + Ca(NO3)2 (11.43 mmol L-1)]. Plants were harvest 30 days after transplantation and the following variables were analyzed: head diameter, stem diameter, number of leaves, fresh weight, dry weight, leaf area, specific leaf area and leaf succulence. The cv. Irene (Crisphead) is more tolerant to nutrient solution salinity compared with the cv. Elba (Curly). Nutrient solutions enriched with 50 and 100% of Ca(NO3)2 promoted better performance of the cultivars Elba and Irene, respectively, fertigated with saline nutrient solution.

scholarly journals Initial growth of Brachiaria subquadripara (Trin.) Hitchc. plants under different nutritional conditions

2015 ◽  
Vol 19 (6) ◽  
pp. 560-566
Author(s):  
Vanessa D. Domingos ◽  
Dagoberto Martins ◽  
Neumarcio V. Costa ◽  
Andreia C. P. R. da Costa ◽  
Sidnei R. de Marchi
Keyword(s):  
Growth Rate ◽  
Relative Growth Rate ◽  
Nutrient Solution ◽  
Initial Growth ◽  
Assimilation Rate ◽  
Relative Growth ◽  
Emergent Plants ◽  
Nutritional Conditions ◽  
Base Solution ◽  
Net Assimilation

ABSTRACT The objective of this study was to evaluate the initial growth of emergent plants of Brachiaria subquadripara under different conditions of availability levels of the nutrients nitrogen (N), phosphorus (P), and potassium (K) provided to the plants via nutrient solution in a greenhouse. The treatments consisted of five concentrations of N (0, 42.0, 84.0, 126.0, and 168.0 mg L-1), five concentrations of P (0, 6.2, 12.4, 18.6, and 24.8 mg L-1) and five concentrations of K (0, 46.8, 93.6, 140.4, and 187.2 mg L-1) which were adapted from a base solution. The results showed that the initial growth of plants was slow up to 21 days after transplantation (DAT) and it increased in accordance with increments in N, P, and K concentrations in the nutrient solution up to the end of the study (35 DAT). The Relative Growth Rate and the Net Assimilation Rate of the B. subquadripara plants were larger when the N, P, and K concentrations were of 84.0, 18.6, and 46.8 mg L-1, respectively. These results suggest that this species can develop in environments considered hypereutrophic.

scholarly journals Growth and nutrient accumulation in the aerial part of red Pitaya (Hylocereus sp.)

2019 ◽  
Vol 41 (5) ◽  
Author(s):  
Denise de Castro Lima ◽  
Nouglas Veloso Barbosa Mendes ◽  
Márcio Cleber de Medeiros Corrêa ◽  
Carlos Alberto Kenji Taniguchi ◽  
Ronialison Fernandes Queiroz ◽  
...  
Keyword(s):  
Growth Rate ◽  
Aerial Part ◽  
Dry Matter ◽  
Essential Elements ◽  
Production Costs ◽  
Nutritional Requirement ◽  
Nutrient Accumulation ◽  
Relative Growth ◽  
Abstract Knowledge ◽  
Sampling Times

Abstract Knowledge on the amounts of nutrients accumulated by pitaya in its different development stages allows defining the periods in which the essential elements are most required, thus contributing to the elaboration of rational fertilization programs for the crop, reducing production costs. This study aimed to evaluate the growth and nutritional requirement of red pitaya, estimating the accumulation of macro and micronutrients by the plants and determining the periods in which the greatest accumulations occur, as well as the relative growth rate and the relative nutrient absorption rate. Pitaya seedlings were planted in pots containing Argissolo Vermelho-Amarelo Eutrófico (Ultisol) and grown in the open air. The experimental design was randomized blocks, with four replicates and seven sampling times: 0, 60, 120, 180, 240, 300 and 360 DAP (days after planting). At each sampling time, length of cladodes, dry matter of the aerial part and nutrient accumulation in the aerial part were evaluated. Red pitaya plants showed a low growth rate until 60 days and, from this period, its growth increased significantly. Nutrient accumulation occurred in the following descending order: K > Ca > N > Mg = P > S > Na element > Zn > Mn > Fe > B > Cu. K and Zn were, respectively, the most exported macro and micronutrient by pitaya fruits.

scholarly journals The Contribution by Leaves of Different Age to New Growth of Subterranean Clover Plants Following the Removal of a Sulphur Stress I. Origin and Distribution of Dry Matter

1972 ◽  
Vol 25 (6) ◽  
pp. 1147 ◽  
Author(s):  
D Bouma ◽  
EAN Greenwood ◽  
EJ Dowling
Keyword(s):  
Growth Rate ◽  
Leaf Area ◽  
Relative Growth Rate ◽  
Dry Matter ◽  
Subterranean Clover ◽  
Area Ratio ◽  
Assimilation Rate ◽  
Relative Growth ◽  
Net Assimilation ◽  
Nutrient Solutions

During the first 3 days after transfer of moderately sulphur-deficient plants (S1) to full nutrient solutions, the relative growth rate (Rw) was considerably lower than that of plants raised at higher sulphur levels (S2 and Sa). This was reflected in a lower leaf area ratio of the S1 plants, and particularly in a reduction of nearly 50% in the net assimilation rate (EA). Net losses in dry matter from younger emerged leaves and petioles accounted for 25% of the dry matter in new leaves and petioles of S1 plants produced during this period.

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