scholarly journals Controlled release fertilizer used for the growth of Campomanesia aurea seedlings

2020 ◽  
Vol 26 (1) ◽  
pp. 35-44
Author(s):  
Aquélis Armiliato Emer ◽  
Mara Cíntia Winhelmann ◽  
Marília Tedesco ◽  
Claudimar Sidnei Fior ◽  
Gilmar Schafer
Keyword(s):  
Controlled Release ◽  
Leaf Area ◽  
Dry Matter ◽  
Index Number ◽  
Base Diameter ◽  
Controlled Release Fertilizer ◽  
Pampa Biome ◽  
Number Of Stems ◽  
Leaf Accumulation ◽  
Main Growth

Abstract Campomanesia aurea is a sub-shrub species native to the Pampa Biome, popularly known as “guabirobinha-do-campo”. It has an ornamental potential for use in pots or gardens due to its small size, irregular shape, intense flowering and aroma. One of the main factors for production is an adequate use of fertilizers and balanced fertilizations. The objective was to evaluate the growth of seedlings and nutrient leaf accumulation of C. aurea submitted to doses of controlled release fertilizer (CRF). C. aurea seedlings were transplanted to containers containing composted pinus bark and CRF doses of 0, 2.5, 5.0, 7.5 and 10.0 g L−1. Height, chlorophyll index, number of stems, base diameter, leaf area, Dickson Quality Index, shoot dry matter, root dry matter and nutrient leaf accumulation were evaluated. For height, base diameter and number of stems, the point of maximum response was at the concentration 6.8, 6.6 and 6.9 g L−1 CRF, respectively. For shoot dry matter, leaf area and chlorophyll, we verified increase up to the concentration 8.1, 7.8 and 8.0 g L−1, respectively. There was a positive quadratic behavior for most nutrients, with the exception of Cu and Mn, which linearly increased with the increase of fertilizer dose. The application of CRF on C. aurea seedlings between 7 and 8 g L−1 substrate promoted an increase on the main growth characteristics of ornamental importance and provides superior results on nutrient leaf content.

scholarly journals CONTROLLED-RELEASE FERTILIZER IN THE GROWTH OF Dalbergia nigra SEEDLINGS

FLORESTA ◽  
2020 ◽  
Vol 50 (2) ◽  
pp. 1203
Author(s):  
Aline Ramalho dos Santos ◽  
Elzimar De Oliveira Gonçalves ◽  
Elbya Leão Gibson ◽  
Emanuel França Araújo ◽  
Marcos Vinicius Winckler Caldeira
Keyword(s):  
Controlled Release ◽  
Experimental Design ◽  
Nutritional Status ◽  
Forest Restoration ◽  
Dry Matter ◽  
Controlled Release Fertilizer ◽  
Seed Sources ◽  
Matter Production ◽  
Growth And Nutrition ◽  
Dalbergia Nigra

For the realization of forest restoration projects, it is essential to produce native seedlings in quantity, also necessary that they present greater vegetative vigor and good nutritional status. In this context, the objective of this work was to analyze the growth and nutrition of phosphorus of Dalbergia nigra seedlings from two sources cultivated with doses of controlled-release fertilizer (CRF). The experimental design was in randomized blocks, arranged in a factorial scheme 2 x 4, referring to lots of two seed sources of D. nigra (Viçosa, MG and Linhares, ES) and four doses of CRF (0, 2, 4 and 8 kg m-3), with four replications and 126 seedlings per plot. At 60, 90 and 120 days after sowing, the seedlings were collected to measure the variables related to growth and nutrition. D. nigra seedlings from Linhares (ES) show better growth and dry matter production. It is recommended to dose 7.46 kg m-3 of controlled-release fertilizer for seedlings from Linhares (ES) and the dose 5.99 kg m-3 for those coming from Viçosa (MG), aiming to maximize the growth of production of seedlings of D. nigra. Increasing doses of controlled-release fertilizer allow greater accumulation of P in shoot shoots of D. nigra.

scholarly journals Doses of controlled-release fertilizer for production of rubber tree rootstocks

CERNE ◽  
2012 ◽  
Vol 18 (2) ◽  
pp. 239-245 ◽  
Author(s):  
Antonio Nilson Zamunér Filho ◽  
Nelson Venturin ◽  
Ailton Vitor Pereira ◽  
Elainy Botelho Carvalho Pereira ◽  
Renato Luis Grisi Macedo
Keyword(s):  
Experimental Study ◽  
Controlled Release ◽  
Dry Matter ◽  
Block Design ◽  
Rubber Tree ◽  
Controlled Release Fertilizer ◽  
Randomized Block Design ◽  
Vigorous Plant ◽  
Plastic Containers ◽  
Root Collar

This experimental study aimed to evaluate the effects of doses of controlled-release fertilizer (ALL) on the development of rubber tree rootstocks. The fertilizer used was Osmocote®, scheduled to be released for 8-9 months and with the following composition: N (15%), P2O5 (9%), K2O (12%), Mg (1%), S (2.3%), B (0.02%), Cu (0.05%), Fe (1%), Mn (0.06%), Mo (0.02%) and Zn (0.05%). A randomized block design was used, with four treatments and eight replicates of 20 plants per plot. The controlled-release fertilizer was added to Rendimax Floreira® substrate at doses of 0, 3, 6 and 9 g per liter, and rootstocks were produced in plastic containers with a capacity of two liters of substrate. Three seeds of clone GT 1 were scattered in each container and thinning was performed on day 60, leaving the most vigorous plant only. After the fourth leaf shot from each rootstock, the containers of each treatment were topped, due to compaction, with 300 mL of the relevant fertilizer and substrate mixture. The rootstocks were evaluated at eight months of age as to height, stem diameter (DC) 5 cm above root collar, total dry matter, shoot and root dry matter, leaf nutrient levels and percentage of plants suitable for grafting (DC>1.0 cm). Results revealed that adequate development and nutrition of rootstocks was achieved by using 6 g of controlled-release fertilizer per liter of substrate.

scholarly journals Responses of basil cultivars to irrigation water salinity

2017 ◽  
Vol 21 (1) ◽  
pp. 44-49 ◽  
Author(s):  
Sandra S. S. Maia ◽  
Ricardo C. P. da Silva ◽  
Francisco de A. de Oliveira ◽  
Otaciana M. dos P. da Silva ◽  
Ana C. da Silva ◽  
...  
Keyword(s):  
Experimental Design ◽  
Leaf Area ◽  
Irrigation Water ◽  
Dry Matter ◽  
Water Salinity ◽  
Irrigation Water Salinity ◽  
Stems And Leaves ◽  
Four Levels ◽  
Number Of Stems ◽  
Semi Arid

ABSTRACT The objective of this work was to verify the response of basil cultivars to the salinity of irrigation water during the period from January 15 to March 20, 2013, in a greenhouse, at the Federal Rural University of the Semi-Arid, Mossoró, RN, Brazil. The experimental design was completely randomized, with treatments arranged in 2 x 4 factorial scheme, constituted of two cultivars of basil (‘Verde’ and ‘Roxo’) and four levels of irrigation water salinity (0.5; 2.0; 3.5 and 5.0 dS m-1), with four replicates. The plants were collected at 65 days after transplanting and the following variables were evaluated: stem diameter; plant height; number of stems and leaves; leaf area; dry matter of leaves, stems, roots, and total dry matter. The increase in salinity was detrimental to all variables evaluated in both cultivars, but the cultivar ‘Roxo’ proved to be more tolerant than the cultivar ‘Verde’. Both cultivars are tolerant to irrigation water salinity of up to 1.5 dS m-1.

scholarly journals Container volume and controlled-release fertilizer influence the seedling quality of Agonandra brasiliensis

2020 ◽  
Vol 50 ◽  
Author(s):  
Oscar José Smiderle ◽  
Raiovane Araújo Montenegro ◽  
Aline das Graças Souza ◽  
Edvan Alves Chagas ◽  
Thiago Jardelino Dias
Keyword(s):  
Controlled Release ◽  
Dry Matter ◽  
Morphological Characteristics ◽  
Seedling Quality ◽  
Shoot Length ◽  
Stem Diameter ◽  
Controlled Release Fertilizer ◽  
Brazilian Savannah ◽  
Polyethylene Bags

ABSTRACT Agonandra brasiliensis is a tree from tropical forests, with a wide occurrence in the Brazilian Savannah region. Despite its potential as wood and for reforestarion, efficient protocols for its seedling production are still lacking. This study aimed to assess morphological characteristics for the seedling quality of A. brasiliensis, under nursery conditions, as a function of container volume and controlled-release fertilizer dose. The experiment was carried out in a 2 x 5 factorial scheme, testing two container volumes (1.8 L and 2.2 L) and five doses (0 g L-1, 1 g L-1, 2 g L-1, 4 g L-1 and 8 g L-1) of the encapsulated fertilizer Forth Cote™ (formulation NPK 15-09-12). The plots consisted of five homogeneous seedlings transplanted in polyethylene bags (15 cm x 35 cm) with washed medium sand substrate. The following characteristics were measured: shoot length; stem diameter; increases in length and diameter; total dry matter; shoot and root dry matters and the ratio between them. The Dickson Quality Index was also obtained. The seedling quality for morphological traits, such as shoot length, stem diameter and total dry matter, was especially favoured by treatments combining the controlled-release fertilizer at a dose around 5.0 g L-1 and container volume of 2.2 L.

scholarly journals Some genetic parameter for maize under different planting dates and environments

2021 ◽  
Vol 8 (3) ◽  
Author(s):  
Kamal Ahmed Kazem ◽  
Wajeeha Abed Hassan
Keyword(s):  
Leaf Area Index ◽  
Leaf Area ◽  
Coefficient Of Variation ◽  
Dry Matter ◽  
Crop Growth ◽  
Index Number ◽  
Area Index ◽  
Plant Weight ◽  
Physiological Maturity ◽  
Sowing Dates

"To evaluate the performance of introduced varieties of maize under different sowing dates and locations, in addition to local variety, a field experiment was carried out in two locations;. The study compared five varieties of maize introduced from America, with a local synthetic variety (Ibba 5018) and tested it in two locations at three sowing dates (1, 15 July and 1 August). The Randomized Complete Block Design RCBD was used with four replications, with spilt plot arrangements, the main plots included three sowing dates, the secondary plots included, the varieties. The traits of the days number to tassling and days to silking, plant height, ear height, number of leaves, leaves area, leaf area index, number of ears plant-1 , ear length, the number of rows ear-1, number of grains row-1 , number of grains of the plant, weight of 100 grains, total dry matter weight, the number of days to Physiological maturity, crop growth rate, individual plant yield and yield (tons h-1 ) were studied. The results showed that the values of the standard error (SE) in the two trial locations were low for the studied traits and within the acceptable limit except leaf area which was high in the first and second dates for the Baghdad location and for the three dates of the Diyala incident, as well as the values of the coefficient of variation (CV) were also low and within statistically acceptable limits and for all the traits studied in the three dates and for the two locations. Genetic variations were higher than the = environmental variation for most of the studied traits and the phenotypic coefficient of variation is close to the coefficient of genetic variation for the two locations and the three sowing dates, and this indicates that the traits are genetically governed. The value of heritability in a broad sense was higher than 90% at Baghdad location for first of July for the traits leaves area and its index, weight of the dry matter, number of days to physiological maturity (96.6, 97.4, 93.4 and 94.4%, respectively) and for 15 July for the traits. Leaf area and its index, and number of days to physiological maturity (94.7, 94.7 and 93.4%), and for I Aug for 9 traits; number of days silking, the leaf area and leaf area index, number of ears dry matter, days to maturity, rate of crop growth and yield the plant and unit area ((95.7, 99.4, 99.4, 94, 98.4, 95.5, 98.6, 93.4, 93.5%) Sequentially. As for Diyala, the traits of leaf area, leaf area index, number of days to physiological maturity, yield of plants, and area unit in the three dates were superior to the highest heritability (92.3, 92.3, 98.7, 73.6, 73.6%), (90.2, 90.2, 98.8, 82.9, 82 .9%), (90.9, 90.9, 86.4, 80.7, 80.7% respectively)."

scholarly journals Silvicultural Potential of Handroanthus heptaphyllus Under Doses of Controlled Release Fertilizer and Container Volume, in Nursery and in the Field

2018 ◽  
Vol 10 (11) ◽  
pp. 389
Author(s):  
Jessé C. Mezzomo ◽  
Maristela M. Araujo ◽  
Felipe Turchetto ◽  
Daniele G. Rorato ◽  
Adriana M. Griebeler ◽  
...  
Keyword(s):  
Controlled Release ◽  
Leaf Area ◽  
Dry Weight ◽  
Controlled Release Fertilizer ◽  
Shoot Dry Weight ◽  
Nutritional Conditions ◽  
Polyethylene Bags ◽  
Chlorophyll Index ◽  
Fluorescence Of Chlorophyll A ◽  
Total Dry Weight

The present study aimed to characterize the growth of Handroanthus heptaphyllus seedlings in a nursery, planted under different container volumes and doses of controlled release fertilizer (CRF), and to verify whether the responses obtained in the nursery are confirmed in the field. For the production of seedlings in the nursery, three volumes of container (180 and 280 cm3 polypropylene tubes and 500 cm3 polyethylene bags) and four CRF doses (0, 4, 8, and 12 g L-1 of substrate) were used. At 180 d after emergence, height (H), stem diameter (SD), H:SD ratio, shoot dry weight, root dry weight, total dry weight, Dickson Quality Index, leaf area, root length, and fluorescence of chlorophyll a were evaluated. The same treatments were evaluated again in the field 540 d after planting, and the survival, increase in H and SD, as well as shoot dry weight, leaf area, chlorophyll fluorescence, and chlorophyll index (a, b and total) were measured. In the nursery, seedlings of H. heptaphyllus responded positively to the volume of the container, as well as the base fertilization using CRF. However, when planted in the field, the plants that received the best nutritional conditions in the nursery showed good performance and was favored in the field. Thus, in the production of quality seedlings, the use of containers of the type polypropylene tubes with 180 cm3, and basic fertilization with 12 g L-1 of CRF conditions that enable growth of H. heptaphyllus in the field are recommended.

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