scholarly journals Vegetative development of vine rootstock cultivars in brazilian cerrado conditions

2020 ◽  
Vol 16 (4) ◽  
pp. 121-128
Author(s):  
Luiz Fernandes Cardoso Campos ◽  
Eduardo Pradi Vendruscolo ◽  
Sávio Rosa Correia ◽  
Camila Meira de Abreu Campos ◽  
Adriana Teramoto ◽  
...  
Keyword(s):  
Growth Rate ◽  
The State ◽  
Brazilian Cerrado ◽  
Vegetative Development ◽  
Branch Growth ◽  
Absolute Growth Rate ◽  
Absolute Growth ◽  
The Absolute ◽  
Double Factorial

In the State of Goiás, studies related to the vine's responses to the region's edaphoclimaticconditions are scarce. Therefore, the objective of this work was to evaluate the growth of three vine rootstock cultivars, IAC 572 'Jales', IAC313 'Tropical' and IAC766 'Campinas', in the region of Goiânia, GO, after drastic pruning for uniformity. To evaluate the growth of rootstocks, the experiment was carried out in random blocks, in a double factorial scheme (3x7), with five replications, each repetition formed by a plant. The first factor consisted of three rootstocks: IAC313 ‘Tropical’, IAC572 ‘Jales’ and IAC766 ‘Campinas’. The plants were evaluated after 45 days after a drastic uniformization pruning, totaling seven evaluations (45, 60, 75, 90, 105, 120, 135 days after pruning), this being the second factor. The diameter of the main branch at the height of grafting (80 cm) and length of the main branch were evaluated. With the data on the diameter and length of the main branch, the absolute growth rate in diameter and length was calculated.The IAC572 'Jales' rootstock cultivar has greater vigor for branch growth, being 69% and 47.3% longer in length, and 49.8% and 18.8% longer in diameter than the IACrootstock. IAC 313 'Tropical' 'and' IAC766 'Campinas', respectively. The IAC766 ‘Campinas’ rootstock cultivar, although it has low vigor in branch growth, presents satisfactory development.

scholarly journals Morphological features of oat (Avena Sativa L.) shoots formation in the southern part of Ukraine

2020 ◽  
pp. 74-80 ◽  
Author(s):  
A. A. Ilina
Keyword(s):  
Growth Rate ◽  
Air Temperature ◽  
Effective Temperature ◽  
Weather Conditions ◽  
Growth Patterns ◽  
Average Growth ◽  
Absolute Growth Rate ◽  
Temperature Sum ◽  
Absolute Growth ◽  
The Absolute

Oats is essential for agricultural production and processing industry due to the unique biochemical composition of its grain. Thus, it is very important to study the biological and morphometric features of oats. The length and area of the plant's organs can establish a degree of comfort of growing conditions and determine during which period of plant's life the external weather conditions changed. Phytomers are basic repetitive functional units of the oat shoot. This paper presents the description and parameters of development of oat shoot metamers, namely, the identification of growth patterns of terrestrial vegetative metamers of oat shoots and their parts. The experiments were conducted in 2013, 2014 and 2018. The weather conditions of the specified years varied greatly – 2013 and 2014 were the most favorable in terms of humidification and precipitation, while 2018 was a very dry one. The paper determines the absolute and relative growth rates of the oat shoot internode paper and the maximum growth rate of each metamer in the linear phase. According to our observations, the absolute growth rate of oats was negligible and increased from 0.01 to 0.5 mm/d when the air temperature varied from 15 °C to 20 °C. However, when the air temperature reached about 20 °C, the absolute growth rate increased from 0.5 mm/d to almost 2 mm/d. We also found the effective sum temperatures under which the beginning and the end of the growth of each internodes take place. Thus, the first internode starts to grow the effective temperature sum of up to 117 °C is with the accumulated while the panicle starts growing when the effective temperature sum of up to 668 °C is accumulated. The growth of both the seventh internode and the panicle stops at the same time when the effective temperature sum of up to 1173 °C is accumulated. The ontogeny of oat shoots has a regular sequence of growth and development of terrestrial vegetative shoot metamers and their parts. The average growth duration of oat stem internode duting the years of research constituted 9 days for the first internode, 30 days for the seventh internode and 26 days for the panicle .

scholarly journals MEAT BONE MEAL (MBM) AND POLTRY BY-PRODUCT (PBM) TEST ON GRANULE TOWARDS THE GROWTH AND SURVIVAL RATE OF EEL (Anguilla Bicolor) Stadia ELVER

2018 ◽  
Vol 1 (1) ◽  
pp. 17
Author(s):  
Triana Indri Astuti ◽  
Hany Handajani ◽  
Riza Rahman Hakim
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Bone Meal ◽  
Growth And Survival ◽  
Absolute Growth Rate ◽  
Randomized Design ◽  
Absolute Growth ◽  
Completely Randomized Design ◽  
The Absolute ◽  
Meat Bone Meal

This research was conducted at Hatchery Fishery Laboratory in University of Muhammadiyah Malang on February 15 - March 17, 2018. The purpose of this research was to identify the meat bone meal (MBM) and poltry by-product (PBM) test on granule and the best treatment to the growth and survival rate of Eel (Anguilla bicolor) stadia elver. The method used was experiemental by Completely Randomized Design (RAL) with 3 different treatments on granule composition, P1 (Commercial Granule), P2 (70% Commercial Granule  and 30% MBM), P3 (70% Commercial Granule and 30% PBM), and each treatment done repeatedly three times. Furthermore, the data were analyzed by ANAVA and continued with BNT test. The results of this study indicated that the meat bone meal (MBM) and poltry by-product (PBM) test on granule had a significant effect on the absolute growth rate, a very significant effect on DGR, and not significantly different on Eel. The absolute best growth rate was on P2 2.24 ± 0.71. The best DGR was on P1 (5.55 ± 0.33). Based on the research results, it was concluded that feeding the granule based on meat bone meal increased the growth and survival rate, and also could be the substitution granule for Eel ( Anguilla bicolor). Keywords: Anguilla bicolor, MBM, PBM, Growth

scholarly journals REKAYASA SALINITAS MEDIA PEMELIHARAAN SEBAGAI UPAYA DOMESTIKASI IKAN GIRU (Amphiprion ocellaris) YANG BERASAL DARI KEPULAUAN SIMEULUE

2016 ◽  
Vol 3 (1) ◽  
Author(s):  
Sufal Diansyah ◽  
Munandar Munandar ◽  
Afrijal Afrijal
Keyword(s):  
Growth Rate ◽  
Natural Habitat ◽  
Economic Value ◽  
Feed Conversion ◽  
A Value ◽  
Absolute Growth Rate ◽  
Value Range ◽  
Absolute Growth ◽  
The Absolute ◽  
Wild Life

Clownfish (Amphiprion ocellaris) is one reef fish that can be used as ornamental fish saltwater aquarium. The fish has high economic value because the color is attractive. However, this time facing the difficulty found the seeds found in nature as a result of uncontrolled harvesting, especially in the northwest district of Simeulue. The purpose of this study is a way of domestication of clownfish in a population that is almost extinct (endangered) of wild life (natural habitat) into the cultivation environment to determine the viability of a clownfish by administering salinity 32, 30, 28 and 26 ppt performed for 60 the aquariums in a container measuring 60 cm (long), 40 cm (wide) and 40 cm (high). The results showed that administration of different salinity did not significantly affect survival (p>0.05), while the absolute growth rate and feed conversion showed significant results (p<0.05), the value range of the absolute growth rate was ± 0.0014 to 0.00444 grams of feed conversion has a value range of ± 1,311- 5.190 grams.

scholarly journals Spatial-Temporal Instability of an Inviscid Shear Layer

2017 ◽  
Vol 2017 ◽  
pp. 1-7
Author(s):  
Qing-fei Fu ◽  
Li-zi Qin ◽  
Li-jun Yang
Keyword(s):  
Growth Rate ◽  
Shear Layer ◽  
Convective Instability ◽  
Velocity Ratio ◽  
Absolute Instability ◽  
Temperature Ratio ◽  
Oblique Angle ◽  
Absolute Growth Rate ◽  
Absolute Growth ◽  
The Absolute

In this work, we explore the transition of absolute instability and convective instability in a compressible inviscid shear layer, through a linear spatial-temporal instability analysis. From linearized governing equations of the shear layer and the ideal-gas equation of state, the dispersion relation for the pressure perturbation was obtained. The eigenvalue problem for the evolution of two-dimensional perturbation was solved by means of shooting method. The zero group velocity is obtained by a saddle point method. The absolute/convective instability characteristics of the flow are determined by the temporal growth rate at the saddle point. The absolute/convective nature of the flow instability has strong dependence on the values of the temperature ratio, the velocity ratio, the oblique angle, and M number. A parametric study indicates that, for a great value of velocity ratio, the inviscid shear layer can transit to absolute instability. The increase of temperature ratio decreases the absolute growth rate when the temperature ratio is large; the effect of temperature ratio is opposite when the temperature ratio is relatively small. The obliquity of the perturbations would cause the increase of the absolute growth rate. The effect of M number is different when the oblique angle is great and small. Besides, the absolute instability boundary is found in the velocity ratio, temperature ratio, and M number space.

A comparative study on the nursery culture of hatchery-reared sub-adult cupped oyster, Crassostrea iredalei (Faustino, 1932), in an earthen pond and a mangrove canal

2018 ◽  
Vol 26 (4) ◽  
pp. 217-222
Author(s):  
Premwadee Chueachat ◽  
Woraporn Tarangkoon ◽  
Suwat Tanyaros
Keyword(s):  
Growth Rate ◽  
Comparative Study ◽  
Condition Index ◽  
Daily Growth ◽  
Nursery Culture ◽  
Absolute Growth Rate ◽  
Significant Difference ◽  
Adult Oyster ◽  
Absolute Growth ◽  
The Mean

Abstract A comparative study on the nursery culture of the spat of the tropical oyster, Crassostrea iredalei, in an earthen pond and a mangrove canal was conducted over two months. The results revealed no differences in the absolute growth rate determined by shell width between the two culture sites (P < 0.05). Sub-adult oysters cultured in the mangrove canal showed a higher absolute growth rate in shell length and a higher daily growth rate than the oysters cultured in the earthen pond (P < 0.05). The mean survival rate of sub-adult oysters cultured in the earthen pond (99.8 ± 0.2%) was significantly higher than for those cultured in the mangrove canal (66.7 ± 31.4%). Decreased density from the loss of sub-adult oyster nursery culture in the mangrove canal led to higher growth performance than in the earthen pond. However, no difference was found for the fraction of oysters larger or smaller than 5 cm for the two culture sites (P < 0.05). A significant difference was noted in the Condition Index (CI) between the two culture sites (P < 0.05). The high primary productivity in mangroves is a major supporter of higher CI in sub-adult oysters cultured in mangrove canals versus in earthen ponds. Water exchange in the earthen pond to maintain calcium and magnesium concentrations resulted in no differences in the shell compressibility of sub-adult oysters compared with those cultured in the mangrove canal.

scholarly journals Soil preparation and NPK fertilization in the planting of five Atlantic Rainforest species in a clay extraction area

2020 ◽  
Vol 42 ◽  
pp. e36
Author(s):  
Ana Paula Braido Pinheiro ◽  
Adriele Dos Santos Jardim ◽  
João Vitor Garcia Silva ◽  
Adriano Alves Fernandes ◽  
Fábio Ribeiro Pires ◽  
...  
Keyword(s):  
Growth Rate ◽  
Experimental Design ◽  
Native Species ◽  
Atlantic Rainforest ◽  
Extraction Area ◽  
Absolute Growth Rate ◽  
Absolute Growth ◽  
Soil Preparation ◽  
Number Of Leaves ◽  
Npk Fertilization

The occurrence of degraded areas worldwide grows each year and measures must be taken to mitigate degradation and to recover these areas. The aim of this study was to assess the effect of soil preparation and NPK levels on the growth of five native species of the Atlantic Rainforest in clay extraction area. The experimental design was randomized block in a split-split plot arrangement with four replications. Subsoiling and scarification soil preparation represented main plots.  Doses of NPK 04-14-08: 0; 40; 80;160; and 320 g pit-1 represented subplots and Atlantic Rainforest native species represented sub-subplots. Absolute growth rate, stem diameter and number of leaves were evaluated, 210 days after planting. The type of soil preparation did not influence the development of the species. The best dose for Dalbergia ecastaphyllum, Inga laurina, Protium heptaphyllum and Psidium cattleyanum were 176.49, 150.18, 199.25 and 166.48 g pit-1 of NPK, respectively. Schinus terebinthifolius was highly responsive to planting fertilization, being recommended 320 g pit-1 of NPK. All species are indicated for area recovery.

Latitude and Relative Growth in the Razor Clam, Siliqua Patula

1931 ◽  
Vol 8 (3) ◽  
pp. 228-249
Author(s):  
F. W. WEYMOUTH ◽  
H. C. McMILLIN ◽  
WILLIS H. RICH
Keyword(s):  
Growth Rate ◽  
Life Span ◽  
Relative Growth Rate ◽  
Growth Data ◽  
Natural Conditions ◽  
Relative Growth ◽  
Absolute Growth Rate ◽  
Mathematical Expressions ◽  
Wide Range ◽  
Absolute Growth

1. The present paper is a study of the growth of a clam (Siliqua patula) under natural conditions and over a wide range of latitude. 2. Various constants derived from the growth data are compared for the different localities. For this species, over the range considered, growth in the southern localities as compared with the northern is initially more rapid but less sustained, leads to a smaller total length and is associated with a shorter life span. 3. Reasons are presented for considering the relative growth-rate as a particularly significant constant leading to more sound biological conclusions than the use of the absolute growth-rate. 4. On the basis of the relative growth-rate, current mathematical expressions for the course of growth are discussed and a formula used which emphasises Minot's conception of a growth-rate constantly declining with age. This expression L = Be-ce-ce-kt, in which L = length at time t, e = base of natural logarithms, and B, c and k are constants, is found to graduate the extensive data in clam growth with significant accuracy.

Growth and Development of Bulbous Oatgrass (Arrhenatherum elatiusvar.bulbosum)

1990 ◽  
Vol 4 (4) ◽  
pp. 843-848 ◽  
Author(s):  
Karin Tanphiphat ◽  
Arnold P. Appleby
Keyword(s):  
United States ◽  
Growth Rate ◽  
Growth And Development ◽  
Perennial Grass ◽  
The United States ◽  
Willamette Valley ◽  
Stem Base ◽  
Absolute Growth Rate ◽  
Early Autumn ◽  
Absolute Growth

Bulbous oatgrass, a weed in parts of the United States and Europe, is an unusual grass, which forms corms at the stem base. Growth and development of this creeping perennial grass was investigated in the field and in pots outdoors. Under the mild climate of the Willamette Valley, Oregon, shoots emerged in early autumn. Plants grew vegetatively and formed corms during the winter and spring. Aboveground portions of the plant stopped growing and senesced in the summer. The absolute growth rate of the plants was highest in early May, shortly before the onset of flowering. In early May, the growth rate of corms was higher than that of the shoot.

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