scholarly journals Crescimento e desenvolvimento de Hemerocallis fulva submetidos a doses de nitrogênio e fósforo

2015 ◽  
Vol 21 (3) ◽  
pp. 351
Author(s):  
Francimar Perez Matheus da Silva ◽  
Graziane Maria Giacon ◽  
Jackeline Schultz Soares ◽  
Yara Brito Chaim Jardim Rosa ◽  
Derek Brito Chaim Jardim Rosa ◽  
...  
Keyword(s):  
Root System ◽  
Plant Root ◽  
Leaf Tissue ◽  
Nutrient Content ◽  
Dry Mass ◽  
Phosphorus Fertilization ◽  
Nitrogen And Phosphorus ◽  
Coverage Area ◽  
P Content ◽  
Plant Root System

The objective was to evaluate the effect of different doses of nitrogen and phosphorus on growth and development of Hemerocallis fulva variety Flore Full, herbaceous perennial widely used in landscaping. The experimental design was randomized blocks with 25 treatments, arranged in a factorial 5 x 5 (0; 75; 150; 225 and 300 kg ha-1 N and 0, 100, 200, 300 and 400 kg ha-1 P), with 4 replicates. The phosphorus fertilization was carried out 15 days after planting (DAP) and nitrogen was applied in coverage divided in three equal applications at 15, 120 and 240 DAP. There were evaluated the plant height, number of tillers per plant, soil coverage area, the fresh mass of plant, root system and shoot; and the dry mass of plant, root system and aerial part, and calculated the ratio of root dry mass and plant dry mass. It was also obtained the nutrient content of the leaf tissue and root system. The highest tillering was gained with the use of 150 kg ha-1 N combined with 400 kg ha-1 of P. Intermediate doses of N (75-170 kg ha-1 of N) showed higher production of plant fresh and dry mass and root dry mass. Doses of N and P influenced the N and P content in plant tissues of roots and leaves of Hemerocallis. Plants fertilized with 300 kg ha-1 of N and 273 kg ha -1 of P lead to the highest levels of N in the leaves and doses of 80 kg ha-1 of N and 68 kg ha-1 P, the highest content of P in the leaves of H. fulva. Already, in the roots, the highest N content was obtained with application of 300 kg ha-1 N in the presence of P and doses of 225 kg N ha-1 combined with 300 ha-1 P provided the highest P content in the roots.

scholarly journals Growth and nutrient concentration in coffee root system under weed species competition

2007 ◽  
Vol 25 (4) ◽  
pp. 679-687 ◽  
Author(s):  
C.P. Ronchi ◽  
A.A. Terra ◽  
A.A. Silva
Keyword(s):  
Root System ◽  
Dry Matter ◽  
Nutrient Concentration ◽  
Plant Root ◽  
Nutrient Content ◽  
Weed Species ◽  
Bidens Pilosa ◽  
Free Treatment ◽  
Coffee Plants ◽  
Plant Root System

The effects of competition of six weed species on growth, nutrient concentration and nutrient content of coffee plant root system under greenhouse conditions were evaluated. Thirty days after coffee seedling transplantation into 12 L pots with soil level area of 6.5 dm². Weeds were transplanted or sowed in these pots, at densities of 0, 1, 2, 3, 4 and 5 plants per pot. The duration of competition (or weedy periods) from weed transplantation or emergence until plant harvesting, at the weed preflowering stage, were (in days): 77 (Bidens pilosa), 180 (Commelina diffusa), 82 (Leonurus sibiricus), 68 (Nicandra physaloides), 148 (Richardia brasiliensis) and 133 (Sida rhombifolia). Dry matter of coffee plants was linearly reduced with increasing B. pilosa and S. rhombifolia density, with pronounced effect of B. pilosa. C. diffusa was the only weed species whose increasing density in the pots did not diminish crop root dry matter. L. sibiricus, N. physaloides and R. brasiliensis reduced root dry matter of coffee plants by 75, 52 and 47%, respectively, as compared to the weed-free treatment, regardless of weed density. Under competition, even though weed species showed lower macronutrient concentration in the roots (except for P), they accumulated 4.2 (N), 12.3 (P), 4.3 (K), 5.5 (Ca), 7.6 (Mg) and 4.4 (S) times more nutrients in the roots than the coffee plants. Crop and weed nutrient concentration, as well as competition degrees greatly varied depending on both weed species and densities.

3D plant root system reconstruction based on fusion of deep structure-from-motion and IMU

2021 ◽  
Author(s):  
Yawen Lu ◽  
Yuxing Wang ◽  
Zhanjie Chen ◽  
Awais Khan ◽  
Carl Salvaggio ◽  
...  
Keyword(s):  
Root System ◽  
Structure From Motion ◽  
Deep Structure ◽  
Plant Root ◽  
System Reconstruction ◽  
Plant Root System

A 3D-printed, Arabidopsis Thaliana Root Imaging Platform

Lab on a Chip ◽  
2021 ◽  
Author(s):  
Michel Moussus ◽  
Matthias Meier
Keyword(s):  
Molecular Dynamics ◽  
Arabidopsis Thaliana ◽  
High Resolution ◽  
Root System ◽  
Plant Root ◽  
Microfluidic Platforms ◽  
External Cues ◽  
3D Printed ◽  
Plant Root System ◽  
Analytical Tools

High resolution live imaging promises new insights into the cellular and molecular dynamics of the plant root system in response to external cues. Microfluidic platforms are valuable analytical tools that...

scholarly journals An easily operated apparatus to register the amount of the aqueous solution absorbed by a plant root system

2015 ◽  
Vol 41 (2) ◽  
pp. 187-196 ◽  
Author(s):  
Jerzy Czerski
Keyword(s):  
Aqueous Solution ◽  
Root System ◽  
Plant Root ◽  
Plant Root System

An easily operated apparatus was constructed (figs. 1,2) allowing to register the amount of the aqueous solution absorbed by a planet root system. The device allows for simultaneous registering of the solution absorption by two plants. The recording of a definite volume of the absorbed solution can be controlled within wide limits. Experiments (figs. 3,4) confirmed the efficiency of the apparatus.

scholarly journals Crescimento inicial da berinjeleira sob adubação nitrogenada e fosfatada e irrigada com água de reúso

2015 ◽  
Vol 10 (3) ◽  
pp. 34 ◽  
Author(s):  
Aldair de Souza Medeiros ◽  
Reginaldo Gomes Nobre ◽  
Eliane da Silva Ferreira ◽  
Whalamys Lourenço de Araújo ◽  
Manoel Moises Ferreira de Queiroz
Keyword(s):  
Reclaimed Water ◽  
Weather Conditions ◽  
Dry Mass ◽  
Industrial Sector ◽  
Treated Wastewater ◽  
Intermittent Flow ◽  
Phosphorus Fertilization ◽  
Initial Growth ◽  
Nitrogen And Phosphorus ◽  
Sand Filter

<p><span>A utilização da água vem gerando alguns conflitos devido o aumento da escassez hídrica em todo o mundo, os setores de maior consumo são a agricultura responde por 70%, o setor industrial 22% e 8% corresponde ao uso doméstico. Objetivou-se com este trabalho avaliar os efeitos causados pelas doses de nitrogênio e fósforo e a irrigação com água de reúso doméstica pós-tratada em filtro de areia com fluxo intermitente durante o crescimento inicial da berinjeleira na região semiárida paraibana. O experimento foi realizado em ambiente protegido, no Centro de Ciências e Tecnologia Agroalimentar (CCTA/UFCG), Campus de Pombal – PB, e cujos tratamentos resultaram na combinação de dois fatores: quatro doses de adubação nitrogenada (N<sub>1 </sub>- 3,55; N<sub>2</sub> - 6,2; N<sub>3</sub> - 8,9; N<sub>4</sub> - 11,55 g de N/vaso) e quatro doses de adubação fosfatada (P<sub>1</sub> - 15,28; P<sub>2</sub> - 26,74; P<sub>3</sub> - 38,2; P<sub>4</sub> - 49,66 g de P/vaso) correspondendo respectivamente a 40; 70; 100; 130% conforme indicação de adubação para a cultura da berinjela quando cultivada em vasos, irrigada com água de reúso pós-tratada em filtro de areia intermitente (AR). O delineamento experimental adotado foi o de blocos inteiramente casualizados, com os tratamentos arranjados em esquema fatorial 4 x 4, com quatro repetições. Conclui-se que a prática da irrigação com água de reúso surge como uma fonte hídrica e nutricional para a cultura da berinjela, nas condições edafoclimáticas do semiárido; Doses de 3,55 g de N e 15,28 g de P por planta quando se utiliza água de reúso na irrigação de plantas de berinjela são suficientes para suprir as necessidades nutricionais da cultura. A massa fresca da folha de plantas de berinjela decresceu linearmente com o incremento das doses de N aplicadas. A produção de massa fresca e seca da parte aérea de plantas de berinjela irrigadas com água de reúso com 40% da adubação com N e P não diferiu das plantas que receberam 100% indicação de N e P.</span></p><p align="center"><strong><em>Eggplant early growth under nitrogen and phosphate and irrigated with reuse water</em></strong></p><p><strong>ABSTRACT - </strong>The use of water has generated some conflicts due to increasing water scarcity around the world, the largest consumer sectors are agriculture accounts for 70 %, the industrial sector 22% and 8% corresponds to the household. The objective of this study was to evaluate the effects caused by nitrogen and phosphorus and irrigation with reclaimed water post- treated domestic sand filter with intermittent flow during the initial growth of eggplant in Paraíba semi-arid region.The experiment was conducted in a greenhouse, in the Science and Technology Center Agrifood (CCTA / UFCG), Campus de Pombal - PB, and the treatments resulted in the combination of two factors: four doses of nitrogen (N1 - 3.55; N2 - 6.2; N3 - 8.9; N4 - 11.55 g N / pot) and four doses of phosphorus fertilization (P1 - 15.28; P2 - 26.74; P3 - 38.2; P4 - 49 66 g P / pot) corresponding respectively to 40; 70; 100; 130% as fertilizer indication for eggplants when grown in pots irrigated with treated wastewater post-intermittent sand filter (AR). The experimental design was a completely randomized design, with treatments arranged in a factorial 4 x 4, with four replications. We conclude it the practice of irrigation with reclaimed water emerges as a water and nutrient source for the eggplant crop, soil and weather conditions in the semiarid; Doses of 3,55 g of N and 15,28 g P per plant when using reclaimed water in irrigation eggplants are sufficient to meet the nutritional needs of the crop. The fresh weight of eggplants sheet decreased linearly with increasing N rates. The production shoot fresh and dry mass of eggplant plants irrigated with reclaimed water to 40% of fertilization with N and P did not differ from plants that received 100 % of N and P indication.</p><p><span><br /></span></p>

scholarly journals Phosphorus fertilization and growth of buffel grass (Cenchrus ciliares L.) cultivars

2015 ◽  
Vol 19 (1) ◽  
pp. 34-38
Author(s):  
Vanderlise Giongo ◽  
Alessandra M. Salviano ◽  
Betina R. C. dos Santos ◽  
Emylly F. Leal
Keyword(s):  
Critical Level ◽  
Dry Mass ◽  
Phosphorus Fertilization ◽  
Critical Levels ◽  
Buffel Grass ◽  
P Accumulation ◽  
P Content ◽  
Phosphorus Requirement ◽  
Set Up

Phosphorus (P) plays an important role in the growth of root system as well as the tillering grass, being fundamental to increase the productivity of these species. The aim of this study was to evaluate the development of buffel grass cultivars and establish critical values of P in plant and soil. The experimental set up was a 4 x 5 factorial scheme (four Cenchrus ciliaris cvs.: Biloela, Aridus, CPATSA 7754 and Pusa Giant, and five doses of P2O5 - 0, 30, 60, 90 and 120 kg ha-1) with four replications. After 90 days of cultivation, dry mass of shoot (DMS) and root (DMR) production and the P accumulation (Pacc) were determined. Soil samples to determine the P content and determination of the critical level (CriLev) were also collected. The cv. Biloela presented lower DMR and DMS production compared to the other cultivars. The cultivares Biloela, Pusa Giant and Aridus showed different critical levels of P in soil and plant, obtained in the greenhouse showing that they have different requirement of this nutrient for their growth. The cultivar CPATSA 7754 showed higher phosphorus requirement and did not permit to establish critical levels with doses used in the present study.

scholarly journals Fertilization during the establishment of a Eucalyptus camaldulensis plantation in the northern Brazilian Amazon.

2012 ◽  
Vol 6 (2) ◽  
pp. 91
Author(s):  
Mirian Cristina Gomes Costa ◽  
Hélio Tonini ◽  
Carlos Tadeu dos Santos Dias ◽  
Bruna De Freitas Iwata
Keyword(s):  
Leaf Tissue ◽  
Eucalyptus Camaldulensis ◽  
Tree Height ◽  
Nutrient Content ◽  
Brazilian Amazon ◽  
Fractional Factorial ◽  
Sustainable Land Use ◽  
Phosphorus Fertilization ◽  
Planted Forests ◽  
Native Forests

Forestry plantations should be regarded as an alternative sustainable land-use system in degraded savannah areas. They contribute to the maintenance of productive processes in degraded soils that are of economic importance for local inhabitants; in addition, in the ecological sense, timber and non-timber products from planted forests reduce the exploitation pressure on native forests. Eucalyptus plantations on degraded savannahs in the northern Brazilian Amazon may help to reduce exploitation pressure on native forests. However, there is no information regarding the nutrients rates that would allow faster eucalyptus growth in that region. A trial was installed in an Yellow Latosol (Oxisol) soil type adopting a one-half-type fractional factorial design with four ates of N, P, and K. Functions were adjusted for the dependent variables height, diameter at breast height (DBH), leaf tissue nutrient content, and soil-chemical attributes. Interaction N versus K was observed on tree height with a maximum of 7.8 m recorded at 200 kg ha-1 of N and 50 kg ha-1 of K. Phosphorus fertilization promoted greater DBH growth with maximum value at 120 kg ha-1 of P; however, the highest gain was obtained at 30 kg ha-1 of P. The NPK rates that maximized Eucalyptus camaldulensis growth were 200, 30, and 50 kg ha-1, respectively.

scholarly journals A single ectomycorrhizal plant root system includes a diverse and spatially structured fungal community

Mycorrhiza ◽  
2019 ◽  
Vol 29 (3) ◽  
pp. 167-180 ◽  
Author(s):  
Ella Thoen ◽  
Anders B. Aas ◽  
Unni Vik ◽  
Anne K. Brysting ◽  
Inger Skrede ◽  
...  
Keyword(s):  
Root System ◽  
Fungal Community ◽  
Plant Root ◽  
Plant Root System

scholarly journals Yield and Nutritional Quality of Cabbage as Affected by Nitrogen and Phosphorus Fertilization

1970 ◽  
Vol 41 (1) ◽  
pp. 41-46
Author(s):  
KMF Haque ◽  
AA Jahangir ◽  
ME Haque ◽  
RK Mondal ◽  
MAA Jahan ◽  
...  
Keyword(s):  
Block Design ◽  
Growth Yield ◽  
Nutrient Content ◽  
Phosphorus Fertilization ◽  
Fertilizer Treatment ◽  
P Fertilization ◽  
Nitrogen And Phosphorus ◽  
Titrable Acidity ◽  
Nitrogen Phosphorus

An experiment was conducted in field condition to study the effect of nitrogen-phosphorus fertilization on growth, yield and nutrient content of cabbage. The experiment was laid out in randomize block design with three replications. The yield and yield components were maximized by N3P2 fertilizer treatment. Nutrient content of cabbage varied with fertilizer treatment. The maximum amount of reducing sugar, ascorbic acid, phosphorus were found at the highest rate of N - P fertilization whereas accumulation of titrable acidity, iron, calcium were maximum at the rate of N2P2 treatment. However pH, ash content were more or less same throughout the experiment. Bangladesh J. Sci. Ind. Res. 41(1-2), 41-46, 2006

scholarly journals Application of a Monopole Antenna Probe with an Optimized Flange Diameter for TDR Soil Moisture Measurement

Sensors ◽  
2020 ◽  
Vol 20 (8) ◽  
pp. 2374
Author(s):  
Jacek Majcher ◽  
Marcin Kafarski ◽  
Andrzej Wilczek ◽  
Aleksandra Woszczyk ◽  
Agnieszka Szypłowska ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Root System ◽  
Plant Root ◽  
Time Domain Reflectometry ◽  
Monopole Antenna ◽  
Field Conditions ◽  
Growth Monitoring ◽  
Electromagnetic Simulations ◽  
The Time Domain ◽  
Plant Root System

Soil volumetric water content (θ) is a parameter describing one of the most important factors conditioning proper plant growth. Monitoring soil moisture is of particular importance in the rational use of water resources for irrigation, especially during periods of water scarcity. This paper presents a method of measuring soil moisture in the vicinity of the plant root system by means of a probe designed to be mounted on a mobile device used for precise plant irrigation. Due to the specific field conditions of the measurement, the design of the probe was proposed as a monopole antenna. Electromagnetic simulations of the probe were carried out with Ansys HFSS software to optimise its dimensions. Then a prototype of the probe was manufactured to conduct laboratory measurements with the use of a vector network analyser (VNA) working in the 20 kHz to 8 GHz frequency range. The VNA analyser was configured to work in the time-domain reflectometry (TDR) mode. From measurements of the time distance between reflections from the probe’s elements it is possible to calculate the bulk dielectric permittivity of the soil surrounding the probe. Next, based on commonly used soil moisture dielectric calibrations one can determine θ of the soil sample. The paper presents simulation results and laboratory tests of an antenna probe. Due to its tough and durable design, this type of probe gives the possibility of easy application in field conditions, which makes it especially suitable for mechanically demanding measurement systems. As the sensitivity zone is comparatively large, this probe is well-suited to measuring soil moisture in the vicinity of the plant root system.

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