Growth of selected Australian plants in soilless media using coir as a substitute for peat

1998 ◽  
Vol 38 (8) ◽  
pp. 879 ◽  
Author(s):  
C. A. Offord ◽  
S. Muir ◽  
J. L. Tyler
Keyword(s):  
Shoot Growth ◽  
Native Plants ◽  
Physical Characteristics ◽  
Growth Characteristics ◽  
Coir Fibre ◽  
Root And Shoot Growth ◽  
Australian Standard ◽  
Physical And Chemical ◽  
Water Holding ◽  
Coconut Mesocarp

Summary. In 2 experiments coir fibre (coconut mesocarp) was compared with peat as a propagation or potting mix component for selected Australian native plants. The first experiment investigated root and shoot growth on cuttings of Pultenaea parviflora grown in mixes of peat : perlite : sand 4:7:3, coir : perlite : sand 4:7:3 or coir:perlite:sand 3:7:3. No differences in rooting or shoot regrowth were detected even though there were some differences in the chemical and physical characteristics of the mixes. Over 2 months, pH of the coir mixes rose from 3.3 and 3.9 to 5.8 and 5.6, respectively, whilst electrical conductivity decreased from 0.253 and 0.127 dS/m to 0.095 and 0.103 dS/m. The physical characteristics (air-filled porosity and water-holding capacity) of the mixes did not change substantially over time. In the second experiment, Brachyscome multifida var. dilatata, Correa ‘Dusky Bells’, Eucalyptus melliodora and Grevillea × gaudichaudii were potted into peat : sand 1:2, coir:sand 1:2 or coir:sand 1:3; whilst Callicoma serratifolia and Lomandra longifolia were potted into peat:sand 1:2, coir:sand 1:2 or coir:sand 1:5. All taxa and potting mix combinations were subjected to a ‘less frequent’ or ‘more frequent’ watering regime. The physical and chemical characteristics of the mixes were all within the Australian standard recommendations (AS 3743-1996) with the exception of pH which was initially slightly higher than recommended in all mixes. Analysis of growth characteristics over 14 months did not reveal any clear overall differences between mixes, indicating that coir was comparable with peat.

scholarly journals Karakteristik Sosis dengan Fortifikasi β-Caroten dari Labu Kuning (Cucurbita moschata) (Sausage Characteristics as Affected by β-Caroten Fortification of Pumpkin (Cucurbita moschata))

2012 ◽  
Vol 33 (2) ◽  
pp. 111
Author(s):  
Agus Hadi Prayitno ◽  
Firdha Miskiyah ◽  
Afina Viyunnur Rachmawati ◽  
Tombak Mahesa Baghaskoro ◽  
Bekti Putra Gunawan ◽  
...  
Keyword(s):  
Ph Value ◽  
Physical Characteristics ◽  
Sensory Characteristics ◽  
Chemical Characteristics ◽  
Cucurbita Moschata ◽  
Physical Chemical ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Physical And Chemical ◽  
Water Holding

<p>The objectives of the experiment were to evaluate physical, chemical, and sensory characteristics of sausage by using fortification with β-caroten of pumpkin. There were five treatments of fortification with β-caroten of pumpkin as<br />the filler substitutions on sausage processing. The treatments were: 0% (control), 25, 50, 75, and 100% of the filler. There were five replications in each treatment. The data of physical and chemical characteristics from the completely randomized design were analysed by analysis of variance. The data of sensory characteristics were analysed by the analysis of non parametric test of Hedonic Kruskal-Wallis. The results showed that sausage fortified with β-caroten of pumpkin as the filler substitutions up to 100% level on sausage processing affected significantly (P&lt;0.01) on physical characteristics of sausage (decreased water-holding capacity, increased tenderness and it did not affect pH value of sausage), chemical characteristics of sausage (decreased moisture, increased protein, fiber, β-caroten, and it did not affect the fat content of sausage), and sensory characteristics of sausage (increased taste, decreased color, aroma, texture, touchness, and acceptability of sausage).</p><p>(Key words: Sausage, Pumpkin, β-caroten, Physical characteristics, Chemical, Sensory)<br /><br /></p>

scholarly journals ROOT AND SHOOT GROWTH AS INFLUENCED BY OVERHEAD AND FLOATATION IRRIGATION IN JALAPENO PEPPER TRANSPLANTS

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 592c-592
Author(s):  
Daniel I. Leskovar ◽  
Ronald R. Heineman
Keyword(s):  
Root Growth ◽  
Lateral Root ◽  
Root Elongation ◽  
Shoot Growth ◽  
Irrigation Systems ◽  
Growth Compensation ◽  
Length Increase ◽  
Root And Shoot Growth ◽  
Basal Roots ◽  
Water Holding

This study was conducted to investigate how irrigation systems alter root elongation, root morphology, shoot growth characteristics and yield of `TAM-M' jalapeno pepper seedlings. Transplants were grown in containerized trays (18 cm3/cell) for 6 weeks in a greenhouse in Spring 1991. Irrigation systems were: a) floatation (FI), b) 4-week floatation plus 2-week overhead (FI+OI); c) alternate floatation and overhead (FI/OI), and d) overhead (OI). The growing media was maintained between 50 and 20% of its water holding capacity. Between 20 and 41 days after seeding (DAS), FI and FI/OI transplants maintained a constant lateral root length increase. In both FI+OI and OI transplants, lateral root elongation response tended to a `plateau' at ≈ 31 DAS. However, between 31 and 41 DAS, OI transplants had a root growth compensation, increasing the number and length (33%) of basal roots. In FI+OI transplants, basal root growth compensation occurred later in the field. At planting, OI transplants had higher shoot/root ratio (S:R=5) and maintained a higher shoot water potential (ψ= -0.58 MPa) than FI transplants (S:R=3; ψ= -0.69 MPa), respectively. Overhead-irrigated transplants had higher early fruit yields than floatation-irrigated transplants, but total yields were unaffected.

Isolation and identification of IAA producing endosymbiotic bacteria from Gracillaria corticata (J. Agardh)

2016 ◽  
Vol 5 (12) ◽  
pp. 5179
Author(s):  
Ilahi Shaik* ◽  
P. Janakiram ◽  
Sujatha L. ◽  
Sushma Chandra
Keyword(s):  
Acetic Acid ◽  
Culture Filtrate ◽  
Indole Acetic Acid ◽  
Shoot Growth ◽  
High Salinity ◽  
Saline Soils ◽  
Bacterial Strains ◽  
Isolation And Identification ◽  
Endosymbiotic Bacteria ◽  
Root And Shoot Growth

Indole acetic acid is a natural phytohormone which influence the root and shoot growth of the plants. Six (GM1-GM6) endosymbiotic bacteria are isolated from Gracilaria corticata and screened for the production of IAA out of six, three bacterial strains GM3, GM5 and GM6 produced significant amount of IAA 102.4 µg/ml 89.40 µg/ml 109.43 µg/ml respectively. Presence of IAA in culture filtrate of the above strains is further analyzed and confirmed by TLC. As these bacterial strains, able to tolerate the high salinity these can be effectively used as PGR to increase the crop yield in saline soils.

Smart growth characteristics and the spatial pattern of multifamily housing in US metropolitan areas

Urban Studies ◽  
2016 ◽  
Vol 54 (15) ◽  
pp. 3500-3523 ◽  
Author(s):  
Andrew McMillan ◽  
Sugie Lee
Keyword(s):  
Growth Management ◽  
Smart Growth ◽  
Growth Index ◽  
Physical Characteristics ◽  
Growth Characteristics ◽  
Multifamily Housing ◽  
Development Patterns ◽  
Suburban Areas ◽  
The Usa ◽  
Us Census

This paper examines the relationship between smart growth policies and other social and physical characteristics and the supply of multifamily housing units in 202 core-based metropolitan statistical areas (CBSAs) in the USA. Data for this study were gathered from the GeoLytics Neighborhood Change Database for the 1980, 1990, 2000 and 2010 US Census. The smart growth characteristics of each CBSA are determined by a smart growth index and a catalogue of urban containment rankings, while other social and physical characteristics are obtained from the US Census. This allows us to examine potential differences in development patterns between CBSAs with varying levels of sprawl and growth containment policies. Two regression models are used to determine statistically significant relationships between multifamily development patterns and growth management policies, as well as other social and physical characteristics. The results indicate that high levels of sprawl are associated with relatively fewer multifamily units, especially in suburban areas. In addition, several population demographics that may potentially benefit from multifamily units, such as senior citizens, the population in poverty and smaller households, are less likely to live in areas with higher rates of multifamily units. These findings indicate that planners and policymakers should consider the needs of more diverse communities when planning for housing, especially in suburban areas, where housing diversity is constricted.

Effect of sand grain shape on root and shoot growth of wheat seedlings

Geoderma ◽  
2016 ◽  
Vol 265 ◽  
pp. 1-5 ◽  
Author(s):  
J. Lipiec ◽  
A. Siczek ◽  
A. Sochan ◽  
A. Bieganowski
Keyword(s):  
Shoot Growth ◽  
Grain Shape ◽  
Wheat Seedlings ◽  
Root And Shoot Growth

Circadian regulation of grapevine root and shoot growth and their modulation by photoperiod and temperature

2018 ◽  
Vol 222 ◽  
pp. 86-93 ◽  
Author(s):  
Kare P. Mahmud ◽  
Bruno P. Holzapfel ◽  
Yann Guisard ◽  
Jason P. Smith ◽  
Sharon Nielsen ◽  
...  
Keyword(s):  
Shoot Growth ◽  
Circadian Regulation ◽  
Root And Shoot Growth

scholarly journals Silicon reduces aluminum content in tissues and ameliorates its toxic effects on potato plant growth

2016 ◽  
Vol 46 (3) ◽  
pp. 506-512 ◽  
Author(s):  
Athos Odin Severo Dorneles ◽  
Aline Soares Pereira ◽  
Liana Verônica Rossato ◽  
Gessieli Possebom ◽  
Victória Martini Sasso ◽  
...  
Keyword(s):  
Chemical Element ◽  
Shoot Growth ◽  
Aluminum Content ◽  
Solanum Tuberosum L ◽  
Toxic Effects ◽  
Al Content ◽  
Potato Plants ◽  
High Affinity ◽  
Root And Shoot Growth ◽  
Tolerant Genotype

ABSTRACT: Aluminum (Al) is highly toxic to plants, causing stress and inhibiting growth and silicon (Si) is considered beneficial for plants. This chemical element has a high affinity with Al. The aim of this study was to investigate the potential of Si to mitigate the toxic effects of Al on potato ( Solanum tuberosum L.) plants and assess whether this behavior is different among genotypes with differing degrees of sensitivity to Al. Potato plants of the genotypes SMIJ319-7 (Al-sensitive) and SMIF212-3 (Al-tolerant) were grown for fourteen days in nutrient solution (without P and pH 4.5±0.1) under exposure to combinations of Al (0 and 1.85mM) and Si (0, 0.5 and 1.0mM). After this period, shoot and roots of the two genotypes were collected to determine Al content in tissues and assess morphological parameters of root and shoot growth. Roots of both genotypes accumulated more Al than shoots and the Al-tolerant genotype accumulated more Al than the sensitive one, both in roots and in shoot. Furthermore, the presence of 0.5 and 1.0mM Si together with Al reduced the Al content in shoot in both genotypes and in roots of the Al-tolerant genotype, respectively. Si ameliorated the toxic effects of Al with regard to number of root branches and leaf number in both potato genotypes. Si has the potential to mitigate the toxic effects of Al in potato plants regardless of Al sensitivity.

scholarly journals Genotypic differences in root and shoot growth of barley (Hordeum vulgare L.) grown under different salinity levels

Hereditas ◽  
2010 ◽  
Vol 147 (3) ◽  
pp. 114-122 ◽  
Author(s):  
H. Bchini ◽  
M. Ben Naceur ◽  
R. Sayar ◽  
H. Khemira ◽  
L. Ben Kaab-Bettaeïb
Keyword(s):  
Hordeum Vulgare ◽  
Shoot Growth ◽  
Genotypic Differences ◽  
Hordeum Vulgare L ◽  
Root And Shoot Growth ◽  
Salinity Levels

Response of pigeon pea (Cajanus cajan (L.) Millsp.) to plant density and phosphorus fertilizer under dryland conditions

1981 ◽  
Vol 97 (1) ◽  
pp. 119-124 ◽  
Author(s):  
I. P. S. Ahlawat ◽  
C. S. Saraf
Keyword(s):  
Grain Yield ◽  
Shoot Growth ◽  
Plant Density ◽  
Sandy Loam ◽  
Phosphate Fertilizer ◽  
Pigeon Pea ◽  
Phosphorus Fertilizer ◽  
Total N ◽  
Root And Shoot Growth ◽  
Plant Densities

SUMMARYField studies were made for 2 years on a sandy loam soil under dryland conditions of north-west India with three pigeon-pea varieties in relation to plant density and the application of phosphate fertilizer. Varieties Pusa Ageti and P4785 with better developed root system and profuse nodulation had higher grain and stalk yield, and higher N and P yield than Prabhat. Root and shoot growth and root nodulation were adversely affected with increasing plant densities in the range 50 × 103 and 150 × 103 plants/ha. Stalk and total N and P yield increased with increasing plant density. Plant density of 117 × 103 plants/ha produced maximum grain yield of 1·53 t/ha. Phosphorus fertilizer promoted root and shoot growth, intensity and volume of nodulation and increased grain, stalk, N and P yield. The effect of plant density on grain yield was more pronounced in the presence of phosphate fertilizer. The economic optimum rate of P ranged between 22·1 and 23·1 kg/ha under different plant densities.

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