scholarly journals The Proposal for Nutrient Concentration Control Employing Nutrient Uptake and Release by Trapa japonica Inhabiting Lake Izunuma

2010 ◽  
Vol 33 (5) ◽  
pp. 57-61 ◽  
Author(s):  
Masahiro WATANABE ◽  
Takaaki KOYAMA ◽  
Hisao SASAKI
Keyword(s):  
Nutrient Uptake ◽  
Nutrient Concentration ◽  
Uptake And Release

EFFECTS OF ROOT ZONE PH AND NUTRIENT CONCENTRATION ON THE GROWTH AND NUTRIENT UPTAKE OF TOMATO SEEDLINGS

2011 ◽  
Vol 34 (5) ◽  
pp. 640-652 ◽  
Author(s):  
Yun-Im Kang ◽  
Jin-Myeon Park ◽  
Seung-Heui Kim ◽  
Nam-Jun Kang ◽  
Kyoung-Sub Park ◽  
...  
Keyword(s):  
Nutrient Uptake ◽  
Nutrient Concentration ◽  
Root Zone ◽  
Tomato Seedlings

Aquacultural approaches to recycling of dissolved nutrients in secondarily treated domestic wastewaters—I Nutrient uptake and release by artificial food chains

1982 ◽  
Vol 16 (1) ◽  
pp. 37-49 ◽  
Author(s):  
L.Y. Kawasaki ◽  
E. Tarifeño-Silva ◽  
D.P. Yu ◽  
M.S. Gordon ◽  
D.J. Chapman
Keyword(s):  
Nutrient Uptake ◽  
Food Chains ◽  
Dissolved Nutrients ◽  
Artificial Food ◽  
Uptake And Release

Effects of nitrogen fertilization on soil nutrient concentration and phosphatase activity and forage nutrient uptake from a grazed pasture system

2015 ◽  
Vol 154 ◽  
pp. 208-215 ◽  
Author(s):  
Sandra Leanne Dillard ◽  
Charles Wesley Wood ◽  
Brenda Hall Wood ◽  
Yucheng Feng ◽  
Walter Frank Owsley ◽  
...  
Keyword(s):  
Nutrient Uptake ◽  
Phosphatase Activity ◽  
Nitrogen Fertilization ◽  
Nutrient Concentration ◽  
Soil Nutrient ◽  
Grazed Pasture

The importance of environmental factors in soil fertility assessments. II.* Nutrient concentration and uptake

1974 ◽  
Vol 25 (2) ◽  
pp. 309 ◽  
Author(s):  
RC Stefanson ◽  
N Collis-George
Keyword(s):  
Soil Fertility ◽  
Soil Temperature ◽  
Nutrient Uptake ◽  
Physical Environment ◽  
Nutrient Concentration ◽  
Incident Light ◽  
Dry Weight ◽  
Plant Performance ◽  
Plant Responses ◽  
Wide Range

Lettuce plants were grown in two soils under a wide range of controlled conditions in the glasshouse. Assessments were made of the effect of soil temperature, incident light and season, in terms of the nutrient concentration and nutrient uptake in the plant tissue, which was analysed for nitrogen, phosphorus, potassium, magnesium, calcium and sodium. Both the concentration and the uptake of each nutrient were affected significantly by soil temperature and incident light, both between and within seasons. The type of soil had an effect on these estimations, but its significance could not be tested statistically. A considerable number of first and second order interactions between components of the physical environment affected the quantities being examined. These interactions were statistically significant. The value of each nutrient analysed, which is an aspect of plant performance, reflected changes in the physical environment independently of the other nutrients. Often a particular nutrient showed no coincident pattern of responses to the environment when these were measured in terms of dry weight, nutrient concentration in the tissue, or total nutrient uptake. Each nutrient concentration and each nutrient uptake varied as micrometeorological factors in the glasshouse changed. Hence, ambiguous assessments of soil fertility were obtained with all measured plant responses. ____________________ *Part I, Aust. J. Agric. Res., 25: 299 (1974).

scholarly journals Nutrient Uptake in Poinsettia during Different Stages of Physiological Development

1997 ◽  
Vol 122 (4) ◽  
pp. 565-573 ◽  
Author(s):  
Brian E. Whipker ◽  
P. Allen Hammer
Keyword(s):  
Nutrient Uptake ◽  
Nutrient Concentration ◽  
Nutrient Content ◽  
Dry Mass ◽  
Application Rate ◽  
Plant Nutrient ◽  
Fertilizer Rate ◽  
Fertilization Rates ◽  
Total Plant ◽  
Plant Nutrient Content

`Supjibi' poinsettias (Euphorbia pulcherrima Willd.) were grown hydroponically for 15 weeks in nutrient solutions with 100-15-100, 200-30-200, or 300-46-300 (in mg·L-1 of N-P-K) to determine nutrient uptake patterns and accumulation rates. Results indicate that increasing fertilization rates from 100 to 300 mg·L-1 of N and K did not significantly influence the plant dry mass or the nutrient concentration of P, K, Ca, Mg, Na, B, Cu, Fe, Mn, Mo, and Zn in poinsettias. NH4-N concentration in the leaves, stems, and roots were lowest with the 100-mg·L-1 N fertilization rate and increased as the N application rate increased to 200 and 300 mg·L-1. Leaf P concentration levels from 1 week after potting through anthesis were above 1.3%, which exceeds the recommended level of 0.9%. When the plant tissue dry mass for each fertilizer rate was transformed by the natural log and multiplied by the mean tissue nutrient concentration of each fertilizer rate, there were no significant differences among the three fertilization rates when the total plant nutrient content was modeled for N, P, or K. Increasing the fertilizer application rate above 100 mg·L-1 N and K and 15 mg·L-1 P decreased total plant content of Ca, Mg, Mn, and Zn and increased the total plant Fe content. The results of the weekly nutrient uptake based on the total plant nutrient content in this study suggests that weekly fertilization rates should increase over time from potting until anthesis. Rates (in mg) that increase from 23 to 57 for N (with 33% of the total N supplied in the NH4-N form), 9 to 18.5 for P, 19 to 57 for K, 6 to 15 for Ca, and 3 to 8 for Mg can be applied without leaching to poinsettias and produce adequate growth in the northern United States.

scholarly journals Effect of Arbuscular Mycorrhiza and Temperature Control on Plant Growth, Yield, and Mineral Content of Tomato Plants Grown Hydroponically

HortScience ◽  
2013 ◽  
Vol 48 (12) ◽  
pp. 1470-1477 ◽  
Author(s):  
Martin Makgose Maboko ◽  
Isa Bertling ◽  
Christian Phillipus Du Plooy
Keyword(s):  
Plant Growth ◽  
Nutrient Uptake ◽  
Temperature Control ◽  
Mycorrhizal Fungi ◽  
Nutrient Concentration ◽  
Growth Yield ◽  
Mineral Nutrient ◽  
Nutrient Concentrations ◽  
Mineral Concentration ◽  
Temperature Controlled

Mycorrhizal inoculation improves nutrient uptake in a range of host plants. Insufficient nutrient uptake by plants grown hydroponically is of major environmental and economic concern. Tomato seedlings, therefore, were treated with a mycorrhizal inoculant (Mycoroot™) at transplanting to potentially enhance nutrient uptake by the plant. Then seedlings were transferred to either a temperature-controlled (TC) or a non-temperature-controlled (NTC) tunnel and maintained using the recommended (100%) or a reduced (75% and 50%) nutrient concentration. Plants grown in the NTC tunnel had significantly poorer plant growth, lower fruit mineral concentration, and lower yield compared with fruit from plants in the TC tunnel. Leaves from plants in the NTC tunnel had higher microelement concentrations than those in the TC tunnel. Highest yields were obtained from plants fertigated with 75% of the recommended nutrient concentration, and not from the 100% nutrient concentration. Application of arbuscular mycorrhizal fungi (AMF) neither enhanced plant growth, nor yield, nor fruit mineral nutrient concentrations. However, temperature control positively affected the fruit Mn and Zn concentration in the TC tunnel following AMF application.

scholarly journals PEG-8000 Alters Morphology and Nutrient Concentration of Hydroponic Impatiens

HortScience ◽  
2005 ◽  
Vol 40 (6) ◽  
pp. 1768-1772 ◽  
Author(s):  
Stephanie Burnett ◽  
Marc van Iersel ◽  
Paul Thomas
Keyword(s):  
Electrical Conductivity ◽  
Polyethylene Glycol ◽  
Nutrient Uptake ◽  
Plant Height ◽  
Nutrient Solution ◽  
Nutrient Concentration ◽  
Nutrient Deficiency ◽  
Foliar Tissue ◽  
Impatiens Walleriana ◽  
Peg 8000

Osmotic compounds, such as polyethylene glycol 8000 (PEG-8000), reduce plant elongation by imposing controlled drought. However, the effects of PEG-8000 on nutrient uptake are unknown. Impatiens `Dazzler Pink' (Impatiens walleriana Hook. F.) were grown hydroponically in modified Hoagland solutions containing 0, 10, 17.5, 25, 32.5, 40, 47.5, 55, or 62.5 g·L–1 PEG-8000. Impatiens were up to 68% shorter than control plants when grown with PEG-8000 in the nutrient solution. Plants treated with PEG-8000 rates above 25 g·L–1 were either damaged or similar in size to seedlings treated with 25 g·L–1 of PEG-8000. Impatiens leaf water potentials (Ψw) were positively correlated with plant height. PEG-8000 reduced the electrical conductivity of Hoagland solutions as much as 40% compared to nontreated Hoagland solutions, suggesting that PEG-8000 may bind some of the nutrient ions in solution. Foliar tissue of PEG-treated impatiens contained significantly less nitrogen, calcium, zinc, and copper, but significantly more phosphorus and nickel than tissue from nontreated impatiens. However, no nutrient deficiency symptoms were induced.

EFFECTS OF FREQUENCY OF IRRIGATION ON NUTRIENT UPTAKE OF APPLE TREES

1986 ◽  
Vol 66 (1) ◽  
pp. 177-180 ◽  
Author(s):  
G. H. NEILSEN ◽  
D. S. STEVENSON
Keyword(s):  
Nutrient Uptake ◽  
Malus Domestica ◽  
Nutrient Concentration ◽  
Irrigation Frequency ◽  
Apple Trees ◽  
N Nutrition ◽  
Malus Domestica Borkh ◽  
Growing Seasons ◽  
Leaf Nutrient Concentration ◽  
Leaf N

Throughout the 1980–1983 growing seasons, ’Summerland Red McIntosh’ apple (Malus domestica Borkh.) on M.26 rootstock growing outdoors in large buried pots with a range of N nutrition were irrigated daily or twice weekly with the same quantity of water (equivalent to 5.9 mm∙day−1) Irrigation frequency affected leaf nutrient concentration; leaf Mn and Zn increased in 3 of 4 yr, leaf Ca and Mg in 2 yr and leaf N in 1 yr at the daily irrigation frequency.Key words: Irrigation frequency, McIntosh apple trees, leaf N, leaf Ca, leaf Mg, leaf Zn, leaf Mn

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