chlorophyll-a concentration Articles
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Secondary production of freshwater zooplankton communities exposed to a fungicide and to a petroleum distillate in outdoor pond mesocosms
Ecological Risk Assessment (ERA) of chemicals in mesocosms requires measurement of a large number of parameters at community scale. Studies on invertebrate communities usually focus on taxonomic approaches which only provide insights into taxonomic structure changes induced by chemicals. In the present study, abundance, biomass (B), theoretical production (P) and instantaneous P/B ratio were ...
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Nitrogen and plant growth regulator influence on ‘champion’ Bermudagrass putting green under reduced sunlight
Managing warm-season turfgrasses with reduced sunlight is challenging due to C4 plant morphological limitations, such as reduced lateral stem growth. Adjusting cultural management practices, such as N and trinexapac-ethyl (TE) [4-(cyclopropyl-a-hydroxy-methylene)-3,5-dioxocyclohexanecarboxylic acid ethyl ester], application may benefit turfgrass performance when sunlight is reduced. Therefore, a ...
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A comparison of three isolines of cotton differing in fiber color for yield, quality, and photosynthesis
Naturally colored cotton (Gossypium hirsutum L.) fibers (CCFs) are eco-friendly for the textile industry because they omit the dyeing process and reduce harmful effluent liquor. However, the low yield and quality of CCFs have greatly affected their development. Limited information is available on the reasons for the low yield and quality of CCFs. The aim of this 2-yr investigation was to compare ...
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Enantioselective toxicity and degradation of the chiral insecticide fipronil in Scenedesmus obliguus suspension system
Fipronil is an effective insecticide, but it present high toxic effect to non‐target aquatic organisms. The enantioselective toxicity and degradation of fipronil enantiomers in the freshwater algae Scenedesmus obliguus suspension were studied in the present study. There was great difference in the acute toxicity of the enantiomers to Scenedesmus obliguus with 72 h median effective ...
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Leaf spectroscopy
Spectroscopy is a precise and non-destructive technique that can tell us about several processes going on in plants and trees. After being integrated into small handheld devices, it can provide instant and accurate results in the field, forests, and laboratories. It replaces several conventional methods, which were time-consuming and often needed weeks of estimation in expensive laboratories. By ...
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Impacts of altered light spectral quality on warm season turfgrass growth under greenhouse conditions
Warm-season turfgrass quality declines under shade due to reduced photosynthesis, increased disease pressure, reduced carbohydrate production, tree root competition, and reduced lateral stem growth. Another factor limiting turfgrass growth and development under tree shade is variable qualities of light filtered by trees. However, effects of various filtered wavelengths on turfgrass performance ...
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Changes in chlorophyll, anthocyanins and phenolic compounds concentration in fresh–cut onion
The minimal processing of onion is practical and convenient to consumers, eliminating the inconvenience of peeling, cutting, unwanted odour and tearing effect. The study aimed to estimate the levels of chlorophyll, anthocyanins and phenolic compounds in fresh–cut onions, triturated in the form. Onions, white and purple, obtained in Pombal–PB were conducted in the Laboratory of Food ...
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Evaluation of air pollution phytotoxicity downwind of a phosphate fertilizer factory in India
The effects of air pollution on plants downwind of a fertilizer factory at Udaipur, India, were studied using three woody perennials. Seedlings of these species including a shrub (Carissa carandas L.), a leguminous avenue tree (Cassia fistula L.) and a fruit tree (Psidium guajava L.) were grown in earthen pots at different study sites receiving varying levels of air pollution input. Changes in ...
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Micronutrient research using leaf area & photosynthesis rates to improve crop yields
With the pressure to increase food production, every agricultural practice that can be optimized for improving crop yield is under scrutiny; therefore, micronutrients, which are important for crop health and growth, are receiving more attention. Agronomists are increasingly studying different treatment methods to establish the easiest and most cost-effective way to improve micronutrient ...
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Damage suffered by swamp morning glory (Ipomoea aquatica Forsk) exposed to vanadium(V)
To elucidate the physiological and morphological responses generated by vanadium (V) in plants, hydroponic culture experiments were performed with swamp morning glory (Ipomoea aquatica Forsk) exposed to 0 to 2.50 mg L−1 pentavalent V [V(V)] in Hoagland nutrient solutions. The concentration of chlorophyll a, chlorophyll b, and carotene peaked at a V(V) concentration of 0.05 mg L−1 and gradually ...
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Ecological characteristics of plankton and aquatic vegetation in Lake Qiluhu
Investigations of the phytoplankton, zooplankton, zoobenthos and aquatic vegetation in Lake Qiluhu were carried out in February, 2009. Over the whole lake, 13 sampling sites were set up for the analysis of phytoplankton and zooplankton, and 22 profiles for the collection of macrophytes and zoobenthos. In the survey, 7 phyla, 65 algae species were identified. The average abundance of ...
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Strategies to make use of plant sensors-based diagnostic information for nitrogen recommendations
Improvements of nitrogen use efficiency (NUE) may be achieved through the use of sensing tools for N status determination. Leaf and canopy chlorophyll, as well as leaf polyphenolics concentrations, are characteristics strongly affected by N availability that are often used as a surrogate to direct plant N status estimation. Approaches with near-term operational sensors, handheld and ...
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Why are we monitoring nutrients at different depths?
Recently, LG Sonic introduced the MPC-Lab, an innovative monitoring buoy that can monitor algae, physico-chemical variables, and even nutrients such as nitrogen and phosphorus in near real-time and at different depths in a body of water. Combined with our other monitoring tools, this system offers a unique way to detect the spatial and temporal patterns of nutrient concentrations which play a ...
By LG Sonic
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