Nitrogen is one of the most important macronutrients required by plants. All proteins consist of nitrogen-containing amino acids. Heme components of the chlorophylls, nitrogenous bases of DNA and RNA, and phenylpropanoids (such as flavonoids) are all nitrogen-containing biomolecules.Plants absorb carbon in the form of carbon dioxide …
In this context, several research studies have been conducted that represent the direct relationship between the concentration of internal nitrogen and plant growth and development (Ingestad and Lund, 1986; Ingestad and Agren, 1988). Accordingly, during decreasing nitrogen application, both internal nitrogen concentration and …
Finely ground plant material (0.425 mm) was digested in alkaline potassium persulfate (K2S2O8) at 120°C (0.1 MPa) for 1.5 h in an autoclave, converting organic N to NO-3. Nitrate in the digest ...
Nitrogen leaf levels in some varieties of pecans exceeding 3.50 percent may result in early defoliation. ... The Mg concentration in the plant tends to increase with age. Magnesium deficiencies can be induced by excessive K and NH4-N fertilization. When the soil pH is less than 5.4, Mg availability and uptake by plants is greatly reduced. ...
Like people, plants need nutrients, but too much of a good thing can be a problem. Nutrients, such as nitrogen and phosphorus, occur naturally, but most of the nutrients in our waterways come from human activities and sources—fertilizers, wastewater, automobile exhaust, animal waste. The USGS investigates the source, transport, and …
This method is based on the theory that the concentration of 15 N 2 in the atmosphere is different from the plants and thus the analysis of 15 N 2 of the nitrogen …
Most growers apply water-soluble fertilizers at a dilute concentration on a "constant feed" basis, with mostly every watering to insure an adequate supply of the essential elements for plant growth. Rates of fertilization are often given in parts per million (ppm) of nitrogen (N), which is a way of expressing fertilizer concentration.
Plant family identity distinguishes patterns of carbon and nitrogen stable isotope abundance and nitrogen concentration in mycoheterotrophic plants associated with ectomycorrhizal fungi Ann Bot. 2016 Sep;118(3) :467-79. doi ... We hypothesized that the C and nitrogen (N) stable isotope compositions, and N concentrations of fully and partially ...
The wide nitrogen concentration range of the rice plant samples may have been caused by variation in nitrogen fertilizer treatments applied in the field. We analyzed nitrogen concentrations in different rice tissues, and found that nitrogen content varied by tissues. ... This technique could be used for high-throughput phenotyping of plant ...
The nitrogen concentration (75 mg L –1) used by Yep and Zheng (2020) reflects that of a typical aquaponic solution, but this N concentration is fairly low compared to conventional hydroponic nutrient solutions and may have been a limiting factor for plant growth and yield (Yep et al., 2020b).
Measurement(s) concentration of nitrogen atom in water • phosphorus atom Technology Type(s) machine learning Factor Type(s) geographic location • seasonal measurement • year of data ...
Nitrogen is one of the most important nutrient for plant growth and development; it is strongly associated with a variety of abiotic stress responses. As sessile organisms, plants have evolved to develop efficient strategies to manage N to support …
Plant nitrogen use efficiency (NUE) is an important ecological indicator that reflects the capacity of a plant to transform nitrogen into production, which is essential for further elucidating plant growth and terrestrial ecosystem productivity. ... Wallace LL, Luo Y (2005) Plant nitrogen concentration, use efficiency, and contents in a ...
1.2 15 N 2 Abundance Determination (Mass Spectrometry). 15 N 2 abundance determination and 15 N 2 isotope dilution is a recent, rapid, and highly sensitive method for determination of N 2 in plants and other biological samples, as well as applicable for low and small sample volumes. This method is based on the theory that …
Despite the fact that nitrogen is the most abundant gaseous element in the atmosphere, plants are unable to utilize the element in this form (N 2) and may experience nitrogen deficiency in some ...
Will elevated carbon dioxide concentration amplify the benefits of nitrogen fixation in legumes? Plant Physiol . 2009 Nov;151(3):1009-16. doi: 10.1104/pp.109.144113.
Wheat plants subjected to different N regimes showed upregulation of aldehyde dehydrogenase upon high concentration of ammonium and nitrate, ... Mazzarini M.J. Relationship between plant nitrogen conservation strategies and the dynamics of soil nitrogen in the arid Patagonian Monte, Argentina. Plant Soil. 2003; 255:595–604. doi: …
Healthy plants often contain 3 to 4 percent nitrogen in their above-ground tissues. This is a much higher concentration compared to other nutrients. Carbon, hydrogen and oxygen, nutrients that don't play a significant role in most soil fertility management programs, are the only other nutrients present in higher concentrations.
Redesigning Rice Photosynthesis to Increase Yield. S. Peng, in Studies in Plant Science, 2000 Physiological factors. Leaf nitrogen concentration.A linear relationship between light-saturated P n and leaf N concentration per unit leaf area (N a) was reported in rice when N a ranged from 0.5 to 2.1 g m −2 (Yoshida and Coronel 1976, Makino et al …
nitrogen concentration measured by ion selective electrode, leaf tissue nitrogen con- centration, and tomato yield in Florida. Journal of Plant Nutrition, 39 (12), …
In the context of precision farming, quantitative information on plant nitrogen concentration (PNC) is necessary to apply variable rate technologies of top-dressing fertilization. Radiometric measurements are useful for monitoring crop conditions and, in particular, for nitrogen/chlorophyll assessment.
Abstract. Plant nitrogen (N), acquired mainly in the form of nitrate and ammonium from soil, dominates growth and development, and high-yield crop production relies heavily on N fertilization. The mechanisms of root adaptation to altered supply of N forms and concentrations have been well characterized and reviewed, while reports …
Plant nitrogen uptake and metabolism during senescence. ... NUE and shoot nitrogen concentration when plants were grown at low nitrate supply (Good et al., 2007; Shrawat et al., 2008). These results are of particular interest, showing that it is possible to improve NUE by manipulating downstream steps in N-remobilization. ...
Plant uptake of soil nitrogen. Plants require more nitrogen (N) than any other nutrient but only a small portion of the nitrogen in soil is available to plants; 98 % of the nitrogen in soil is in organic forms. Most forms of organic nitrogen cannot be taken up by plants, with the exception of some small organic molecules.
Also, plant sap electrical conductivity can vary according to its Nitrate-N content, among other ions, and an Ion Selective Electrode (ISE) can determine plant sap nitrate concentration. An example of nitrate ISE is the 'TwinNO 3 − B-341' (Horiba, Kyoto, Japan), which is portable for use in-field . This type of electrode has a sensor pad ...
Despite the fact that nitrogen is the most abundant gaseous element in the atmosphere, plants are unable to utilize the element in this form (N 2) and may experience nitrogen deficiency in some ...
Mobility of nitrogen in soil by transpiration-driven mass flow and simple diffusion. While most N is taken up by higher plants from the soil as nitrate (NO 3 −) or ammonium (NH 4 +), most plants prefer NO 3 − as long as the pH in the rooting zone remains favourable (Kronzucker et al., 1997; Britto et al., 2001; Britto and Kronzucker, …
Abstract. Context: N is the vital element for the growth and development of plants out of all the required nutritious compounds. This element plays a key role in most plant metabolic processes ...
Plant water concentration and nitrogen concentration are important variables that can be used to characterize crop growth. There is a close relationship between plant water concentration and nitrogen concentration, which is synchronized and synergistic with the plant growth period (Fig. 1). Therefore, it is necessary to reduce …
Nitrogen nutrition in plants is a key determinant in crop productivity. The availability of nitrogen nutrients in the soil, both inorganic (nitrate and ammonium) and …
1. Introduction. Nitrogen (N) is essential for proteins, nucleic acids, enzymes, denitrifying bacteria, nitrifying bacteria, and ammoniating bacteria [].It is indispensable for plant growth, photosynthesis, energy transfer, and fertilizer synthesis [].However, excess nitrogen can harm aquatic ecosystems, causing eutrophication of …
Plant nitrogen (N) and phosphorus (P) content regulate productivity and carbon (C) sequestration in terrestrial ecosystems. Estimates of the allocation of N and P content in plant tissues and the relationship between nutrient content and photosynthetic capacity are critical to predicting future ecosystem C sequestration under global change.
It is highly soluble and provides an immediate nitrogen boost to plants. However, its excessive use can lead to environmental issues, such as nitrogen runoff and water pollution. Urea: Urea is another common inorganic nitrogen fertilizer. It contains a high concentration of nitrogen and is easily soluble in water.
Nitrogen can also become available for plant use from organic N sources. Before these organic sources are available to plants, they must be converted to inorganic forms. Nitrogen is available to plants as either ammonium (NH4+-N) or nitrate (NO3--N). Manures. Animal manures and other organic wastes can be important sources of N for …
Nitrogen is an essential nutrient for plant growth and development as it represents a major component of various proteins, nucleic acids, enzymes, chlorophyll, …
2. Nitrogen Uptake. N is an essential macronutrient for plants, and it can be acquired from the soil in inorganic forms (NO 3 − and NH 4 +), which are transported …
When the K supply concentration was 0 mM and 12 mM, ... Leaf Amino Acid supply affects photosynthetic and plant nitrogen use efficiency under nitrogen stress. Plant Physiol. 178 174–188. 10.1104/pp.18.00597 [PMC free article] [Google Scholar] Pettigrew W. T. (2008). Potassium influences on yield and quality production for maize, …
