Italian ryegrass and nitrogen source fertilization in western Oregon in two contrasting climatic years. II. Plant nitrogen accumulation and soil nitrogen status

1997 ◽  
Vol 20 (4-5) ◽  
pp. 429-439 ◽  
Author(s):  
Stephen M. Griffith ◽  
Stephen C. Alderman ◽  
Donald J. Streeter
Keyword(s):  
Nitrogen Source ◽  
Soil Nitrogen ◽  
Italian Ryegrass ◽  
Nitrogen Accumulation ◽  
Nitrogen Status ◽  
Plant Nitrogen

Broccoli growth in response to increasing rates of pre-plant nitrogen. II. Dry matter and nitrogen accumulation

2009 ◽  
Vol 89 (3) ◽  
pp. 539-548 ◽  
Author(s):  
C. J. Bakker ◽  
C. J. Swanton ◽  
A. W. McKeown
Keyword(s):  
Soil Nitrogen ◽  
Nitrogen Use Efficiency ◽  
Crop Residues ◽  
Nitrogen Loss ◽  
Nitrogen Accumulation ◽  
Nitrogen Use ◽  
Plant Nitrogen ◽  
Soil Nitrogen Dynamics ◽  
Use Efficiency ◽  
Tissue Nitrogen

An understanding of plant nitrogen accumulation and soil nitrogen dynamics is needed to develop management practices that balance nitrogen requirements of vegetable crops with environmental protection. Field trials were conducted in 2001 and 2002 to determine the interaction of increasing rates of pre-plant nitrogen fertilizer with broccoli tissue nitrogen accumulation and soil nitrogen dynamics. Broccoli cultivars Decathlon and Captain were grown with seven rates of nitrogen (0, 50, 100, 150, 200, 300, 400 kg N ha-1) applied pre-plant as ammonium nitrate. Rate of nitrogen accumulation by the above-ground tissue biomass varied over time and among nitrogen treatments, ranging from 1 to 16 kg N ha-1 d-1. At harvest, tissue nitrogen was high, but nitrogen use efficiency was low when high rates of nitrogen were applied. Soil NO3--N content decreased from planting to harvest. At harvest, soil NO3--N increased with increasing rates of nitrogen, with the majority of NO3--N found in the top 0 to 30 cm of the soil. At 200 kg ha-1 applied nitrogen, plants recovered essentially all of the estimated available nitrogen and there appears to be little risk of nitrogen loss during the growing season. Approximately 130 kg N ha-1 was supplied by the soil during the cropping season. Soil and crop residues at harvest ranged from 96 to 330 kg N ha-1. This residual fertility poses a risk for nitrogen loss. Practical and cost-effective strategies are needed to manage residual nitrogen in the soil and crop residues to minimize loss and retain this nitrogen for subsequent crops. Key words: Brassica oleracea L. italica Plenck, nitrogen budget, nitrogen rates, nitrogen use efficiency, nutrient management

scholarly journals Systemic Signaling of the Plant Nitrogen Status Triggers Specific Transcriptome Responses Depending on the Nitrogen Source in Medicago truncatula

2008 ◽  
Vol 146 (4) ◽  
pp. 2020-2035 ◽  
Author(s):  
Sandrine Ruffel ◽  
Sandra Freixes ◽  
Sandrine Balzergue ◽  
Pascal Tillard ◽  
Christian Jeudy ◽  
...  
Keyword(s):  
Nitrogen Source ◽  
Medicago Truncatula ◽  
Nitrogen Status ◽  
Plant Nitrogen ◽  
Systemic Signaling

scholarly journals Urea-Doped Calcium Phosphate Nanoparticles as Sustainable Nitrogen Nanofertilizers for Viticulture: Implications on Yield and Quality of Pinot Gris Grapevines

Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1026
Author(s):  
Federica Gaiotti ◽  
Marco Lucchetta ◽  
Giacomo Rodegher ◽  
Daniel Lorenzoni ◽  
Edoardo Longo ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Nitrogen Source ◽  
Foliar Application ◽  
N Fertilization ◽  
Plant Nitrogen ◽  
Yield And Quality ◽  
Berry Quality ◽  
Potential Benefits ◽  
Calcium Phosphate Nanoparticles

In recent years, the application of nanotechnology for the development of new “smart fertilizers” is regarded as one of the most promising solutions for boosting a more sustainable and modern grapevine cultivation. Despite showing interesting potential benefits over conventional fertilization practices, the use of nanofertilizers in viticulture is still underexplored. In this work, we investigated the effectiveness of non-toxic calcium phosphate nanoparticles (Ca3(PO4)2∙nH2O) doped with urea (U-ACP) as a nitrogen source for grapevine fertilization. Plant tests were performed for two years (2019–2020) on potted adult Pinot gris cv. vines grown under semi-controlled conditions. Four fertilization treatments were compared: N1: commercial granular fertilization (45 kg N ha−1); N2: U-ACP applied in fertigation (36 kg N ha−1); N3: foliar application of U-ACP (36 kg N ha−1); C: control, receiving no N fertilization. Plant nitrogen status (SPAD), yield parameters as well as those of berry quality were analyzed. Results here presented clearly show the capability of vine plants to recognize and use the nitrogen supplied with U-ACP nanoparticles either when applied foliarly or to the soil. Moreover, all of the quali–quantitative parameters measured in vine plants fed with nanoparticles were perfectly comparable to those of plants grown in conventional condition, despite the restrained dosage of nitrogen applied with the nanoparticles. Therefore, these results provide both clear evidence of the efficacy of U-ACP nanoparticles as a nitrogen source and the basis for the development of alternative nitrogen fertilization strategies, optimizing the dosage/benefit ratio and being particularly interesting in a context of a more sustainable and modern viticulture.

INFLUENCE OF SINGLE STRAINS AND A COMMERCIAL MIXTURE OF Bradyrhizobium japonicum ON GROWTH, NITROGEN ACCUMULATION AND NODULATION OF TWO EARLY-MATURING SOYBEAN CULTIVARS

1988 ◽  
Vol 68 (2) ◽  
pp. 411-418 ◽  
Author(s):  
L. D. BAILEY
Keyword(s):  
Glycine Max ◽  
Soil Temperature ◽  
Bradyrhizobium Japonicum ◽  
Nodule Formation ◽  
Growth Stages ◽  
Nitrogen Accumulation ◽  
Plant Nitrogen ◽  
Commercial Mixture ◽  
Early Maturing ◽  
Glycine Max L

Seven single strains and a commercial mixture of Bradyrhizobium japonicum were evaluated in association with two early-maturing Canadian soybean (Glycine max (L.) Merrill) cultivars, Maple Presto and Maple Amber. Inoculated and uninoculated plants were grown in pails outdoors. Soil temperature at 15 cm depth was monitored throughout the experiment. At the V2, V3, R2 and R4 growth stages, whole plants were removed from the pails. Nodules were counted and weighed; roots and tops were separated, weighed and analyzed for total nitrogen. Bradyrhizobium japonicum strains 61A148, 61A196, 61A194 and 61A155 were similar in effectiveness, but superior to strains 61A124a, 61A118b, 61A101c and the commercial mixture in earliness of nodule formation, number and weight of nodules per plant, and in promoting greater root and top growth and plant nitrogen accumulation. There were indications that soil temperature may have affected nodulation. Maple Amber showed the greater potential for symbiotic nitrogen fixation. This cultivar supported earlier nodulation, had a greater number of nodules, accumulated more nitrogen in the tops and roots and had greater growth than Maple Presto.Key words: Soybean, Glycine max (L.) Merrill, soil temperature, soybean growth stages, Bradyrhizobium, nodulation

Impacts of Bioinoculants Pseudomonas jesenii MP1 and Rhodococcus qingshengii S10107 on Chickpea (Cicer arietinum L.) Yield and Soil Nitrogen Status

Pedosphere ◽  
2019 ◽  
Vol 29 (3) ◽  
pp. 388-399 ◽  
Author(s):  
Divya JOSHI ◽  
Ramesh CHANDRA ◽  
Deep Chandra SUYAL ◽  
Saurabh KUMAR ◽  
Reeta GOEL
Keyword(s):  
Cicer Arietinum ◽  
Soil Nitrogen ◽  
Nitrogen Status ◽  
Cicer Arietinum L
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