Changes in quantity of mineral nitrogen in three grassland soils as affected by intensity of nitrogen fertilization

1980 ◽  
Vol 1 (1) ◽  
pp. 51-63 ◽  
Author(s):  
W. H. Prins
Keyword(s):  
Nitrogen Fertilization ◽  
Mineral Nitrogen ◽  
Grassland Soils

scholarly journals Plant density and mineral nitrogen fertilization influencing yield, yield components and concentration of oil and protein in soybean grains

Bragantia ◽  
2016 ◽  
Vol 75 (3) ◽  
pp. 362-370 ◽  
Author(s):  
André Sampaio Ferreira ◽  
Alvadi Antonio Balbinot Junior ◽  
Flavia Werner ◽  
Claudemir Zucareli ◽  
Julio Cezar Franchini ◽  
...  
Keyword(s):  
Nitrogen Fertilization ◽  
Yield Components ◽  
Plant Density ◽  
Mineral Nitrogen

scholarly journals Uptake of mineral nitrogen from subsoil by winter wheat

2011 ◽  
Vol 52 (No. 8) ◽  
pp. 377-384 ◽  
Author(s):  
J. Haberle ◽  
P. Svoboda ◽  
J. Krejčová
Keyword(s):  
Winter Wheat ◽  
Nitrogen Fertilization ◽  
Grain Filling ◽  
Triticum Aestivum L ◽  
Mineral Nitrogen ◽  
Clay Loam ◽  
Chernozem Soil ◽  
Mineral N ◽  
Soil Layers ◽  
Fully Depleted

The apparent uptake of mineral nitrogen (N<sub>min</sub>) from top- and subsoil layers during the growth of winter wheat (Triticum aestivum L.) was studied in Prague-Ruzyne on clay loam Chernozem soil in years 1996&ndash;2003. Two (N0,&nbsp;N1) and three treatments, unfertilized (N0), fertilized with 100 kg (N1) and 200 kg (N2) nitrogen per hectare were observed in years 1996&ndash;2000 and 2001&ndash;2003, respectively. The apparent uptake of nitrogen from soil layers was calculated from the changes of N<sub>min</sub> content between sampling terms. Most of available mineral N in the soil down to 90 cm was almost fully depleted between tillering and anthesis in treatment N0. The uptake from subsoil layers was delayed and it continued during the period of grain filling in fertilized treatments. Nitrogen fertilization reduced utilization of N from subsoil. The apparent uptake of N from the zone 50&ndash;120 cm ranged from 21 to 62&nbsp;kg&nbsp;N/ha in&nbsp;N0 and from 15 to 60 kg N/ha in N1 in years 1996&ndash;2000. In years 2001&ndash;2003 the corresponding values (50&ndash;130&nbsp;cm) were 24&ndash;104 kg, 43&ndash;130 kg and 29&ndash;94 kg N/ha in treatments N0, N1 and N2, respectively. The uptake from 120&nbsp;(130)&ndash;150 cm was around zero in a half of experimental years, and it reached at maximum 12 kg/ha in N0 in 1997. There was a strong linear relation between the amount of N<sub>min</sub> in spring and the depletion of nitrogen from the zone 50&ndash;120 (130) cm, R<sup>2 </sup>= 0.94, 0.91 and 0.99 in N0, N1 and N2, respectively.

scholarly journals Chronic nitrogen fertilization and carbon sequestration in grassland soils: evidence of a microbial enzyme link

2015 ◽  
Vol 126 (3) ◽  
pp. 301-313 ◽  
Author(s):  
Valeria L. Cenini ◽  
Dario A. Fornara ◽  
Geoffrey McMullan ◽  
Nigel Ternan ◽  
Kate Lajtha ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Nitrogen Fertilization ◽  
Grassland Soils ◽  
Microbial Enzyme

scholarly journals The Effect of Growth Activators and Plant Growth-Promoting Rhizobacteria (PGPR) on the Soil Properties, Root Yield, and Technological Quality of Sugar Beet

Agronomy ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1262
Author(s):  
Arkadiusz Artyszak ◽  
Dariusz Gozdowski
Keyword(s):  
Plant Growth ◽  
Sugar Beet ◽  
Soil Properties ◽  
Nitrogen Fertilization ◽  
Plant Growth Promoting Rhizobacteria ◽  
Sugar Yield ◽  
Mineral Nitrogen ◽  
Root Yield ◽  
Plant Growth Promoting ◽  
Growth Promoting

The strategy “from farm to fork” assumes a reduction in the usage of fertilizers and plant protection products in EU agriculture. The aim of this study, conducted over the years 2017–2019 in several locations in Poland, is to evaluate the application of growth activators with and without plant growth-promoting rhizobacteria to reduce mineral nitrogen fertilization without negative effects on the root yield. We studied the effect of these activators on selected soil properties. The experimental treatments included the application of the growth activators Penergetic (K + P) and Azoter, which contains the bacteria Azotobacter chroococcum, Azospirillum brasilense, and Bacillus megaterium, before sowing or during vegetation. The nitrogen rates were reduced by 30% in comparison to full nitrogen mineral fertilization (control treatment). In selected experiments, the application of Penergetic and Penergetic with Azoter caused a higher content of nitrate nitrogen (N-NO3) and ammonium nitrogen (N-NH4) after the sugar beet harvest as well as higher contents of mineral nitrogen (Nmin), P, K, and Mg in the soil in comparison to the treatment with the full dose of mineral nitrogen fertilization. The obtained results proved that it was possible to reduce the mineral application of nitrogen by 30% without a decrease in the biological and pure sugar yield, and even with an increase in the sugar yield caused by the application of the growth activators Penergetic (K + P) and Azoter.

scholarly journals Common bean elite lines cultivated under nitrogen fertilization and inoculation with Rhizobium tropici

2015 ◽  
Vol 45 (12) ◽  
pp. 2168-2173
Author(s):  
Helton Santos Pereira ◽  
Leonardo Cunha Melo ◽  
Luís Cláudio de Faria ◽  
Enderson Petrônio de Brito Ferreira ◽  
Fábio Martins Mercante ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Common Bean ◽  
Nitrogen Fertilization ◽  
Field Trials ◽  
Nitrogen Supply ◽  
Mineral Nitrogen ◽  
The Other ◽  
Rhizobium Tropici ◽  
Rhizobium Inoculation ◽  
Biological Nitrogen

ABSTRACT: More efficient strains of Rhizobium have been selected for use in common bean. However, little effort was made with lines selection. The main goals of this research were to verify the presence of interaction involving common bean elite lines utilizing Nitrogen fertilization and Rhizobium inoculation for grain yield and to identify lines with superior yields utilizing biological nitrogen fixation. Eight field trials were conducted at four location-years in Brazilian savanna, using randomized complete blocks design with three replications. Each trial was composed of 17 carioca elite lines. Every two tests in each location were planted side by side, one with mineral nitrogen fertilization (90kg) and the other one with inoculation with Rhizobium tropici SEMIA 4080 strain. Elite lines interaction with nitrogen fertilization/inoculation was not important, so, it is possible to select lines for utilization in both growing systems. In some locations-years, interaction between lines and Rhizobium inoculation was most affected by environment conditions, causing modification in lines classification according to the type of nitrogen supplying used. In general, the lines presented higher yields when fertilized with mineral nitrogen as compared with inoculation. The cultivar 'BRS Pontal' presented high and similar yields under both systems of nitrogen supply.

scholarly journals Successive impact of the nitrogen fertilization of basket willow (Salix viminalis L.) on the canopy architecture in 9th and 10th year of regrowth of shoots

2018 ◽  
Vol 49 ◽  
pp. 00110
Author(s):  
Leszek Styszko ◽  
Janusz Dąbrowski
Keyword(s):  
Nitrogen Fertilization ◽  
Mineral Nitrogen ◽  
Salix Viminalis ◽  
Canopy Architecture ◽  
Biometric Measurements

The purpose of the present paper was an assessment of the successive impact of fertilization with nitrogen on the regrowth dynamics of the shoots of 10 genotypes (three clones and seven varieties) of basket willow (Salix viminalis L.) in the 9th and 10th year of cultivation. In 2008- 2015, mineral nitrogen fertilization was applied in the whole experiment in four doses. The measurements of height and thickness of willow shoots, of the quantity of live and dead shoots in the snag and live and dead snags on the plot were performed in the experiment realized in 2016-2017. Biometric measurements showed that increased mineral nitrogen fertilization in the year of its application intensified shoots growth in height and thickness, yet in the successive impact, in the 9th and 10th year of willow vegetation weakening of shoot regrowth in height and thickness is observed, and the number of live shoots in the snag and live snags on the plot have reduced. In particular, negative successive impact of the nitrogen fertilization on the willow canopy architecture was demonstrated on the objects that were mowed twice in the first 4-year rotation and on the varieties that do not tolerate this treatment.

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