scholarly journals NITROGEN CONTENT IN SOIL AND NITRATE REDUCTASE ACTIVITY IN WINTER WHEAT LEAVES WITH THE USE OF NITROGEN FERTILIZERS

2020 ◽  
Vol 5 (2) ◽  
pp. 13-19
Author(s):  
Natalya Bakaeva
Keyword(s):  
Nitrate Reductase ◽  
Winter Wheat ◽  
Nitrogen Content ◽  
Nitrogen Nutrition ◽  
Reductase Activity ◽  
Soil Layer ◽  
Central Zone ◽  
Vegetation Period ◽  
Nitrogen Fertilizers ◽  
Wheat Leaves

The purpose of the study is increasing the efficiency of using nitrogen fertilizers and its effect on nitrate-reducing capacity of the leaf apparatus. The research was conducted in 2016-2018 in the Central zone of the Samara re-gion. The predecessor is complete fellow. Svetoch winter wheat elite seed varieties were used for sowing. Seeding was carried out in the experimental fields of the laboratory «Agroecology» of the Samara state University. Nitrate and ammonium nitrogen content in soil layer of 0-30 cm depth was estimated before planting and after plant nutri-tion with nitrogen fertilizers in regard to the growth phases (tillering, elongation and heading), the content of nitro-gen, protein and nitrate reductase enzyme activity in leaves during plant development. Dynamics changes of nitro-gen content in the soil and after fertilization with nitrogen shows that during vegetation period of plants, the amount of nitrogen is sufficient for their growth. As the phenological phases of plants change, the content of nitrogen and protein in winter wheat leaves increases, and activity of the enzyme nitrate reductase lifts, which catalyzes nitrate regeneration to nitrite. The value of the activity of the enzyme nitrate reductase in leaves can serve as a criterion for evaluating the availability of plants with the nitrate form of nitrogen. In future, the activity of this enzyme can be used as an indicator of optimizing nitrogen nutrition of plants aimed at metabolic processes. The use of various nitrogen fertilizers, and to a greater extent ammonium nitrate, increased the supply of plants with nitrogen, which is later used by them in the reutilization of nitrogen from leaves to the emerging seed, thus contributing to quality of grain.

scholarly journals Pre-Sowing Irrigation Plus Surface Fertilization Improves Morpho-Physiological Traits and Sustaining Water-Nitrogen Productivity of Cotton

Agronomy ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 772
Author(s):  
Zongkui Chen ◽  
Hongyun Gao ◽  
Fei Hou ◽  
Aziz Khan ◽  
Honghai Luo
Keyword(s):  
Nitrate Reductase ◽  
Root Growth ◽  
Root Length ◽  
Crop Production ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Soil Layer ◽  
Dry Mass ◽  
Cotton Production ◽  
Nitrogen Productivity

The changing climatic conditions are causing erratic rains and frequent episodes of moisture stress; these impose a great challenge to cotton productivity by negatively affecting plant physiological, biochemical and molecular processes. This situation requires an efficient management of water-nutrient to achieve optimal crop production. Wise use of water-nutrient in cotton production and improved water use-efficiency may help to produce more crop per drop. We hypothesized that the application of nitrogen into deep soil layers can improve water-nitrogen productivity by promoting root growth and functional attributes of cotton crop. To test this hypothesis, a two-year pot experiment under field conditions was conducted to explore the effects of two irrigation levels (i.e., pre-sowing irrigation (W80) and no pre-sowing irrigation (W0)) combined with different fertilization methods (i.e., surface application (F10) and deep application (F30)) on soil water content, soil available nitrogen, roots morpho-physiological attributes, dry mass and water-nitrogen productivity of cotton. W80 treatment increased root length by 3.1%–17.5% in the 0–40 cm soil layer compared with W0. W80 had 11.3%–52.9% higher root nitrate reductase activity in the 10–30 cm soil layer and 18.8%–67.9% in the 60–80 cm soil layer compared with W0. The W80F10 resulted in 4.3%–44.1% greater root nitrate reductase activity compared with other treatments in the 0–30 cm soil layer at 54–84 days after emergence. Water-nitrogen productivity was positively associated with dry mass, water consumption, root length and root nitrate reductase activity. Our data highlighted that pre-sowing irrigation coupled with basal surface fertilization is a promising option in terms of improved cotton root growth. Functioning in the surface soil profile led to a higher reproductive organ biomass production and water-nitrogen productivity.

Influence of level of a nitric food on efficiency and quality of grain of winter wheat in the conditions of Predkamya of RT

10.12737/3828 ◽  
2014 ◽  
Vol 9 (1) ◽  
pp. 91-94
Author(s):  
Тагиров ◽  
Marsel Tagirov ◽  
Газизов ◽  
Ilyas Gazizov ◽  
Фадеева ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Nitrogen Nutrition ◽  
Mineral Elements ◽  
Early Spring ◽  
Nitrogen Fertilizers ◽  
Yield Increase ◽  
Grain Productivity ◽  
Plant Stand ◽  
The Republic

Winter wheat productivity and grain quality is largely dependent on the availability of mineral elements of plants throughout the growing season. [2] Early spring fertilization with nitrogen fertilizers contributes to more rapid growth of the root system, further tillering, strengthening of ear shoots development and highest yield increase. Application of fertilizers, containing micronutrients (Akvarin 5), having a complex effect on plants, is perspective in high quality grain production. In this paper, we studied the effect of nitrogen nutrition and trace elements on grain productivity and quality, perspective and zoned species in the Republic of Tatarstan. Spring introduction of nitrogen in the form of ammonium nitrate leads to an increase the density of productive plant stand to 10.0%, crop yield to 20%. Treating the plant by Akvarin5 preparation in tillering period, it increases the density of plant stand of winter wheat on average 2.89%, productivity to 4.3% or 0.21 tons per hectare, compared to one with a nitrogen fertilizing. Akvarin 5 preparation leads to weight rising of 1000 grains more significant at making it in earing - flowering phase, than in the phase of tillering. It also increases the weight of the grain and gluten content. A greater influence on the nature of grain has a nitrogen fertilizer, than treatment by Akvarin 5.

INFLUENCE DE LA TEMPERATURE DU SUBSTRAT ET DE LA FERTILISATION AZOTEE SUR LA CROISSANCE, LE DEVELOPPEMENT, LA TENEUR EN AZOTE ET L’ACTIVITE DE LA NITRATE REDUCTASE CHEZ LA TOMATE

1984 ◽  
Vol 64 (1) ◽  
pp. 181-191 ◽  
Author(s):  
ANDRÉ GOSSELIN ◽  
FRANÇOIS-P. CHALIFOUR ◽  
MARC J. TRUDEL ◽  
GHISLAIN GENDRON
Keyword(s):  
Lycopersicon Esculentum ◽  
Nitrate Reductase ◽  
Nitrogen Content ◽  
Nitrate Reductase Activity ◽  
Root Zone ◽  
Reductase Activity ◽  
Dry Weight ◽  
Fruit Weight ◽  
Root Zone Temperature ◽  
Lycopersicon Esculentum Mill

We measured the effects of five root temperatures (12, 18, 24, 30 and 36 °C) and five rates of nitrogen fertilization (0, 2.5, 7.5, 22.5 and 67.5 meq N∙L−1) on growth, development, nitrogen content and nitrate reductase activity of tomato plants (Lycopersicon esculentum Mill. ’Vendor’). The greatest root dry weight was obtained at 18 °C and 2.5 meq N∙L−1 and the highest shoot dry weight at 24 °C and 22.5 meq N∙L−1. Total fruit weight was maximum at 24 °C and 2.5 meq N∙L−1. High root temperatures and high levels of fertilization increased the number of aborted flowers and the nitrogen content of shoots, but reduced tomato yields. Nitrate reductase activity (NRA) was higher in leaves than in roots and with plants receiving 22.5 meq N∙L−1 as compared to 2.5 meq. NRA in roots decreased as temperature increased.Key words: Lycopersicon esculentum Mill., root zone temperature, nitrate reductase, nitrogen

Regulation of nitrate reductase activity and its involvement in the production of nitric oxide in wheat leaves

2010 ◽  
Vol 435 (1) ◽  
pp. 457-460
Author(s):  
T. V. Trifonova ◽  
N. N. Maksyutova ◽  
L. V. Viktorova ◽  
E. I. Galeeva ◽  
G. G. Yafarova ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Nitrate Reductase ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Wheat Leaves
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