scholarly journals Partial Substitution of Mineral Nitrogen Fertilizers by Bio-Fertilizer to Alleviate the Possible Risks of Chemical Pollution for Broccoli Plants

2013 ◽  
Vol 53 (2) ◽  
pp. 175-194
Keyword(s):  
Mineral Nitrogen ◽  
Nitrogen Fertilizers ◽  
Partial Substitution ◽  
Chemical Pollution

Orientation of processes of biological nitrogen transformation in winter rye agroecosystems under different levels of fertilization background

2016 ◽  
Vol 3 (3) ◽  
pp. 28-34
Author(s):  
V. Volkogon ◽  
I. Korotka
Keyword(s):  
Root Zone ◽  
Field Studies ◽  
Nitrogen Transformation ◽  
Mineral Nitrogen ◽  
Nitrogen Fertilizers ◽  
Winter Rye ◽  
Podzolic Soils ◽  
Microbial Preparation ◽  
Biological Nitrogen

Aim. To determine physiologically expedient rates of mineral nitrogen in winter rye production on sod-podzol- ic soils based on the orientation of the processes of biological nitrogen transformation in the plants rhizosphere. Methods. Field studies, gas chromatography determination of potential nitrogen fi xation activity and potential emissions of N 2 O. Results. The results obtained have demonstrated that the rates of mineral nitrogen, not ex- ceeding 60 kg/ha, can be considered physiologically expedient for winter rye production on sod-podzolic soils. Under the application of microbial preparation Diazobakteryn, there is a higher physiological need of plants for nitrogen, which allows increasing the rates of nitrogen fertilizers up to 90 kg/ha. Conclusions. The orienta- tion of the processes of biological nitrogen transformation in the root zone of plants is a reliable indicator of determining the appropriateness of nitrogen fertilization of crops.

scholarly journals Winter Wheat Straw Decomposition under Different Nitrogen Fertilizers

Agriculture ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 83
Author(s):  
Gabriela Mühlbachová ◽  
Pavel Růžek ◽  
Helena Kusá ◽  
Radek Vavera ◽  
Martin Káš
Keyword(s):  
Winter Wheat ◽  
Wheat Straw ◽  
Soil Surface ◽  
Weather Conditions ◽  
Mineral Nitrogen ◽  
Nitrogen Fertilizers ◽  
Pig Slurry ◽  
Straw Decomposition ◽  
Rainy Weather ◽  
N Fertilisers

The climate changes and increased drought frequency still more frequent in recent periods bring challenges to management with wheat straw remaining in the field after harvest and to its decomposition. The field experiment carried out in 2017–2019 in the Czech Republic aimed to evaluate winter wheat straw decomposition under different organic and mineral nitrogen fertilizing (urea, pig slurry and digestate with and without inhibitors of nitrification (IN)). Treatment Straw 1 with fertilizers was incorporated in soil each year the first day of experiment. The Straw 2 was placed on soil surface at the same day as Straw 1 and incorporated together with fertilizers after 3 weeks. The Straw 1 decomposition in N treatments varied between 25.8–40.1% and in controls between 21.5–33.1% in 2017–2019. The Straw 2 decomposition varied between 26.3–51.3% in N treatments and in controls between 22.4–40.6%. Higher straw decomposition in 2019 was related to more rainy weather. The drought observed mainly in 2018 led to the decrease of straw decomposition and to the highest contents of residual mineral nitrogen in soils. The limited efficiency of N fertilisers on straw decomposition under drought showed a necessity of revision of current strategy of N treatments and reduction of N doses adequately according the actual weather conditions.

Nonpoint sources of pollution in the Morava River basin

1996 ◽  
Vol 33 (4-5) ◽  
pp. 127-135 ◽  
Author(s):  
D. Beránková ◽  
J. Ungerman
Keyword(s):  
River Basin ◽  
Mass Flow ◽  
Quality Parameters ◽  
Mineral Nitrogen ◽  
Nitrogen Fertilizers ◽  
Large Area ◽  
Nonpoint Sources ◽  
Sources Of Pollution ◽  
Morava River ◽  
Morava River Basin

The diversity of natural conditions as well as the industrial and agricultural character of the landscape are responsible for changes influencing the share of point and nonpoint sources of pollution in the Morava River basin. Nonpoint sources of pollution were specified on the basis of data on agriculture, forestry, erosion, suspended solids, water quality parameters, mass flow of nutrients and atmospheric deposition. The relationship between concentrations of nitrates and application rates of mineral nitrogen fertilizers in the lower part of the Morava River basin was significant. In the longitudinal profile of the Morava River concentrations of mineral nitrogen and total phosphorus were specified and mass flow calculated by characteristic discharge. Changes of political system in 1989 in the Czech Republic initiated dynamic development of the state agricultural policy with consequences for the intensity of nonpoint pollution. Mainly in the field of plant and animal production some influences were evidently reduced. Consumption of industrial fertilizers was minimized to 13 of the former level and livestock population was also significantly decreased. Although privatization in agriculture is practicaly finished, there are not many positive changes in the field of large-area land use and structure of plots. The process of soil erosion still causes damages of land and pollution of surface waters.

scholarly journals EFFECT OF BIO-AND MINERAL NITROGEN FERTILIZERS ON GROWTH AND YIELD OF SNAP BEAN GROWN IN SUBSTRATE CULTURE.

2016 ◽  
Vol 2 (2) ◽  
Author(s):  
M. S. A. Emam, Z. El-S Lacheene, M. A. Medany, U. A. El-Beha
Keyword(s):  
Plant Height ◽  
Vegetative Growth ◽  
Nitrogenase Activity ◽  
Total Yield ◽  
Fruit Weight ◽  
Mineral Nitrogen ◽  
Nitrogen Fertilizers ◽  
Growth And Yield ◽  
Rhizobium Inoculation ◽  
Nitrogen Rates

This study was conducted under unheated plastic house condition at Arid Land services and Research Center (ALARC), Faculty of agriculture - Ain Shams University, Egypt, during two successive autumn seasons 2007/2008 and 2008/2009 ability of use to investigate the Rhizobium inoculation as bio-fertilizer to reduce the use of mineral nitrogen fertilizers in the substrate culture and its effect on the growth and yield of Snap bean (phaseolus vulgaris L.) cv. Goya Four different mineral nitrogen rates (25%, 50%, 75% and 100% of 200 ppm) with Rhizobium inoculation compared to 100% mineral N without inoculation also two different types of substrate systems (containers and pots) were in this investigation. The experimental design was split plot with three replicates. Vegetative growth, plant height, chlorophyll reading (spad), total leaves area, early and total yield, chemical analysis of pods, total soluble solids (T.S.S.%), total protein, total nitrogen content, number of nodules and nitrogenase activity were measured.    Data showed that container system had a significant effect on vegetative growth parameters (plant height, chlorophyll reading (spad), and total leave area), and fruit weight (early and total fruit weight). Chemical properties of pods, number of nodules and nitrogenase activity compared to pots system. Control treatment (100% N without inoculation) and (100% N with inoculation) recorded the highest vegetative growth, early and total yield, T.S.S.(%), pod protein and total nitrogen content followed by 50 % N with Rhizobium inoculations. Moreover, data showed that 50% N gave the highest number of nodules and nitrogenase activity. Data showed that there were no significant among controls, 100%, 75% and 50% N combined with container and 100% N combined with pots followed by control combined with pots. Increase nitrogen rates led to increase the values of plant height, chlorophyll reading (spad), early yield and total yield.

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