Temat: Nitrogen - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Fluxes of nitrogen within deciduous fruit trees
Przepływy azotu wewnątrz drzew owocowych klimatu umiarkowanego
Autorzy:: Tagliavini, M.
Millard, P.
Powiązania:: https://bibliotekanauki.pl/articles/11364496.pdf
Data publikacji:: 2005
Wydawca:: Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:: nitrogen remobilization
nitrogen nutrition
nitrogen flux
shoot-root-shoot nitrogen recycling
fruit tree
nitrogen storage
fruiting
growth
Opis:: Nitrogen (N) nutrition is a major means of controlling growth and fruiting of trees. In EU Countries, society’s expectations and political decisions have pushed for the adoption of sustainable ways to manage orchards. Guidelines for N management aim to limit fertiliser applications under threshold limits, in order to reduce N losses. Increasing the effectiveness of the recycling of the N present in the orchard is a basic step to reduce external N inputs. The availability of the stable isotope ¹⁵N as experimental tool has made possible significant advances in the knowledge of the fluxes of N at tree and orchard level. This paper discusses the N fluxes occurring within the tree both between the years and within the year (root-shoot-root N recycle) and their role in the vegetative and reproductive cycle of fruit trees.
Odżywianie azotem (N) stanowi główny czynnik kontrolujący wzrost i owocowanie drzew. W krajach UE oczekiwania społeczeństwa i decyzje polityczne wymuszają przyjęcie odnawialnych sposobów prowadzenia sadów. Wskazania odnośnie gospodarki azotem są nakierowane na zastosowanie nawozów w progowych dawkach, w celu zredukowania strat N. Wzrost efektywności obiegu N obecnego w sadzie stanowi podstawowy krok w kierunku ograniczenia zewnętrznego wkładu. Zastosowania izotopu ¹⁵N jako narzędzia doświadczalnego umożliwiło znaczny postęp w poznaniu przepływów azotu w obrębie drzew i w ogóle w sadzie. W pracy dyskutowane są przepływy N wewnątrz drzewa – pomiędzy latami i w obrębie roku (obieg korzenie–pędy–korzenie) oraz ich znaczenie dla cykli wzrostowych i reprodukcyjnych drzew owocowych.
Źródło:: Acta Scientiarum Polonorum. Hortorum Cultus; 2005, 04, 1; 21-30
1644-0692
Pojawia się w:: Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Review on Nitrogen: Forms, Functions and Effects on Potato Growth Performance
Autorzy:: Bewket, Bewket
Powiązania:: https://bibliotekanauki.pl/articles/1177698.pdf
Data publikacji:: 2018
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Function
Growth
Nitrogen
Nitrogen loses
Potato
Opis:: Nitrogen has greater influence on growth and yield of crop plants than any other essential plant nutrient. Nitrogen is usually the element that is of primary importance in the determination of crop yields and quality. Potato is a sensitive crop to application management of nitrogen and amounts less or more than its requirements. The main objective of this review was to assess the forms, functions and effects in plant growth (in case of potato). Original source of nitrogen is atmosphere it is also found in soil pore spaces as dinitrogen gas and both organic and inorganic forms in the soil. Nitrogen commonly loses through leaching, volatilization, crop removal, denitrification, soil erosion and runoff. Biological fixation and commercial production are main sources of nitrogen and shortage of nitrogen shows different symptoms on different morphological parts and low nutrient content on tissues and grains (tubers) of crops. Generally nitrogen is one of essential nutrient for complete life cycle of plants. It is the first most important nutrient required relatively in large amounts by plants while soils generally contain relatively small amounts of this element.
Źródło:: World Scientific News; 2018, 101; 44-54
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The Impact of Pond on Water Quality in the Čermná Stream
Autorzy:: Hubačíková, V.
Oppeltová, P.
Powiązania:: https://bibliotekanauki.pl/articles/952354.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: ammonia nitrogen
nitrate nitrogen
nitrite nitrogen
concentration
waste water
Opis:: The aim of this study is to demonstrate the positive impact of ponds on water quality in a small stream Čermná. Four sites were sampled regularly every month for one year. Simultaneously, pH and temperature were measured continuously. The concentration of ammonia nitrogen, nitrate nitrogen and nitrite nitrogen were determined by subsequent analysis of the water samples. The results were classified in compliance with Government Decree (GD) No. 401/2015 Coll., as amended, and Czech standard ČSN 75 7221. High concentrations of ammonia nitrogen that were detected during the whole period are the result of the discharge of all wastewater from the village of Dolní Čermná to flow Čermná. Although the results showed a positive effect pond Čermenský, during the growing season the concentration of ammonia nitrogen at SP No. 2 placed under the pond increased mainly due to fertilizing pond by manure to increase nutrients for the fish population in the pond.
Źródło:: Journal of Ecological Engineering; 2017, 18, 1; 42-47
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Content of various forms of nitrogen and absorption of this element by cocksfoot grass, depending on meteorological conditions
Zawartosc roznych form azotu oraz pobranie tego skladnika przez kupkowke pospolita w zaleznosci od przebiegu warunkow meteorologicznych
Autorzy:: Bednarek, W
Bednarek, H.
Dresler, S.
Powiązania:: https://bibliotekanauki.pl/articles/15619.pdf
Data publikacji:: 2009
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: nitrogen form
nitrogen uptake
nitrogen content
cocksfoot
grass
meteorological condition
Opis:: The dependence of the content of various forms of nitrogen and absorption of N by cocksfoot grass on meteorological conditions was established in a field experiment. Correlations between the content of total nitrogen, protein nitrogen, N-NH4, and N-NO3 in sward and roots of cocksfoot grass and some meteorological elements, i.e. maximum temperature, minimum temperature, average daily temperature measured at 5 and 200 cm, air relative humidity, cloud cover, sum of precipitation, sum of evaporation and soil temperature measured at a depth of 2, 5, 10, 20 cm were analyzed. Correlation coefficients between the forms of nitrogen in the plant and the above meteorological elements were calculated, as well as multiple regression equations, multiple correlation coefficients and determination coefficients. No significant relationship between the forms of N (Ntotal, Nprotein, N-NH4, N-NO3) in sward and roots of cocksfoot grass and the course of meteorological conditions was clearly stated. The relationship between the content of N-NH4 in sward and Ntotal and N-NO3 in roots, and certain meteorological elements is relatively small and can be characterized by the value of determination coefficients, i.e. 0.166, 0.106 and 0.151, respectively. According to the statistical analysis, the absorption of nitrogen by cocksfoot grass depends to a relatively small though significant extent (R2=0.249) on certain meteorological elements. However, further research is still recommended.
Na podstawie wyników ze ścisłego doświadczenia polowego określono zależność zawartości różnych form azotu oraz pobranie N przez kupkówkę pospolitą od przebiegu warunków meteorologicznych. Rozpatrywano korelacje między zawartością azotu ogółem, azotu białkowego, N-NH4 i N-NO3 w runi i korzeniach kupkówki a niektórymi elementami meteorologicznymi: temperaturą powietrza maksymalną, minimalną, średnią dobową mierzoną na wysokości 5 i 200 cm, wilgotnością względną powietrza, zachmurzeniem, sumą opadu atmosferycznego, sumą parowania i temperaturą gleby mierzoną na głębokości 2, 5, 10, 20 cm. Obliczono współczynniki korelacji między formami azotu w roślinie a przebiegiem wymienionych elementów meteorologicznych oraz równania regresji wielokrotnej, współczynniki korelacji wielokrotnej i determinacji. Nie stwierdzono jednoznacznie, że istniała istotna zależność zawartości form azotu (Nog., Nbiał., N-NH4, N-NO3) w runi i korzeniach kupkówki pospolitej od przebiegu warunków meteorologicznych. Zależność, która wystąpiła między zawartością N-NH4 w runi oraz Nog. i N-NO3 w korzeniach a niektórymi elementami meteorologicznymi, jest stosunkowo niewielka i można ją scharakteryzować wielkością współczynników determinacji, kolejno: 0,166; 0,106 i 0,151. Pobranie azotu przez kupkówkę pospolitą zależało w stosunkowo niewielkim, lecz istotnym, stopniu (R2=0,249) od przebiegu niektórych elementów meteorologicznych. Wskazują na to rezultaty obliczeń statystycznych; nieodzowne jest kontynuowanie prac dotyczących omawianych zagadnień.
Źródło:: Journal of Elementology; 2009, 14, 2; 207-216
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: The effect of fertilization with sulphur on uptake and utilization of nitrogen by winter wheat
Autorzy:: Winiarski, Ryszard
Ochal, Piotr
Powiązania:: https://bibliotekanauki.pl/articles/2147734.pdf
Data publikacji:: 2021-09-30
Wydawca:: Instytut Uprawy Nawożenia i Gleboznawstwa – Państwowy Instytut Badawczy
Tematy:: nitrogen doses
sulphur fertilization
nitrogen uptake
efficiency of nitrogen utilization
Opis:: This paper presents the results of a four-year field study on the effect of sulphur fertilization on nitrogen uptake and its utilization efficiency by winter wheat. A two-factor field ex- periment was carried out over 1999–2002 in a randomized blocks design. The first factor was fertilization with sulphur (in the form of sulphate) in doses of 0 and 60 kg ha-1, while the second fac- tor – nitrogen fertilization (in the form of ammonium nitrate) in doses of 0, 30, 60, 90, 120 and 150 kg N ha-1. Nitrogen was ap- plied in doses of 30 kg N ha-1, at two-week intervals after the start of growing season. The research showed that sulphur fertiliza- tion increased on average the nitrogen uptake by wheat by 3.5%. The efficiency index of nitrogen fertilization of wheat had higher values after application of fertilizers containing sulphur with a tendency to decrease as the dose N increased. Sulphur fertiliza- tion increased the agronomic efficiency of nitrogen in the range of low doses from 30 to 90 kg N ha-1.
Źródło:: Polish Journal of Agronomy; 2021, 46; 31-37
2081-2787
Pojawia się w:: Polish Journal of Agronomy
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Dynamics of Nitrogen and Phosphorus Forms Content in Dojlidy Retention Reservoir
Autorzy:: Oszczapińska, K.
Skoczko, I.
Szczykowska, J.
Powiązania:: https://bibliotekanauki.pl/articles/123705.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: water pollution
nitrate nitrogen
ammonia nitrogen
phosphates
Opis:: The Dojlidy Ponds, which include Dojlidy water dam, are located within Bialystok city limits in Podlasie area, Poland. The reservoir with a water surface of 34 ha and average depth of 1.75 m was constructed in 1962 as a result of Biala River damming. The researches were conducted in July, October and December 2014 as well as in March 2015. Each time five test samples were collected from spots located along the reservoir. Water samples were tested for the presence of ammonia nitrogen, nitrite nitrogen, organic nitrogen, phosphates and organic phosphorus. The values of nutrient indicators exhibited high variability during the study period. The highest concentration of nitrite and nitrate nitrogen were observed in July, while the lowest in October – nitrite nitrogen, and in December – nitrate nitrogen. Different situation was observed after the analysis of phosphorus forms – the highest concentrations of organic phosphorus and phosphates were observed in December and the lowest in July. Relatively high concentrations of nitrogen and phosphorus forms identified in water samples were most likely caused by tributaries, due to the pollution from the reservoir catchment. Technical parameters of the object and location of the reservoir have undoubtedly an impact on the tested parameters contents.
Źródło:: Journal of Ecological Engineering; 2017, 18, 1; 147-153
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Dynamics of the Content of Mineral Forms of Nitrogen in the Water of Small Rivers in Khabarovsk during the Winter Period
Autorzy:: Shesterkin, Vladimir Pavlovich
Sinkova, Irina Sergeevna
Kaminsky, Oleg Igorevich
Powiązania:: https://bibliotekanauki.pl/articles/2027768.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: water
small river
Khabarovsk
pollution
nitrite nitrogen
nitrate nitrogen
ammonium nitrogen
Opis:: This work is devoted to the study of the content of mineral forms of nitrogen in the water of small rivers in Khabarovsk and its surroundings, represented by the Bolshekhekhtsirsky Nature Reserve, during the winter low water of 2017-2021, which lasts from December to February. The dynamics of quantitative distribution of ammonium, nitrite, and nitrate nitrogen in relation to different groups of watercourses were considered. The correlation analysis enabled to reveal the probable reasons for such correlations of their content.
Źródło:: Journal of Ecological Engineering; 2021, 22, 10; 121-126
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Mechanism of the oxidation of nitric oxide with oxygen
Autorzy:: Głowiński, Józef
Hoffmann, Józef
Wilk, Marcin
Powiązania:: https://bibliotekanauki.pl/articles/1849326.pdf
Data publikacji:: 2021
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: nitrogen monoxide
oxygen
mechanism
kinetic
equilibrium
nitrogen trioxide
Opis:: Very fast reactions of forming higher nitrogen oxides set out an equilibrium framework for the course of the reaction of nitrogen monoxide oxidation. The slow course of reaction of nitrogen monoxide with oxygen permanently violates the created equilibria. In particular, the equilibrium of the oxidation reaction of nitrogen monoxide with nitrogen dioxide. The contribution of this reaction to the transformation of nitrogen monoxide in the conditions of nitrogen trioxide removal from the gas phase was estimated.
Źródło:: Polish Journal of Chemical Technology; 2021, 23, 1; 31-36
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Increasing nitrogen use efficiency with lower nitrogen application frequencies using zeolite in rice paddy fields
Autorzy:: Wu, Q.
Chen, T.
Chi, D.
Xia, G.
Sun, Y.
Song, Y.
Powiązania:: https://bibliotekanauki.pl/articles/2082479.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:: available nitrogen
nitrogen uptake
root system
labour force
Opis:: Zeolite can effectively regulate the nutrient status in the root zone of crops, thereby increasing nitrogen utilization. However, there has been relatively little research conducted concerning a possible reduction in the frequency of nitrogen application due to the sustained-release properties of zeolite. In this study, 157.5 kg ha-1 nitrogen in the form of urea fertilizer was applied at the same rate, either as a one-time application or as a 3-way split application with and without 10 t ha-1 zeolite. The effects on rice yield, nitrogen uptake, root morphology and soil properties were evaluated in 2014 and 2015. Results showed that zeolite could enhance the biomass, leaf area index and nitrogen uptake. A higher rice grain yield and nitrogen uptake following soil treatment with zeolite could be attributed to a higher soil cation exchange capacity as well as nitrogen and potassium availability in the soil especially during the vegetative period of the rice plant. The addition of nitrogen to the soil as a one-time application or 3-way split application with 10 t ha-1 zeolite significantly increased rice grain yield by 8.5 or 10.7% compared with nitrogen as a one-time application without zeolite. Zeolite addition greatly improved the development of root morphology and activity compared with treatments without zeolite, which contributed to additional plant growth. The addition of nitrogen to the soil with 10 t ha-1 zeolite as a one-time application that can significantly increase nutrient retention is recommended to improve rice grain yield and decrease nitrogen application frequencies in order to lower both labour forces and energy requirements.
Źródło:: International Agrophysics; 2019, 33, 2; 263-269
0236-8722
Pojawia się w:: International Agrophysics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Productivity, nitrogen use efficiency and water use efficiency of maize for grain in long term field experiments
Autorzy:: Rutkowska, Agnieszka
Powiązania:: https://bibliotekanauki.pl/articles/2148504.pdf
Data publikacji:: 2019-06-30
Wydawca:: Instytut Uprawy Nawożenia i Gleboznawstwa – Państwowy Instytut Badawczy
Tematy:: Zea mays
nitrogen rates
Nitrogen Use Efficiency (NUE)
Water Use Efficiency (WUE)
nitrogen surplus
Opis:: 11Abstract. Maize, one of the most important cereals species grown in Poland, use large quantities of nitrogen, but water defi-cit through the vegetation period might lead to yield reduction and diminish nitrogen uptake. The aim of the study was to char-acterize the productivity of the crop, depending on its nitrogen and water use efficiency. In two locations, in Western and Eastern Poland, eleven-year field experiments with maize grown for grain were conducted. Maize was fertilized with increasing rates of ni-trogen: 50, 100, 150, 200 i 250 kg N ha-1. It was found, that grain yields of maize raised statistically significant up to 8.03 tha-1 under 150 kg Nha-1. Such a dose guaranteed: nitrogen uptake 182 kg Nha-1, nitrogen use efficiency 121%, nitrogen surplus -32 kg Nha-1, water use efficiency 14.5 kgha-1 mm-1, and nitro-gen utilization efficiency 43 kgkg-1. Increasing nitrogen doses over the years was not justified because maize productivity was limited by water availability under higher nitrogen rates.
Źródło:: Polish Journal of Agronomy; 2019, 37; 11-15
2081-2787
Pojawia się w:: Polish Journal of Agronomy
Dostawca treści:: Biblioteka Nauki

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