Wyniki wyszukiwania - AGRO

1

The relationships between nitrogen use efficiency and nitrogen input in crop production in Poland

100%

Faber A., Jarosz Z., Kopinski J., Matyka M.

Polish Journal of Agronomy

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2016

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nr 26

The study attempted to characterize Nitrogen Use Efficiency (NUE), nitrogen yield (Yn), and N balance (Nb = N surplus) depending on the dose of the total N fertilization (F = N dose in mineral fertilizers, natural fertilizers, or N from deposition). The study included basic crops in Poland in the years 1999–2014. The determination of the relationships between Yn, NUE, Nb, depending on F was performed using the elements of the methodology proposed by Lassaletta et al. (2014). The evaluation of differences between the optimal NUE and the NUE obtained in this study was carried out using the lower limits of the optimal NUE = 70–90%, as proposed tentatively by the EU NEP (2014). The study indicates that in the period of 1999–2014, NUE of basic crops in Poland increased, achieving the weighted average value of 55%. This value was significantly decreased by low NUE of permanent grasslands (42%), which have the largest share (20.3%) in the structure of land use in Poland. It would, therefore, be recommendable to increase NUE on grasslands. The omission of permanent grassland in the analysis increased the weighted average NUE for basic crops on arable lands to the value of 60%. There were no differences found in the weighted average NUE values in the case of more intensive (60%) and more extensive (60%) crops. Assuming that there is a need to increase NUE to the lower level of the optimal value (70%), we concluded, on the basis of our results and discussion, that the most effective way to achieve it would be to improve the NUE of more intensive crops, especially of wheat, triticale and barley. These plants achieve higher grain yields, Yn, Ymax, and Yn gap. They also have a larger share in the crop structure in comparison with more extensive crops.

2

Nitrogen and phosphorus loading in Slawno Lake as a result of fish production intensification

100%

Animal Science. Scientific Papers of Agricultural University of Poznan

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2003

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tom 05

3

Results of long-term nutrition trials with increasing intensity of nitrogen nutrition

100%

Ciganek K., Travnik K.

Fragmenta Agronomica

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2005

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tom 22

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nr 1

4

Nitrogen uptake by maize and nitrogen balance in three-course crop rotation

100%

Janza R., Tajnsek A., Ceh-Breznik B., Santavec I.

Fragmenta Agronomica

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2005

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tom 22

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nr 1

5

Effect of N-fertilizing on crop productivity and N-balance in 40 years long fertilization trials

100%

Tomov T., Gorbanov S., Kostadinova S.

Fragmenta Agronomica

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2005

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tom 22

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nr 1

6

Nitrogen surpluses in the Wyskoc Ditch catchment (Poland) in relation to spatial field structure and intensity of agricultural activity

84%

Bienkowski J. F., Jankowiak J., Kedziora A., Dabrowicz R., Holka M.

Electronic Journal of Polish Agricultural Universities. Series Environmental Development

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2013

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tom 16

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nr 3

7

Effect of rice straw in the diet for growing goats on site and extent of digestion and N balance

84%

Zhao X. G., Jiang H. L., Sun Z. H., Tang S. X., Zhou C. S., Cong Z. H., Tayo G. O., Tan Z. L.

Journal of Animal and Feed Sciences

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2007

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tom 16

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nr 3

379-388

8

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Regional variation in changes in agricultural production in Poland in the context of environmental impact

84%

Kopinski J.

Economic and Regional Studies

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2018

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tom 11

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nr 1

Subject and purpose of work: Agricultural production activity brings about specific environmental effects. The aim of the study was to analyse changes in agricultural production in regions of Poland (NUTS-2) in the context of environmental impact using the gross nitrogen balance. Materials and methods: The analysis covered the medium-term perspective of 2001-2016. The primary source of information was statistical data of the Polish Central Statistical Office (Główny Urząd Statystyczny - GUS). Results: During the 2002-2004 period, the balance of gross nitrogen balance in Poland did not change and amounted to an average of 47.5 kg N∙ha-1 UAA (Utilized Agricultural Area). The progressive extensification of plant production in the following provinces: Slaskie, Malopolskie, Podkarpackie and Swietokrzyskie, is accompanied by a rapid reduction in the stocking density of livestock. Conclusions: The nitrogen balance, highly differentiated regionally, just as its individual elements, show the potential differentiation scale of the agricultural impact on the state of the environment. Very high balance surpluses occurring in the Kujawsko-Pomorskie, Lodzkie and Wielkopolskie provinces may indicate high environmental pressure from the agricultural production.

9

Nitrogen gross balance in farms specialised in plant production in selected regions of Poland

84%

Kupiec J., Zdanowska A., Zbierska J., Wozniak A.

Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura

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2011

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tom 66

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nr 1

10

Skeletal muscle wasting occurs in adult rats under chronic treatment with paracetamol when glutathione-dependent detoxification is highly activated

84%

Mast C., Joly C., Savary-Auzeloux I., Remond D., Dardevet D., Papet I.

Journal of Physiology and Pharmacology

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2014

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tom 65

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nr 5

11

Evaluation of protein quality in seeds of some legume varieties

84%

Lubowicki R., Petkov K., Kotlarz A., Jaskowska I.

Roczniki Naukowe Zootechniki

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2000

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tom 27

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nr 4

12

Nutritive value of rolled, medium and finely ground or expanded and enzyme-supplemented triticale for pigs

84%

Flis M., Czarnyszewicz Z., Sobotka W.

Polish Journal of Natural Sciences

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2002

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tom 12

13

A note on the effect of feeding calves on fish-protein-based milk replacer

84%

Sretenovic L.

Journal of Animal and Feed Sciences

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2000

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tom 09

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nr 4

14

The influence of municipal sewage on the nitrogen uptake and its balance in mineral and organic soils

84%

Dechnik I., Kaczor A.

Polish Journal of Soil Science

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1997

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tom 30

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nr 1

15

Physical activity and protein requirement

84%

Keller J. S.

Polish Journal of Food and Nutrition Sciences

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1997

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tom 06

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nr 2

16

Effects of chromium picolinate, L-carnitine and thyroxine on the performance, nutrient digestibility and nitrogen balance in pigs weaned at 21 days of age

84%

Cho W.T.Han I.K., Chae B. J., Han Y. K., Ha J. K., Odle J.

Journal of Animal and Feed Sciences

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2000

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tom 09

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nr 4

17

Effects of mixed feeding schedules on growth performance, body composition, and nitrogen- and phosphorus balance in rainbow trout, Oncorhynchus mykiss

67%

Sevgili H., Emre Y., Kanyilmaz M., Diler I., Hossu B.

Acta Ichthyologica et Piscatoria

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2006

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tom 36

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nr 1

Background. Reducing feed cost and the pollution originating from feed have been principal matters in fish nutrition. Mixed feeding schedules have been proposed as one of the methods to reduce both of them and successfully tested in many fish species. The aim of the present study was to determine the mixed feeding schedules′ suitability for culture of rainbow trout. Materials and Methods. Five different feeding schedules were tried by alternating the presentation of a low-protein (28.1%) diet (A) and a high-protein (49.9%) diet (B). The feeding schedules employed were 1A/1B, 1A/2B, 1A/3B, 2A/2B, and 2A/3B where the numerical values refer to the number of days each diet (A and B) was offered continuously. Fish given diets A and B continuously served as controls. Totally, seven dietary treatments were tested in triplicate for 10 weeks. Results. The fish maintained on the different mixed feeding schedules exhibited lower weight gain than those fed continuously on the high-protein diet (P < 0.05). The fish reared on schedule 1A/3B (1 day diet A alternated with 3 days diet B) had similar specific growth rate (SGR), feed conversation ratio (FCR), and protein efficiency ratio (PER) to those fed diet B continuously and was best among all mixed feeding schedules. However, the most cost-effective treatment was 2A/2B. In addition, this group compared to B resulted in significant increase and reduction of phosphorus retention and discharge, respectively (P < 0.05). The treatments significantly effected body moisture, fat- and ash levels (P < 0.05), but not protein. Conclusion. The study shows that mixed feeding schedules are promising for use in rainbow trout culture as they result in feed cost saving and reduced phosphorus discharge in the effluents.

18

Strawnosc skladnikow pokarmowych i retencja azotu u lisow polarnych zywionych pasza z udzialem ekstrudowanej sruty jeczmiennej

67%

Lorek M. O., Gugolek A., Gawarecka B.

Acta Academiae Agriculturae ac Technicae Olstenensis. Zootechnica

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1994

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tom 41

37-45

Celem badań było określenie strawności składników pokarmowych i retencji azotu u lisów polarnych żywionych paszą z udziałem ekstrudowanej śruty jęczmiennej. Materiał doświadczalny stanowiło 15 szt. lisów polarnych w wieku 3.5 miesiąca podzielonych losowo na trzy grupy. Zwierzęta grupy I żywiono paszą z udziałem śruty jęczmiennej parowanej, w ilości 30% dawki. W dawce pokarmowej dla grupy II śrutę parowaną zastąpiono śrutą ekstrudowaną, natomiast w grupie III śrutą ekstrudowaną i natłuszczaną tłuszczem zwierzęcym. Stwierdzono lepsze wykorzystanie składników pokarmowych i energii dawki w grupie zwierząt żywionych paszą z udziałem natłuszczanego ekstrudatu śruty jęczmiennej.

19

Isotopic evaluations of dynamic and plant uptake of N in soil amended with 15N-labelled sewage sludge

67%

Kchaou R., Khelil M. N., Gharbi F., Rejeb S., Henchi B., Hernandez T., Destain J. P.

Polish Journal of Environmental Studies

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2010

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tom 19

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nr 2

363-370

Field experiments were conducted to evaluate the use of a novel ¹⁵N isotope technique for comparing the dynamics of N derived from sewage sludge applied to sorghum to the dynamics of N derived from the commercial fertilizer, urea. The treatments included a control, sludge applied at three rates (3, 6 and 9 t/ha, or 113, 226 and 338 kg N/ha) and N-urea applied at three rates (150, 250 and 350 kg N/ha). Recovery of ¹⁵N-labelled sludge was similar for the different nitrogen rates applied, with a mean value of 27%. However, the recovery of ¹⁵N-urea decreased as the rate of N application increased (from 38% to 27%). Approximately 22% and 19% of the ¹⁵N from sludge and urea, respectively, remained in the 0-60 cm layer of soil, most of which was present in the 0-20 cm layer. Furthermore, losses of ¹⁵N-labelled fertilizer were not affected by the N fertilization source, and the greatest losses, which were measured in response to the highest N application rate, were 59%.

20

The effect of breed and dietary level of avocado fat on the N and energy balance in young pigs

67%

Grageola F., Sangines L., Diaz C., Gomez A., Cervantes M., Lemus C., Ly J.

Journal of Animal and Feed Sciences

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2010

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tom 19

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nr 1

37-48

The effect of breed and dietary avocado level on the total apparent digestibility (RAD) and balance of nitrogen (N) energy, in young pigs, was studied. Four Pelón Mexicano (PM) and four Yorkshire × Landrace (Y×L) barrow male pigs (39.2 kg average inital liveweight) distributed in two groups according to a change over design in a 2×2 factorial arrangement (breed and diet) were used. The pigs received on a pair feeding basis (0.10 kg DM/kg W0.75 per day), the experimental diets. The diets were formulated to contain 30 or 150 g crude fat by partial replacement of the maize/soyabean meal diet by avocado (Persea americana Mill.) fresh pulp. The RAD of crude fat was 73.8 and 71.5% and that of N was 83.4 and 82.8 % in PM and Y×L pigs, respectively. There was no significant effect (P>0.10) of crude fat level on RAD of N and energy. N and energy balance significantly (P<0.05) favoured Y×L as compared with PM pigs. In conclusion, the poor N retention of PM pigs could be related to body composition of this local, non improved genotype. The use of avocado for feeding pigs, PM included, should determine a high digestibility of the crude fat fraction and at the same time a considerable deterioration of N retention, probably due to an unbalanced composition of amino acids. The level of avocado pulp inclusion in the diet of the pig should be involved in these circumstances.

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