Wyniki wyszukiwania

1

Experiences with the determination of nitrogen by 0,01 M CaCl2 extractant in Hungarian soils and long-term experiments

100%

Bertane Szabo E., Loch J., Pirko B.

Nawozy i Nawożenie

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2009

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nr 37

2

The phosphorus in Czech agriculture

100%

Budnakova M., Cermak P., Ciganek K., Travnik K.

Nawozy i Nawożenie

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2002

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tom 04

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nr 4[13]

3

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

4

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

5

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Variation in growth and survival among European provenances of Pinus sylvestris in a 30-year-old experiment

84%

Barzdajn W., Kowalkowski W., Chmura D. J.

Dendrobiology

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2016

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tom 75

Provenance trials with forest trees provide valuable information about growth and adaptability of populations often transferred over large geographical and climatic distances. In this study we evaluated growth and survival of 19 Scots pine (Pinus sylvestris L.) populations representing most of the natural range of the species in Europe, growing in a 30-year-old provenance trial in the northeastern Poland. We used cluster analysis to investigate differentiation among those populations in growth and survival. We also used published data on needle morphology and allozyme and DNA marker variation for those same populations to compare groupings of populations based on growth and needle traits and markers. We found significant variation among tested populations in all investigated traits – the largest variation was found for stand volume which integrates information on growth and survival. Variation in growth traits was related to the latitude of population origin with populations from the latitudinal band between 49° N and 54° N showing the best performance. Populations originating from both north and south off of that region showed lower productivity, which for southern provenances resulted from their particularly low survival, reflecting the lack of adaptation to the environment of the research site. Grouping of populations based on growth traits revealed three clusters corresponding to the three latitudinal regions – northern, central and southern. Needle morphological traits were not appropriate as markers of productivity. Clustering of populations based on needle morphology, and especially based on biochemical and molecular markers, did not correspond to the grouping based on growth traits.

6

Application of the Nmin soil test in fertilizer recommendations

84%

Gaborik S.

Nawozy i Nawożenie

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2009

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nr 37

7

Soil acidification and the mobilisation of toxic metals caused by acid deposition and fertiliser application

84%

Goulding K. W. T., Blake L.

Zeszyty Problemowe Postępów Nauk Rolniczych

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1998

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tom 456

The Classical and other long-term experiments at Rothamsted Experimental Station illustrate the causes and effects of soil acidification. One hundred and fifty years of precipitation measurements show how atmospheric deposition has increased, causing acidification of grassland and woodland soils. Where applied, ammonium fertilisers cause very rapid acidification unless their effects are offset by the application of lime. Acidification causes the mobilisation and removal by leaching of base cations to be replaced by aluminium, manganese or iron, the reduction of base saturation and, in the long-term, the reduction of cation exchange capacity by the weathering of clay minerals. Mobilised toxic metals are taken up by vegetation growing on the acidified soils. Some plots of the Park Grass Experiment have acidified to sufficiently to cause the release of aluminium to be taken up in hay in amounts toxic to cattle - a Chemical Time Bomb.

8

Content of available magnesium, phosphorus and potassium forms in soil exposed to varied crop rotation and fertilisation

84%

Kondratowicz-Maciejewska K., Kobierski M.

Journal of Elementology

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2011

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tom 16

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nr 4

Soil richness in available magnesium, phosphorus and potassium forms is one of the key factors of fertility, which ensures the potential of soil for satisfying nutritional requirements of plants. The aim of the present research has been to determine the effect of crop rotation and varied mineral and organic fertilisation on the content of available Mg, K and P forms. Soil was sampled from a long-term experiment, carried out on Luvisol formed from sandy loam (soil valuation class IVa, very good rye complex). The experiment was performed in a 3-factor design, which included two types of crop rotation as well as FYM and nitrogen fertilisation. Basic physicochemical properties of soil were determined. The content of available forms of magnesium was defined with Schachtschabel method and the content of potassium and phosphorus – with Egner-Riehm method (DL). The reaction in the arable-humus horizon of the soils ranged from 4.7 to 6.2. It was found that the Corg to Nt ratio in the arable-humus horizon of soils of all the experiment variants was typical of biologically active soils. The content of available magnesium ranged from 27.8 to 58.3 mg kg–1 of soil, while its water-soluble forms varied from 3.5 to 6.8 mg kg–1 of soil. The highest content of magnesium, potassium and phosphorus forms available to plants was observed after the application of FYM in the doses of 60 and 80 t ha–1 combined with mineral nitrogen fertilisation, in both crop rotation regimes. The content of magnesium and phosphorus forms available to plants was significantly positively correlated with the content of organic carbon. Soil sampled from those plots demonstrated higher classes of the content of that element. The research data proved that the analysed soils showed moderate and high richness in nutrients available to plants. High doses of organic and mineral fertilisation, however, did not increase significantly the electrolytic conductivity of the soil solution.

9

Effect of long-term various mineral fertilization and liming on the content of manganese, nickel and iron in soil and meadow sward

84%

Gondek K., Kopec M.

Journal of Elementology

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2008

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tom 13

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nr 1

Research on grasslands is conducted to assess the yielding potential and determine changes of sward quality depending on applied fertilization. Therefore, the present study was undertaken to assess the contents of manganese, nickel and iron in soil and meadow sward shaped under the influence of diversified mineral fertilization and liming. The experiment is established in the village Czarny Potok near Krynica, about 720 m above sea level., at the foot of Mount Jaworzyna Krynicka. The experiment was set up in 1968 on a natural mountain meadow of mat-grass (Nardus stricta L.) and red fescue (Festuca rubra L.) type with a large share of dicotyledonous plants. Total content of manganese, nickel and iron was determined in the plant and soil material after sample mineralization in a muffle furnace. The studied were extracted with 0.025 mol·dm-3 NH4EDTA solution and the content of Mn, Ni and Fe in the solutions was assessed with the ICP-AES method. The content of total forms of manganese was higher in the soil of the limed series. The soil reaction significantly affected amounts of this element extracted with NH4EDTA solution. Soil liming limited manganese bioavailability and improved the forage value of the analyzed biomass. Small quantities of nickel bound to the soil organic substance were found in the analyzed soil, which suggested considerable mobility of this elements and its translocation into deeper levels of the soil profile, beyond the reach of the plant root system. Liming increased the content of iron forms in combinations with the soil organic substance. Iron deficiency in the meadow sward may have a physiological basis such as difficult iron transport from the root system to aerial plant parts, but it was not caused by limited iron uptake from soil.

10

Przyszłość monokultur w rolnictwie europejskim

67%

Blecharczyk A., Pudelko J.

Acta Academiae Agriculturae ac Technicae Olstenensis. Agricultura

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1997

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tom 64

143-155

W artykule przedstawiono przegląd bieżących badań prowadzonych w krajach europejskich nad możliwością stosowania skrajnych uproszczeń następstwa roślin jakimi są monokultury, uzupełnionych o wyniki badań prowadzonych w innych regionach świata oraz w Polsce z uwzględnieniem badań własnych. Omówiono czynniki przemawiające za i przeciw systemom monokulturowym, W szerszym aspekcie rozważono również rolę najstarszych doświadczeń wieloletnich z uprawą roślin w monokulturze.

11

Choroby grzybowe traw w 29. roku doswiadczenia nawozowego mineralnego na lace gorskiej

67%

Nadolnik M., Dluzniewska J., Jaworska M., Glen K., Mazur K.

Progress in Plant Protection

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1997

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tom 37

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nr 2

273-275

12

Dynamics of the pH of limed and unlimed soil on the background of mineralization of nitrogen compounds in long-term meadow experiments

67%

Sapek B.

Zeszyty Problemowe Postępów Nauk Rolniczych

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1998

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tom 456

On the basis of the results of 13 year strict summer experiments on the dynamics of pH of soils which were unlimed (acidification) or limed (reacidification) on permanent grassland on two different mineral soils three phases differing in the average rate of pH change (∆pH/year) are presented. Phase III (about 10 years after liming) had the fastest changes. The rate of reacidification exceeded the reate of acidification. The increased efficiency of nitrogen compounds mineralization nitrification was accompanied by an increase in the rate of pH changes.

13

Content of the total and mineral nitrogen in three soil horizons and plant yields in long-term experiments

67%

Stepien W., Mercik S.

Polish Journal of Soil Science

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2009

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tom 42

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nr 1

89-95

The effects of nitrogen from mineral fertilizers and from manure on the yield of rye and potatoes, as well as the content of the total and mineral nitrogen in soil horizons up to 65 cm, were studied for 3 years. The study results were obtained from fields where rye and potatoes had been cultivated in monocultures from 1923 and from fields on which these plants were cultivated in rotation without manure and without a papilionaceous plant. Combinations of CaPK or PK non-fertilized with nitrogen, CaNPK or NPK fertilized with this component and fertilized with manure applied every year or every 4 years with CaNPK were used for the studies. In the case of similar amounts of N, P, K introduced to soils with manure and mineral fertilizers, greater yield was obtained and better recovery of nitrogen by the plants was observed while using mineral fertilizers. As a result of using sole manure, much more total nitrogen was obtained in all soil layers than in the case of mineral fertilizers. Sections with manure also included greater amounts of mineral nitrogen than the ones with mineral fertilizers, but only in the Ap and Bt horizon.

14

Relationship between yielding of pea (Pisum sativum L.) and meteorological factors at selected experimental stations in northern and eastern Poland

67%

Grabowska K., Dymerska A., Banaszkiewicz B., Cymes I.

Acta Agrophysica

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2013

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tom 20

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nr 2

Analysis of the effect of meteorological factors on the yielding of pea cv. Fidelia was conducted for the period of 1986-2005. The source material concerning the yields and the weather conditions originated from three experimental and meteorological stations situated in northern and eastern Poland. In the study the method of multiple regressions was applied, with the use of linear and quadratic functions with stepwise selection of variables, and the created regression equations were evaluated by means of the coefficient of determination R2, adjusted R2 adj and the Cross Validation procedure – R2 pred, as well as the F-Snedecor test. In the years of the study notable variation was observed in the weather factors in the individual stages of growth of pea, which had a significant effect on the times of their beginning, on the duration of the growth stages, and on the level of yields. The effect of the meteorological factors studied, i.e. solar radiation, air temperature and atmospheric precipitations on the yielding of the pea cultivar was related to the location of the station, stage of advancement of vegetation, and on the set of variables adopted for the analyses.

15

The most important soil properties and yields of plants in 80 years of static fertilizing experiments in Skierniewice

67%

Mercik S., Stepien W.

Fragmenta Agronomica

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2005

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tom 22

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nr 1

16

Balance of heavy metals [Cd, Ni, Pb] in static fertiliser experiments on grasslands

67%

Curylo T.

Acta Agrophysica

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2001

|

tom 51

On the basis of results obtained in 2 static experiments conducted on light and heavy soils with differentiated mineral fertilisation, an approximate balance of Cd, Ni and Pb was determined over 20 years of investigations. The experiments included 3 levels of fertilisers and the control plot. Ammonium nitrate, single or triple superhosphate and potassium salt were used for the treatments. Average amounts ofheavy metals introduced with the fertilisers in both experiments over twenty years were as follows: 37-110 g Cd, 63-195 g Ni and 62-202 g Pb ha-1. The balance ofheavy metals over twenty years assumed different values depending on the fertilisation level and soil conditions. However, irrespective of those factors, the balance assumes a negative value. The effect of nitrogen doses on the balance was slight and depended on the site trophicity. On the other hand, increasing doses of phosphorus and potassium treatment decreased the value of the negative balance difference of cadmium and, to a lesser degree, of nickel, but increased the lead balance.

17

Study of the pH variability in permanent meadow soils resulting from nitrogen fertilization and after-effect of liming

67%

Sapek B.

Acta Agrophysica

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2000

|

tom 35

Investigations on the acidification dynamics of grassland soil not limed (acidification) and renewed acidification after soil liming ( reacidification) related to ammonium nitrate (AN) and calcium nitrate (CN) fertilisation in three long-term grassland experiments (started in 1981) have been performed. The experiments were set up in randomised blocks in 4 repetitions in 1981, and were localised in the Mazowieckie voivodeship. The soils under the experiments differed in their physical and chemical properties. Lime (CaCO3) was used once directly on the sward, at the beginning of the experiments in doses related to hydrolytic acidity levels 1 Hh and 2 Hh. Two doses of nitrogen (N1 - 120, N2 - 240 kg/ha) in the AN form, and since spring 1992 in CN form were used. Phosphorus and potassium were applied at constant doses. The pHKCl level of each 5 cm soil layer down to 25 cm depth from cach fertilising treatment was measured. The recognition of specific dynamic of acidification and reaciditleation in the separate 5 cm layers, on the background of different soil properties, doses and forms of nitrogen fertilisers can be helpful in characterising the N transformation processes as well as nutrient consumption by the herbage, the roots mass of which is contained mostly in 0-15 cm upper soil layer.

18

Influence of salinity on growth and organic compounds content of carrot (Daucus carota L.)

59%

Shiyab S., Al-Qarallah B., Akash M.

Acta Scientiarum Polonorum. Hortorum Cultus

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2019

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tom 18

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nr 6

Carrot production of valuable carotenes, carbohydrate and protein are hindered by elevated salinity levels in many parts of the world. To assess this problem, germination and growth of two carrot cultivars (Daucus carota cvs Jordan and Napoli) were studied in vivo and in vitro under different salt stress concentrations (0, 75, and 150 mM NaCl). Seeds were directly or gradually exposed to these salt concentrations. With elevated salinity levels, significant reductions in growth parameters (dry shoot weight, fresh shoot weight, shoot length, root length, and root number) were observed. Also, significant difference in germination percentage was observed at 150 mM NaCl in both cultivars when compared with control treatment (90% germination percentage in Napoli and 71% in Jordan cultivar). Growth rate, tolerant index, and relative water content (RWC) declined as salinity increased. The 150 mM NaCl salinity treatment significantly reduced the shoot chlorophyll and protein content, but increased carbohydrate content. Lesser impairment by the gradual exposure of seedling to salinity provides an opportunity to study the acquirement of salt tolerance.

19

Fosfor w sianie laki gorskiej w warunkach dlugotrwalego, statycznego doswiadczenia nawozowego

59%

Kopec M., Mazur K.

Acta Agraria et Silvestria. Series Agraria

|

1996

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tom 34

67-77

In this paper the following problems are presented: changes of phosphorus content in the sward shaped by long-term, differentiated fertilization (1968-1992), quantities and rates of phosphorus uptaking with yield, utilization of phosphorus from the fertilizer and changes in fodder quality resulting from ratio of phosphorus to other macroelements. Systematic fertilization with P increases soil abidance in this element and as a consequence of this causes an increase of P in the sward. The effect of liming on P content in the meadow- sward and in the soil was not observed. Utilization of P from the fertilizer by the meadow sward during the period of 25 years depends mainly oil crop yields and with NPK fertilization amounts from 46% for 90 kg N/ha to 60% for 180 kg N/ha. The decrease in food value of mountain sward stated by ratio of P to other elements was confirmed during 25 years of the experiment. The highest changes of P content in soil were observed in the first years of the experiment.

20

Wpływ przedplonu i nawożenia na zdrowotność pszenżyta ozimego w doświadczeniu wieloletnim

43%

Malecka I., Blecharczyk A., Sawinska Z., Hagedorn M.

Progress in Plant Protection

|

2010

|

tom 50

|

nr 2

A field experiment was conducted in 2007–2008 at the Brody Experimental Station of Poznań University of Life Sciences. The aim of this study was to determine leaf and stem base disease severity on winter triticale as an effect by cropping systems and fertilization. Pseudocercosporella herpotrichoides, Fusarium spp. and Gaeumannomyces graminis occurring on stem bases and roots were found in winter triticale. The incidence of stem base and root diseases was shown to increase under monoculture in comparison with crop rotation. Stem base and root diseases severity was lower after farmyard manure and NPK + Ca application than after mineral fertilization NPK. The farmyard manure + NPK fertilization increased the incidence of leaf and ear diseases of winter triticale in relation to the other fertilization treatments.

Ograniczanie wyników

Experiences with the determination of nitrogen by 0,01 M CaCl2 extractant in Hungarian soils and long-term experiments

The phosphorus in Czech agriculture

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

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

Variation in growth and survival among European provenances of Pinus sylvestris in a 30-year-old experiment

Application of the Nmin soil test in fertilizer recommendations

Soil acidification and the mobilisation of toxic metals caused by acid deposition and fertiliser application

Content of available magnesium, phosphorus and potassium forms in soil exposed to varied crop rotation and fertilisation

Effect of long-term various mineral fertilization and liming on the content of manganese, nickel and iron in soil and meadow sward

Przyszłość monokultur w rolnictwie europejskim

Choroby grzybowe traw w 29. roku doswiadczenia nawozowego mineralnego na lace gorskiej

Dynamics of the pH of limed and unlimed soil on the background of mineralization of nitrogen compounds in long-term meadow experiments

Content of the total and mineral nitrogen in three soil horizons and plant yields in long-term experiments

Relationship between yielding of pea (Pisum sativum L.) and meteorological factors at selected experimental stations in northern and eastern Poland

The most important soil properties and yields of plants in 80 years of static fertilizing experiments in Skierniewice

Balance of heavy metals [Cd, Ni, Pb] in static fertiliser experiments on grasslands

Study of the pH variability in permanent meadow soils resulting from nitrogen fertilization and after-effect of liming

Influence of salinity on growth and organic compounds content of carrot (Daucus carota L.)

Fosfor w sianie laki gorskiej w warunkach dlugotrwalego, statycznego doswiadczenia nawozowego

Wpływ przedplonu i nawożenia na zdrowotność pszenżyta ozimego w doświadczeniu wieloletnim