Wyniki wyszukiwania

1

Effect of ammonium nitrate on nitrogenase activity in pea varietes Ramir and Koral

100%

Wojcieska U., Mroczkowski W., Podlesna A., Kocon A.

Bulletin of the Polish Academy of Sciences. Biological Sciences

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1994

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tom 42

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nr 2

2

Physiological role of copper in dry matter and nitrogen accumulation in Lupinus luteus L.

100%

Seliga H.

Acta Physiologiae Plantarum

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1995

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tom 17

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nr 4

3

Grain yield, dry matter and nitrogen accumulation in spring wheat cultivars differing in nutrients utilization efficiency

86%

Oracka T., Cieply J.

Polish Journal of Natural Sciences. Supplement

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2003

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tom 01

4

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Accumulation of macroelements in plants on newly established fallows

86%

Zarczynski P., Sienkiewicz S., Krzebietke S.

Journal of Elementology

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2008

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tom 13

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nr 3

In spring 1996, four types of fallows were established on good wheat complex soil (classified as IIIa in the Polish soil classification system): sown with oriental goat’s rue (Galega orientalis, Lam.), traditional fallow, seeded with a mixture of oriental goat’s rue (Galega orientalis Lam) and smooth brome (Bromus inermis) and under smooth brome (Bromus inermis). This paper documents the results obtained in 2000-2004. Plant samples (4 x 1 m2) were taken from the fallows once every year at the same plant growth and development stage. The content of macroelements in the plant material was determined using conventional methods. The statistical elaboration of the results was based on the analysis of regression and correlation. The results proved that fallow under perennial plants is superior in activating and cycling nutrients to traditional fallow, overgrown with wild plants. On the other hand, when fallow soil is covered exclusively with a papilonaceous plant (e.g. oriental goat’s rue), it is more likely to experience transfer of nitrates (V) to ground waters. A good solution to this problem could be sowing fields which are set aside as fallows sown with a mixture of oriental goat’s rue and smooth brome. Soil protected by these two plants remains fertile and does not create an ecological risk caused by migrating N-NO3.

5

Accumulation and retranslocation of nitrogen and phosphorus in the foliage of Pinus sylvestris L. and Betula pubescens in chosen woodland ecosystems of the Slovinski National Park

58%

Parzych A., Trojanowski J., Sobisz Z.

Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline

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2010

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tom 14

The study of foliage was carried out in two different forest ecosystems: Vaccinio uliginosi- Betuletum pubescentis and Empetro nigri-Pinetum in the Slovinski National Park in the period of 2002-2005. The largest volume of nitrogen and phosphorus in the litter of coniferous needles was found in early summer at the moment of maximum growth. An average concentration of nitrogen in examined needles was between 1.296% and 1.358% N in Vaccinio uliginosi-Betuletum pubescentis and from 1.010% to 1.118% N in Empetro nigri-Pinetum. The decrease of biogenes concentration in plant tissues was observed in the autumn months as a result of lower demand and recession of biogenes connected with storage of valuable elements in the fatter parts of the trees. In the fall season, a gradual recession of nutrients from the litter of coniferous needles was observed. In Vaccinio uliginosi-Betuletum pubescentis insignificant quantity of nitrogen recesses (average 5.6%) from the new and one year old litter of coniferous needles, including 47.2% N-NH4 and 78.6% N-NO3 and about 21.8% P, including 11.7% P-PO4. In Empetro nigri-Pinetum more intensive recession of biogenes was found from the litter of coniferous needles of common pine than in Vaccinio uliginosi-Betuletum pubescentis. On average 11.5% T-N is translocated, including 41.4% N-NH4 and 23.8% N-NO3 as well as 22.3% P, including 11.8% P-PO4.

6

Effect of sowing rate of Italian ryegrass drilled into pea stubble on removal of soil mineral mitrogen and autumn nitrogen accumulation by herbage yield

58%

Kramberger B., Gselman A., Kapun S., Kaligaric M.

Polish Journal of Environmental Studies

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2007

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tom 16

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nr 5

705-713

The experiment was carried out in Slovenia in 2002-03 and 2004-05. The experimental design was a randomized completed block, with four replicates. In the summer after pea harvesting, 10, 20 and 30 kg of Italian ryegrass ha-1 were drilled into minimally cultivated pea stubble, in which, on average, 12.5 pea grains m-2 were left among crop residues. The ryegrass/pea mixtures in our experiments took up the soil mineral nitrogen the most efficiently and accumulated the highest amount of nitrogen in the autumn herbage yield, at a seeding rate of 30 kg drilled Italian ryegrass. The differences among treatments regarding 0-60 cm soil N03-N and NH4-N contents were highest at the first cut and decreased until March of the next year. In order to achieve efficient early and high N uptake of mineralized nitrogen, it is not recommended to lower the sowing rates of Italian ryegrass for drilling into pea stubble to reduce the high cost of catch crop seeds.

7

Properties of organic matter of soil fertilised with spent mushroom (Agaricus L.) substrate

58%

Becher M.

Acta Agrophysica

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2013

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tom 20

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nr 2

The objective of the study was the estimation of quality of organic matter of the humus horizon of soil fertilised every year, for ten years, with spent mushroom (Agaricus L.) substrate, as compared to a soil without such amendment. Fractionation of organic matter was performed, as well as quality analyses of humic acids and fractionation of organic nitrogen complexes. In the humus horizon of the soil fertilised with spent mushroom substrate lower acidity was noted, and higher levels of C, N, P and Ca. In the soil amended with the substrate greater accumulation of soil humus was noted (by nearly 50%), and especially of the fraction of humic acids, which had a positive impact on increasing the value of the ratio of humic to fulvic acids. The fertilisation with the substrate only slightly modified the quality parameters of humic acids. In the soil fertilised with the substrate a higher level of carbon and nitrogen was observed – related with the soluble forms of organic matter, as well as greater accumulation of nitrogen, mainly in a stable non-hydrolysing form.

Ograniczanie wyników

Effect of ammonium nitrate on nitrogenase activity in pea varietes Ramir and Koral

Physiological role of copper in dry matter and nitrogen accumulation in Lupinus luteus L.

Grain yield, dry matter and nitrogen accumulation in spring wheat cultivars differing in nutrients utilization efficiency

Accumulation of macroelements in plants on newly established fallows

Accumulation and retranslocation of nitrogen and phosphorus in the foliage of Pinus sylvestris L. and Betula pubescens in chosen woodland ecosystems of the Slovinski National Park

Effect of sowing rate of Italian ryegrass drilled into pea stubble on removal of soil mineral mitrogen and autumn nitrogen accumulation by herbage yield

Properties of organic matter of soil fertilised with spent mushroom (Agaricus L.) substrate