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EN
The research was accomplished on a permanent meadow situated in a piedmont region (at the altitude of 320 m above sea level) during the period from 1997 to 2005. The field where the research experiment was carried out consisted of brown soil having a granulometric composition of medium loam. At the beginning of the experiment, two plant species predominated in the meadow sward: Yorkshire fag {Holcus lanatus} and oat-grass {Arrhenatherum elatius}. The experiment was carried out on five objects: one control object and four objects fertilized by applying four various fertilizer types, ie one object fertilized with mineral fertilizers, two objects - with barnyard manure, and one - with a mixed fertilizer (barnyard manure and mineral fertilizers). The elements under assessment were: the pH profile of the soil as developed after the 9 years of the fertilization applied, the total nitrogen content in the soil, and nitrate nitrogen & ammonia nitrogen contents in the soil. With regard to the initial stale, the decrease in the soil pH value was the lowest when mineral fertilization was applied; however, the decrease in the total nitrogen content caused by this type of fertilization was the highest. Then again, when comparing this object with the control object, the content of N-NO3 in its soil was 1.5 limes higher and the content of N-NH4 Was as much as 6 limes higher. When the object was fertilized by applying barnyard manure, with its dose amounting to 25 Mg ha-l, the increase in the soil pH was the highest, as was the increase in the contents of ammonia and nitrate nitrogen in the soil. The comparison of the soil fertilized with barnyard manure and of the soil fertilized solely with mineral fertilizers confirmed that in the soil fertilized with barnyard manure, the content of total nitrogen was more than 1.5 limes higher, of N-NH4 - more than twice higher, and of N-NO3 - 3 limes higher than in the soil fertilized with mineral fertilizers. In the soil that was intensely manured, the high content levels of the nitrogen forms studied (NH4+, NO3-) was maintained and caused the soil acidity level to significantly increase.
PL
Badania przeprowadzono w latach 1997-2005 na łące trwałej położonej w rejonie podgórskim (320 m n.p.m.). Na polu doświadczalnym występowała gleba brunatna o składzie granulometrycznym gliny średniej. Gatunkami dominującymi w runi łąkowej na początku badań były: kłosówka wełnista (Holcus lanatus) i rajgras wyniosły (Arrhenatherum elatius). W badaniach uwzględniono pięć obiektów: kontrolę i cztery warianty nawozowe, w tym jeden z nawozami mineralnymi, dwa z obornikiem oraz jeden obiekt z nawożeniem mieszanym (obornik i nawozy mineralne). Elementami oceny było kształtowanie się pH gleby po 9 latach nawożenia i jej zasobność w azot ogólny i azot w formie azotanowej oraz amonowej.
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