Abstract
During my research, I studied the 0.01 M CaCl2 extractable NO3--N, NH4+-N, Norg, P and K contents of the soil samples originated from a long term fertilisation trial in the experimental site Hajdúböszörmény. Relationships among the soil nutrient contents, the agronomic nutrient balances of the 2009 year, and fertilization were studied. From the results of the study it was concluded as follows:– Fertilization significantly increased the CaCl2 extractable NO3--N, NH4+-N, and K contents of soil.– Norg fraction increased as a function of the increasing yield. Hence, it can be assumed that the greater the produced yield, the more the stubble and root residues remain on the arable land. These organic residues can result significant increase in the Norg content of soils.– The CaCl2 extractable P and K contents were compared with the calculated P and K limit values. According to these, the experimental soil has a good phosphorus and lower potassium supply capacity. These results are in accordance with the results of the conventional Hungarian fertilization recommendation system.– It can be stated that the 0.01 M CaCl2 is able to determine not just inorganic N forms but Norg fraction as well that characterize the easily mineralizable nitrogen reserves. The results proved that AL-P and -K (ammonium lactate acetic acid, traditional Hungarian extractant) are in good agreement with the P and K reserves, but it is important from the aspect of environmental protection and plant nutrition to measure the easily soluble and exchangeable K-, and P-contents of soil. 0.01 M CaCl2 method is recommended for this.
Highlights
From the results of the study it was concluded as follows: – Fertilization significantly increased the CaCl2 extractable NO3--N, NH4+-N, and K contents of soil. – Norg fraction increased as a function of the increasing yield
The results proved that ammónium-laktát – ecetsav (AL)-P and -K (ammonium lactate acetic acid, traditional Hungarian extractant) are in good agreement with the P and K reserves, but it is important from the aspect of environmental protection and plant nutrition to measure the easily soluble and exchangeable K, and P-contents of soil. 0.01 M CaCl2 method is recommended for this
A műtrágyázástól függetlenül az összes kezelésben magasabb volt a CaCl2-P értéke, mint a kritikus foszforhatárértékek, ami azt mutatja, hogy a talaj foszforszolgáltatása jó
Summary
Debreceni Egyetem Agrár- és Gazdálkodástudományok Centruma Mezőgazdaság-, Élelmiszertudományi és Környezetgazdálkodási Kar. Vizsgálataim során megmértem egy hajdúböszörményi trágyázási tartamkísérletből származó talajminták 0,01 M CaCl2-dal oldható és kicserélhető NO3--N, NH4+-N, Norg, P és K mennyiségét. Eredményeim a következőkben foglalhatók össze: – Az NPK trágyázás szignifikánsan növelte a CaCl2 által kivont NO3--N, NH4+-N és K mennyiségét. – A Norg frakció megnőtt a nagyobb termések hatására. Hogy nagyobb termések esetén több gyökér és szármaradvány kerül a talajba, amely lebomlásával nő a könnyen oldható és oxidálható szerves nitrogén (Norg) mennyisége. Az AL (ammónium-laktát-ecetsav) jól jellemzi a talaj foszfor és kálium-tartalékait, de emellett nem hanyagolható el a környezetvédelmi és növénytáplálási szempontból fontos könnyen oldható és kicserélhető K-, és P-tartalom mérése sem, amelyre a 0,01 M CaCl2-os módszert ajánlom
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
