A NO3-N és a SO4-S lemosódása egy 28 éves mutrágyázási kísérletben

Translated title of the contribution: Leaching of NO3-N and SO4-S in a 28-year mineral fertilisation experiment

Research output: Contribution to journalArticle

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Abstract

The depth distribution of NO3-N and SO4-S in the soil profile was examined in 2001, in the 28th year of an NPK mineral fertilisation experiment set up on chernozem loam soil with lime deposits at the institute's Experimental Station in Nagyhörcsök. The fertilisers were applied in the form of calcium ammonium nitrate with a 25% N content, 18% superphosphate and 50% potassium chloride. The groundwater was at a depth of 13-15 m and the area was prone to drought. The N0P0K0, N 1P1K1, N2P2K2, N3P3K3 and N1, N2, N3 treatments were investigated in two replications. Two drillings were made in each plot to a depth of 6 m, taking samples every 20 cm. The samples were united for each plot/level, giving a total of 420 samples, which were analysed after extraction with 1 M KCl. The major results were as follows: 1. According to earlier analyses, 40-60% of the surplus N shown by the N balance to have been introduced with mineral fertiliser and not absorbed by the crop could be detected in the form of NO3-N in the upper 6 m of soil. By the 28th year of the experiment a substantial part of the NO3-N reserves had been leached to a depth of more than 6 m, so the leaching boundary could not be identified. Only 5-18% of the surplus N could be detected in the 0-6 m soil profile in the form of NO3-N in 2001. 2. A similar leaching profile was exhibited by SO4-S, maximum values of which were recorded in the upper 1 m and the lowest, 5-6 m layers, in accordance with the timing of replenishment fertilisation with superphosphate. As the result of replenishment fertilisation in autumn 1999 there was an accumulation of SO 4-S in the 0-80 cm layer. The accumulation profile of replenishment fertilisation carried out 20 years earlier in 1980 began at a depth of around 5 m, but the lower boundary of leaching was already below 6 m, so it could not be identified. It is estimated that 80-90% of the S remaining in the soil could be detected in the form of SO4-S in the 0-6 m soil layer. 3. The vertical movement of NO3-N and SO4-S took place at a rate of 20-40 cm/year, according to examinations carried out so far. The water content of the lower soil layers fluctuated around a value of 10% during recent drillings (1995, 2001).

Original languageHungarian
Pages (from-to)415-428
Number of pages14
JournalNovenytermeles
Volume53
Issue number5
Publication statusPublished - 2004

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leaching
minerals
superphosphate
drilling
surpluses
soil profiles
soil
calcium ammonium nitrate
potassium chloride
loam soils
mineral fertilizers
sampling
groundwater
drought
fertilizers
autumn
water content
crops

ASJC Scopus subject areas

  • Agronomy and Crop Science

Cite this

A NO3-N és a SO4-S lemosódása egy 28 éves mutrágyázási kísérletben. / Kádár, I.; Németh, T.

In: Novenytermeles, Vol. 53, No. 5, 2004, p. 415-428.

Research output: Contribution to journalArticle

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title = "A NO3-N {\'e}s a SO4-S lemos{\'o}d{\'a}sa egy 28 {\'e}ves mutr{\'a}gy{\'a}z{\'a}si k{\'i}s{\'e}rletben",
abstract = "The depth distribution of NO3-N and SO4-S in the soil profile was examined in 2001, in the 28th year of an NPK mineral fertilisation experiment set up on chernozem loam soil with lime deposits at the institute's Experimental Station in Nagyh{\"o}rcs{\"o}k. The fertilisers were applied in the form of calcium ammonium nitrate with a 25{\%} N content, 18{\%} superphosphate and 50{\%} potassium chloride. The groundwater was at a depth of 13-15 m and the area was prone to drought. The N0P0K0, N 1P1K1, N2P2K2, N3P3K3 and N1, N2, N3 treatments were investigated in two replications. Two drillings were made in each plot to a depth of 6 m, taking samples every 20 cm. The samples were united for each plot/level, giving a total of 420 samples, which were analysed after extraction with 1 M KCl. The major results were as follows: 1. According to earlier analyses, 40-60{\%} of the surplus N shown by the N balance to have been introduced with mineral fertiliser and not absorbed by the crop could be detected in the form of NO3-N in the upper 6 m of soil. By the 28th year of the experiment a substantial part of the NO3-N reserves had been leached to a depth of more than 6 m, so the leaching boundary could not be identified. Only 5-18{\%} of the surplus N could be detected in the 0-6 m soil profile in the form of NO3-N in 2001. 2. A similar leaching profile was exhibited by SO4-S, maximum values of which were recorded in the upper 1 m and the lowest, 5-6 m layers, in accordance with the timing of replenishment fertilisation with superphosphate. As the result of replenishment fertilisation in autumn 1999 there was an accumulation of SO 4-S in the 0-80 cm layer. The accumulation profile of replenishment fertilisation carried out 20 years earlier in 1980 began at a depth of around 5 m, but the lower boundary of leaching was already below 6 m, so it could not be identified. It is estimated that 80-90{\%} of the S remaining in the soil could be detected in the form of SO4-S in the 0-6 m soil layer. 3. The vertical movement of NO3-N and SO4-S took place at a rate of 20-40 cm/year, according to examinations carried out so far. The water content of the lower soil layers fluctuated around a value of 10{\%} during recent drillings (1995, 2001).",
keywords = "Leaching, Long-term experiment, Mineral fertilisation, NO-N, SO-S",
author = "I. K{\'a}d{\'a}r and T. N{\'e}meth",
year = "2004",
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pages = "415--428",
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T1 - A NO3-N és a SO4-S lemosódása egy 28 éves mutrágyázási kísérletben

AU - Kádár, I.

AU - Németh, T.

PY - 2004

Y1 - 2004

N2 - The depth distribution of NO3-N and SO4-S in the soil profile was examined in 2001, in the 28th year of an NPK mineral fertilisation experiment set up on chernozem loam soil with lime deposits at the institute's Experimental Station in Nagyhörcsök. The fertilisers were applied in the form of calcium ammonium nitrate with a 25% N content, 18% superphosphate and 50% potassium chloride. The groundwater was at a depth of 13-15 m and the area was prone to drought. The N0P0K0, N 1P1K1, N2P2K2, N3P3K3 and N1, N2, N3 treatments were investigated in two replications. Two drillings were made in each plot to a depth of 6 m, taking samples every 20 cm. The samples were united for each plot/level, giving a total of 420 samples, which were analysed after extraction with 1 M KCl. The major results were as follows: 1. According to earlier analyses, 40-60% of the surplus N shown by the N balance to have been introduced with mineral fertiliser and not absorbed by the crop could be detected in the form of NO3-N in the upper 6 m of soil. By the 28th year of the experiment a substantial part of the NO3-N reserves had been leached to a depth of more than 6 m, so the leaching boundary could not be identified. Only 5-18% of the surplus N could be detected in the 0-6 m soil profile in the form of NO3-N in 2001. 2. A similar leaching profile was exhibited by SO4-S, maximum values of which were recorded in the upper 1 m and the lowest, 5-6 m layers, in accordance with the timing of replenishment fertilisation with superphosphate. As the result of replenishment fertilisation in autumn 1999 there was an accumulation of SO 4-S in the 0-80 cm layer. The accumulation profile of replenishment fertilisation carried out 20 years earlier in 1980 began at a depth of around 5 m, but the lower boundary of leaching was already below 6 m, so it could not be identified. It is estimated that 80-90% of the S remaining in the soil could be detected in the form of SO4-S in the 0-6 m soil layer. 3. The vertical movement of NO3-N and SO4-S took place at a rate of 20-40 cm/year, according to examinations carried out so far. The water content of the lower soil layers fluctuated around a value of 10% during recent drillings (1995, 2001).

AB - The depth distribution of NO3-N and SO4-S in the soil profile was examined in 2001, in the 28th year of an NPK mineral fertilisation experiment set up on chernozem loam soil with lime deposits at the institute's Experimental Station in Nagyhörcsök. The fertilisers were applied in the form of calcium ammonium nitrate with a 25% N content, 18% superphosphate and 50% potassium chloride. The groundwater was at a depth of 13-15 m and the area was prone to drought. The N0P0K0, N 1P1K1, N2P2K2, N3P3K3 and N1, N2, N3 treatments were investigated in two replications. Two drillings were made in each plot to a depth of 6 m, taking samples every 20 cm. The samples were united for each plot/level, giving a total of 420 samples, which were analysed after extraction with 1 M KCl. The major results were as follows: 1. According to earlier analyses, 40-60% of the surplus N shown by the N balance to have been introduced with mineral fertiliser and not absorbed by the crop could be detected in the form of NO3-N in the upper 6 m of soil. By the 28th year of the experiment a substantial part of the NO3-N reserves had been leached to a depth of more than 6 m, so the leaching boundary could not be identified. Only 5-18% of the surplus N could be detected in the 0-6 m soil profile in the form of NO3-N in 2001. 2. A similar leaching profile was exhibited by SO4-S, maximum values of which were recorded in the upper 1 m and the lowest, 5-6 m layers, in accordance with the timing of replenishment fertilisation with superphosphate. As the result of replenishment fertilisation in autumn 1999 there was an accumulation of SO 4-S in the 0-80 cm layer. The accumulation profile of replenishment fertilisation carried out 20 years earlier in 1980 began at a depth of around 5 m, but the lower boundary of leaching was already below 6 m, so it could not be identified. It is estimated that 80-90% of the S remaining in the soil could be detected in the form of SO4-S in the 0-6 m soil layer. 3. The vertical movement of NO3-N and SO4-S took place at a rate of 20-40 cm/year, according to examinations carried out so far. The water content of the lower soil layers fluctuated around a value of 10% during recent drillings (1995, 2001).

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KW - Long-term experiment

KW - Mineral fertilisation

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KW - SO-S

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