A N-ellátás hatása a szójaliszt fehérje- és aminosav-tartalmára

Translated title of the contribution: Effect of N supplies on the protein and amino acid contents of soya flour

L. Márton, Gábor Szuts, I. Kádár

Research output: Contribution to journalArticle

Abstract

The effect of N fertilisation on the seed yield and on the crude protein and amino acid contents of soya was examined in a lysimeter experiment set up on Ramann's calcareous sandy loam (CaCO3 2.1%, humus 1.3%, silt 28%, poorly to moderately supplied with available P and K). The treatments were 0, 40, 80 and 120 kg/ha N in the form of NH4NO3, with 100 kg/ha P2O5 and 120 kg/ha K2O as basic fertiliser. The four N treatments were set up in three replications using a total of 12 lysimeters, each of which had a soil volume of 4 m3 and a growing area of 4 m2. The plant stand was equivalent to a density of 500 000 plants/ha and the water supply was adjusted to 70% field water capacity. The major conclusions can be summarised as follows: 1. The yield of uninoculated soya increased parallel to the rate of N fertilisation or the N supplies of the soil. The N % and crude protein content of the seed was not modified to any great extent by N fertilisation, since the soil supplies were utilised in forming a yield surplus. The crude protein yield per hectare increased with the seed yield and rose by some 70 % as the N supplies improved. 2. As a result of the N surplus arising in the 2nd and 3rd years of the experiment the seed yield was 4-5 t/ha, the seed N content was 6-7%, the crude protein content was 35-40% and the crude protein yield was 1.8 t/ha, i.e. three times that obtained in the 1st year. 3. In contrast to the results of field experiments, probably due to the less drastic N surplus, the amino acid content did not differ significantly in the majority of cases as a function of the N supply. However, there was a significant rise in the contents of the essential amino acids threonine (THR) and methionine (MET) and in those of the non-essential amino acids serine (SER) and aspartic acid (ASP). This increase was moderate, averaging 10-15%. 4. The essential and non-essential amino acid contents of soya flour amounted to 10 and 15-16 g/100 g protein, respectively, giving a total value of 25-26 g/100 g protein. The total amino acid yield fluctuated between 226 and 376 kg/ha, rising roughly parallel with the seed yield. In the first year of the experiment the N surplus was not great enough to cause major modifications in the crude protein contents or amino acid composition.

Original languageHungarian
Pages (from-to)417-422
Number of pages6
JournalNovenytermeles
Volume47
Issue number4
Publication statusPublished - Aug 1998

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soy flour
crude protein
surpluses
amino acids
seed yield
proteins
protein content
lysimeters
soil
aspartic acid
seeds
humus
essential amino acids
amino acid composition
threonine
serine
silt
water supply
methionine
Rosa

ASJC Scopus subject areas

  • Agronomy and Crop Science

Cite this

A N-ellátás hatása a szójaliszt fehérje- és aminosav-tartalmára. / Márton, L.; Szuts, Gábor; Kádár, I.

In: Novenytermeles, Vol. 47, No. 4, 08.1998, p. 417-422.

Research output: Contribution to journalArticle

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title = "A N-ell{\'a}t{\'a}s hat{\'a}sa a sz{\'o}jaliszt feh{\'e}rje- {\'e}s aminosav-tartalm{\'a}ra",
abstract = "The effect of N fertilisation on the seed yield and on the crude protein and amino acid contents of soya was examined in a lysimeter experiment set up on Ramann's calcareous sandy loam (CaCO3 2.1{\%}, humus 1.3{\%}, silt 28{\%}, poorly to moderately supplied with available P and K). The treatments were 0, 40, 80 and 120 kg/ha N in the form of NH4NO3, with 100 kg/ha P2O5 and 120 kg/ha K2O as basic fertiliser. The four N treatments were set up in three replications using a total of 12 lysimeters, each of which had a soil volume of 4 m3 and a growing area of 4 m2. The plant stand was equivalent to a density of 500 000 plants/ha and the water supply was adjusted to 70{\%} field water capacity. The major conclusions can be summarised as follows: 1. The yield of uninoculated soya increased parallel to the rate of N fertilisation or the N supplies of the soil. The N {\%} and crude protein content of the seed was not modified to any great extent by N fertilisation, since the soil supplies were utilised in forming a yield surplus. The crude protein yield per hectare increased with the seed yield and rose by some 70 {\%} as the N supplies improved. 2. As a result of the N surplus arising in the 2nd and 3rd years of the experiment the seed yield was 4-5 t/ha, the seed N content was 6-7{\%}, the crude protein content was 35-40{\%} and the crude protein yield was 1.8 t/ha, i.e. three times that obtained in the 1st year. 3. In contrast to the results of field experiments, probably due to the less drastic N surplus, the amino acid content did not differ significantly in the majority of cases as a function of the N supply. However, there was a significant rise in the contents of the essential amino acids threonine (THR) and methionine (MET) and in those of the non-essential amino acids serine (SER) and aspartic acid (ASP). This increase was moderate, averaging 10-15{\%}. 4. The essential and non-essential amino acid contents of soya flour amounted to 10 and 15-16 g/100 g protein, respectively, giving a total value of 25-26 g/100 g protein. The total amino acid yield fluctuated between 226 and 376 kg/ha, rising roughly parallel with the seed yield. In the first year of the experiment the N surplus was not great enough to cause major modifications in the crude protein contents or amino acid composition.",
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