• Korean Journal of Soil Science and Fertilizer
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• v.21 no.3
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• pp.301-306
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• 1988

Contents and distribution of amino acids in the hydrolysates of humic acids extracted from straw of rice and barley at three different dates during decomposition were examined. The results obtained from this study may be summed up as the following: 1. There are differences between the humic acid hydrolysates from rice straw and barley straw in regards of composition of humic acids and distribution of amino acids. 2. Neutral amino acids as a group occupy the largest share, followed by acidic amino acids and basic amino acids. 3. The total amount of amino acids per gram of humic acid is greater in straw of rice than in straw of barley. 4. With the humification progressing the content of lysine increases, but the content of histidine decreases. In general glycine, glutamic acid, aspartic acid, alanine and leucine constitute the 5 predominant amino acids in all hydrolysates. 5. Arginine is not detected at all in any of the hydrolysates of humic acids obtained from humified materials. 6. The presence of phenylalanine and tyrosine is an evidence for the aromatic characteristics of humic acids.

• Journal of Bio-Environment Control
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• v.20 no.4
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• pp.269-276
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• 2011

The aim of this study was to evaluate the effect of 3 environment- friendly farming materials on the growth of pepper and tomato seedlings under low level of solar radiation. The pepper and tomato seedlings were separately grown on commercial substrate and non-fertilizer substrate under 30% shading condition, respectively. The microbe-, enzyme-, and amino acid-supplements were used for the foliar application to the seedlings. The application of enzyme- and amino acid-supplements significantly enhanced the growth of tomato and pepper seedlings grown on non-fertilizer substrate, while there was no significant effect on the seedlings grown on commercial substrate. The foliar application of enzyme- and amino acid-supplements reduced the days to flowering by 3 to 4 days and lowered the node order of fruit set in tomato plants grown on non-fertilizer substrate. The results showed that the enzyme- and amino acid-supplements could enhance the seedling growth and lower the node order of fruit set under limited nutritional conditions.

• Journal of Environmental Science International
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• v.24 no.1
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• pp.55-64
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• 2015

The dry weight of mother plants' leaves had the highest increase rate in both NS (single-use) and NS+EM (mixed-use) mixed with NS 0.8 (customary use). In seafood amino acid fertilizer (SAF) application, the increase rate was highest in SAF solution at a 300-fold dilution. Mother plants' crown diameter, plant height, leaf length, leaf width, petiole length and leaf number showed the greatest growth amount when NS 0.8 (customary use) was mixed to NS (single-use) or NS+EM (mixed-use) solution. The growth was highest in SAF solution diluted 300 folds, but lowest in SAF solution diluted 100 folds. Of all inorganic nutrients, excluding sulfur, total amount of nitrogen, available phosphorus, potassium, calcium and magnesium had the highest increase rate in both NS (single-use) and NS+EM (mixed-use) with the treatment of NS 0.8 (customary use). Total nitrogen, in particular, was increased by 3.1% in NS 0.4, 6.0% in NS 0.8, and 4.5% in NS 0.8 with the application of NS+EM at a 500-fold dilution compared to NS alone. Total nitrogen amount showed the highest increase rate in SAF solution diluted 300 folds. Total nitrogen, available phosphorus, calcium, magnesium and EC in soils applied with culture solutions (NS, NS+EM) had increasing tendencies after fertilizer application. The results were comparable to those of SAF treatment. The increase rate of each inorganic nutrient composition declined in soils applied with NS+EM solution diluted 500 folds compared to NS alone.

• Journal of Environmental Science International
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• v.19 no.10
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• pp.1293-1299
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• 2010

This study was carried out to compare and analyze the effect of Korean effective microorganism(KEM) and seafood amino acid fertilizer(SAF) application on apple on functional substances of fruit. Vitamin C in fruit of control and KEM/SAF treated were 29.3 and, 39.8 mg, respectively. Also active oxygen scavenging ability of those treatments measured with DPPH method were 40.6 and 54.1%, respectively. Vitamin E contents of those treatments were 2.51 and 2.50 mg, respectively. Sitosterol, a phytosterol, contents of those treatments were 4.79 and 5.41 mg, respectively. Proportion of sugars, fructose, glucose, and sucrose in the fruit of control were 36.1, 15.3 and 17.8%, respectively. Those of the fruit of KEM/SAF treated were 45.9, 13.2 and 18.8%, respectively. Malic acid contents of control and KEM/SAF treated fruits were 53.7 and 43.8%, respectively.

• Asian Journal of Turfgrass Science
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• v.26 no.1
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• pp.54-59
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• 2012

This study was conducted to evaluate to the effect of liquid fertilizer with saponin (SLF) and liquid fertilizer with amino acid (ALF)on the growth of creeping bentgrass. In creeping bentgrass, turf color index, chlorophyll index, dry weight and shoot number were measured. It was hardly affected by SLF and ALF applications in investigation of chemical properties of the soil. By applying SLF and ALF, turf color index and chlorophyll index in 2SLF and 2ALF were increased more than CF, and shoot number and root length in 2SLF, ALF and 2ALF were higher than CF. In correlation coefficient among growth factors of creeping bentgrass, turf quality was significantly different in root length, shoot number, dry weight, and content of N and K in turf tissue (P<0.05), N content of tissue was significantly in root length, shoot number and dry weight (P<0.05), and K content was significantly in shoot number and dry weight (P<0.05). These results suggested that application of functional liquid fertilizers such as SLF and ALF was expected to replace compound fertilizer in turf management and that applied SLF and ALF was stimulated the uptake of N and K into turf so that turf qualities were improved by enhancing growth shoot and root of turf.

• Korean Journal of Environmental Agriculture
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• v.41 no.4
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• pp.236-244
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• 2022

BACKGROUND: Liquid fertilizers can provide nutrients to crops effectively and quickly. Amino acid liquid fertilizers produced by decomposing the residues of rendered livestock carcasses are expected to be effective in improving the productivity and quality of crops. METHODS AND RESULTS: The treatment conditions for maize cultivation were control (Cn), inorganic fertilizer (IF), inorganic fertilizer and rendering residue liquid fertilizer (IF+RALF), compost (CP), compost and rendering residue liquid fertilizer (CP+RALF). Crop productivity, sugar content, and nutrient uptake were investigated after maize harvest in the field applied with liquid fertilizers. Maize yields ranged from 87.6-158 g/plant, and the yield increased by 7.9% and 12.9% in IF+RALF IF+RALF and CP+RALF than in IF and CP, respectively. The maize sugar content increased in the range of 0.1-0.5 brix % by rendering residue liquid fertilizer (RALF) fertilization, and the sugar content was the highest in CP+RALF. There was no significant change in soil chemical properties of the soil due to liquid fertilizer treatment. CONCLUSION(S): RALF increased yield and sugar content in maize cultivation, and fertilization with organic fertilizers was more effective for maize cultivation than inorganic fertilizers. Residues of rendered livestock carcass can be recycled as amino acid fertilizers, which can be effectively used for crop production and quality improvement.

• Journal of Plant Biology
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• v.18 no.2
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• pp.53-58
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• 1975

Three varieties of soybean, Chungtaik, Hillkong, and Endaedu which have been recommended to cultivate widely in Cheju Island, were chosen to study their amino acid metabolism in order to determine their nutritional values. 1) The total nitrogen contents of these soybeans were decreased in the order of Chungtaik, Hillkong, and Endaedu, indicating that the last variety is undesirable for a recommened formae even under a favorable condition of cultivation. The Hillkong variety may well be recommended for cultivation for a source of lipid rather than protein. 2) From analysis fo free amino acids, it was found that Hillkong contained normal amounto f vaious amino acids but Endae여 contained them in very abnormal fashion suggesting that an improved scheme of fertilization is necessary. Data from Chungtaik indicated it was excessively supplied with N fertilizer. 3) The amino acid contents of proteins extracted from these soybeans showed that Chungtaik contained less number of amino acids in its protein than the other two. The distribution of these amino acids appeared normal in Hillkong but quite irregular in Endaedu. In conclusion, both Chungtaik and Hillkong could be recommended for cultivation, the former as a protein source, the latter a lipid source of foods. Endaedu, however, may be liable to further research before it will be recommend for cultivation.

• Korean Journal of Soil Science and Fertilizer
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• v.44 no.2
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• pp.200-205
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• 2011

This study was conducted to find the physico-chemical properties and the amino acid content of the pigs hoof hydrolysate, keratin protein and to investigate its fertilizer effect on the growth of crops. The keratin proteins such as pigs hoof were alkali-hydrolyzed to produce the hydrolysates. The chemical properties of the hydrolysate of pigs hoof was 6~7 of pH and $10{\sim}15dS\;m^{-1}$ of EC. Total amino acid contents released from the pigs hoof were 10.18%, respectively. The pot experiment was carried out for the cultivation of lettuce. The treatment design of these pot cultivation was composed of Control (compost + NPK), PHH-0.5, PHH-1.0, PHH-2.0 (${\times}2,000$ ; 1,000 ; 500 diluted solution of pig hoof hydrolysate). After lettuce cultivation, the pH values in all treatment soils were decreased than those in initial soils, and the exchangeable cation value was higher than that of control. In all PHH treatments, lettuce growth was better in the leaf length by 6~16% and the leaf width by 4~15% than in control. Therefore, the PHH solutions manufactured by hydrolysis process had plenty of amino acids, and among them PHH had the most abundant nutrients and amino acids with highest growth and yield effect on lettuce.

• Korean Journal of Soil Science and Fertilizer
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• v.22 no.1
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• pp.31-38
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• 1989

A series of experiments was conducted to determine the contents and distribution of amino acids in the hydrolysates of humic acids extracted from 3 plant materials. Wild grass hay, and leaves of forest trees were used in this study. Seventeen amino acids were analyzed and their amounts determined. Results obtained from the experiments are summarized in the following: 1. Contents and distribution of hydrolyzable amino acids in the humic acid fractions depend on the kind of plant materials and the allowed time for humification. 2. Neutral amino acids was the largest part of the total amino acids, followed by acidic amino acids, and basic amino acids. 3. The total amounts of amino acids in the hydrolyzable humic acid fractions of well humified residues were in the following order: wild grass hay > leaves of deciduous trees > leaves of coniferous trees 4. In general the relative amounts of lysine increased with humification progressing. S. Glycine and glutamic acid were the two major amino acids in common for the hydrolysate of humic acids extracted from well decomposed residues of plant materials. Alanine, glutamic acid, glycine, aspartic acid and leucine were the five major amino acid in common in raw materials without exception. 6. Arginine appeared to be absent in any of the hydrolysates of humic acids from well humified plant materials. 7. Phenylalanine and tyrosine were present in all hydrolysates and their relative contents increased with the humification of plant materials.

• Korean Journal of Soil Science and Fertilizer
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• v.31 no.2
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• pp.128-136
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• 1998

Most of total nitrogen in the surface soil exists in organic forms, of which amino acid-N is the major fraction. By-product fertilizers provide soil with humic substances, and humic acid is an essential component of humus. Amino acids(AAs) are easily converted to inorganic-N forms and thus play an important role in N fertility. This experiment was conducted to investigate the contents and distributions of AAs in humic acids which were extracted from the commercial by-product fertilizers of different composting materials. Total contents of AAs in humic acids ranged from 1.2 to 5.6%, of which neutral AAs were the highest with ranges of 0.8~4.5%. AAs contents in fertilizers composted from the plant residues such as leaf litter, sawdust and bark were in an order of neutral>acidic>basic AAs. In contrast, those from animal wastes, such as poultry and pig manures, were in an order of neutral>basic>acidic AAs. Distributions of total, acidic and neutral AAs were in the respective order of leaf litter>sawdust>pig manure>poultry manure>peat, bark>sawdust>leaf litter>peat and leaf litter>sawdust>bark>peat. Distributions of the basic AAs were in the reversed order of the acidic AAs. In bark fertilizer with increasing compost maturity, contents of the acidic AAs were increased in compensation for the decreases in those of neutral and basic AAs. Results demonstrated that distributions of amino acids in humic acid of by-product fertilizers were different from composting raw materials and degrees of humification.