scholarly journals Effects of Soil Conditioners on Absorption of phosphorus by waxy corn and Phosphorus Transformation in High Phosphorus Soils

2020 ◽  
Vol 143 ◽  
pp. 02024
Author(s):  
Wang Xi ◽  
Lu Shuchang ◽  
Pei Zhiqiang ◽  
Hou Kun ◽  
Ya Zongjie ◽  
...  
Keyword(s):  
Humic Acid ◽  
Total Phosphorus ◽  
Phosphorus Content ◽  
Organic Phosphorus ◽  
Soil Phosphorus ◽  
Inorganic Phosphorus ◽  
Total Phosphorus Content ◽  
The Third ◽  
Phosphorus Accumulation ◽  
Waxy Corn

In this experiment, the effects of different types of conditioners and their application on the absorption and transformation of phosphorus in high phosphorus soils in facilities were investigated to improve the environmental problems of protected farmland caused by phosphorus accumulation. Waxy corn was used as a test crop, and five conditioners such as humic acid, biochar, bentonite, alum, and dephosphorized gypsum were used as test materials for potting experiments. The experiment set 10 treatments, namely T1(Blank control), T2(Humic acid), T3(Biochar), T4(Bentonite), T5(Alum), T6 (Dephosphorized gypsum), T7(Biochar-bentonite-alum), T8(Humic acid-biochar-alum),T9(Humic acidbiochar- bentonite-alum),T10(Humic acid-bentonite-biochar-alum-dephosphorized gypsum). Based on the analysis of the results of the three crops, except that the first crop was not significant, the biomass and phosphorus absorption of waxy corn of T2 was the highest in the second crop, and T10 was the most effective treatment in the third crop. The soil available phosphorus content of T8 was the lowest in the second crop and that of T10 was the lowest in the third crop, which were 12.01% and 12.75% lower than the control. The soil water-soluble phosphorus content of T4 was the lowest in the second crop, which was 41.84% lower than the control, and that of T8 was the lowest in the third crop, which was 26.62% lower than the control. According to the results of the three crops, the ratio of the total phosphorus content of the inorganic phosphorus in the third crop of each treatment was increasing compared with the first crop. The soil phosphorus was transformed from organic phosphorus to inorganic phosphorus. The ratio of total phosphorus content of organic phosphorus of T6, T9, T10 was larger than other treatments, which slowed down the conversion of phosphorus to available form. The ratio of Ca8-P in the inorganic phosphorus was the highest, reaching about 50% to 60%. From the results and analysis, T2 and T10 were beneficial to the absorption of soil phosphorus by waxy corn, T8 and T10 were beneficial to slow down the conversion of phosphorus to the effective state, reduce the potential risk of phosphorus environment, improve the phosphorus accumulation environmental issues in greenhouse farmland.

scholarly journals Effect on a peat soil of application of superphosphate at various rates

1959 ◽  
Vol 31 (1) ◽  
pp. 120-130
Author(s):  
Armi Kaila
Keyword(s):  
Total Phosphorus ◽  
Dry Matter ◽  
Phosphorus Content ◽  
Organic Phosphorus ◽  
Peat Soil ◽  
Available Phosphorus ◽  
Untreated Soil ◽  
Total Phosphorus Content ◽  
Low Phosphorus ◽  
Better Than

The effect on a fen soil of superphosphate applied for 34 years at the annual rates of 0, 100, 200, and 300 kg/ha was studied. The material consisted of samples from a field trial at the Leteensuo Experiment Station. The soil samples from the ploughing layer were collected in autumn 1956, and the hay samples from the crop harvested in 1957. The hay yields from the treatments with 200 or 300 kg/ha of superphosphate were about 7400 kg/ha, and the phosphorus content of the hay 1.69 and 1.85 per cent, respectively. The treatment with 100 kg/ha of superphosphate yielded only about 5100 kg/ha of hay dry matter with a very low phosphorus content, 0.96 per cent. The yield from the untreated plots was almost negligible. Also the biological and chemical soil tests showed that the untreated soil was almost depleted of available phosphorus. The phosphorus conditions in the soil annually treated with 100 kg/ha of superphosphate were not significantly better than in the untreated soil. An annual anplication of 200kg/ha of superphosphate was able to maintain a more satisfactory rate of available phosphorus in the soil, but only the treatment with 300 kg/ha of superphosphate resulted in markedly higher test values than those for the lower treatments. The total phosphorus content of the soil was the higher the larger the amount of superphosphate applied. About 40 to 50 per cent of the differences between the total phosphorus content of the treated and untreated samples was due to organic phosphorus. The potassium content of the hay was the lower the higher the superphosphate treatment. The hay from the treatment with 300 kg/ha of superphosphate contained only 1.25 per cent potassium. The possibility that potassium was a minimum factor in this treatment was discussed.

738. Phospholipids in New Zealand dairy products: III. Effect of storage on the phospholipids and on the partition of phosphorus in butter

1958 ◽  
Vol 25 (3) ◽  
pp. 475-479 ◽  
Author(s):  
A. K. R. McDowell
Keyword(s):  
New Zealand ◽  
Total Phosphorus ◽  
Dairy Products ◽  
Trichloroacetic Acid ◽  
Phosphorus Content ◽  
Organic Phosphorus ◽  
Phosphorus Compounds ◽  
Inorganic P ◽  
Total Phosphorus Content ◽  
Total P

Average values for the total phosphorus content of sera from unsalted butter samples and for the phosphorus contents of the various fractions of the sera after partition with trichloroacetic acid were: total P, 83·6 mg./100g.; acid-soluble P, 32·4 mg./100 g.; inorganic P, 28·8 mg/100 g.; acid-insoluble P, 51·2 mg./100 g.; and phospholipid p, 33·6 mg./100 g.There was no evidence that decomposition of the phospholipids or other organic phosphorus compounds occurred in salted or unsalted sweet-cream butters during storage at –10° C. for 8 months.

Sheep faeces in relation to the phosphorus cycle under pastures

1961 ◽  
Vol 12 (1) ◽  
pp. 111 ◽  
Author(s):  
SM Bromfield
Keyword(s):  
Total Phosphorus ◽  
Inorganic Phosphate ◽  
Phosphorus Content ◽  
Organic Phosphorus ◽  
Subterranean Clover ◽  
Inorganic Phosphorus ◽  
Sheep Grazing ◽  
Phosphorus Cycle ◽  
Soil Organic Phosphorus ◽  
Pot Culture

Faeces from sheep grazing naturalDanthonia pastures and improved subterranean clover pastures have been analysed for total phosphorus and inorganic phosphate over a period of 2 years. Both total and inorganic phosphorus contents (milligrams P per gram) varied widely with type of pasture and with season. The variation in organic phosphorus content (by difference) remained, relative to total phosphorus, fairly constant throughout. Total phosphorus content varied from 1.8 to 17 mg P/g whilst organic phosphorus varied from 1.5 to 4.0 mg P/g. Sheep grazing the improved pastures voided approximately 2.5–3 lb P as inorganic phosphate and 0.5–0.75 lb P as organic phosphorus per sheep per year. The inorganic phosphate was readily soluble in acid but not in water and was readily available to wheat grown in pot culture. The organic phosphorus was not readily available to plants and was not rapidly mineralized to inorganic phosphate. The contribution faecal phosphorus makes to the nutrition of pastures and to the reserve of soil organic phosphorus is briefly discussed.

scholarly journals Phosphorus in various depths of some virgin peat lands

1956 ◽  
Vol 28 (1) ◽  
pp. 90-104
Author(s):  
Armi Kaila
Keyword(s):  
Total Phosphorus ◽  
Phosphorus Content ◽  
Organic Phosphorus ◽  
Total Content ◽  
Inorganic Phosphorus ◽  
Point Of View ◽  
Phosphorus Compounds ◽  
Surface Layers ◽  
P Content ◽  
As Solubility

In the present paper results are reported concerning the total content as well as solubility of organic and inorganic phosphorus in 122 peat samples which were collected from various depths of 30 peat lands. The total phosphorus content of all the samples was rather low and no regularity in the influence of the depth upon this quantity could be demonstrated. There seemed to be some tendency to an increase in the P-content with increasing depth in the peat lands of lower quality. In peat lands of higher quality the opposite often held true. A large part of the phosphorus occurred in organic form, and, almost without exception, this percentage of total phosphorus increased with the depth: in undecomposed plant material this proportion was about 50—60 per cent, in the surface layers 70 per cent, on the average, in deposits deeper than 50 cm seldom less than 80 per cent and it could even reach 95 per cent. 1he amount of organic phosphorus expressed as a percentage of organic dry matter was low in most of the samples and although it tended to increase with the depth only in 11 of all the 122 samples values higher than 0.1 per cent were obtained. Even if an allowance is made for the conditions prevailing in peat lands these low percentages of organic phosphorus indicate that, from the microbiological point of view, no rapid mineralization of the organic phosphorus compounds is probable. The inorganic phosphorus content was low and tended to decrease from the surface to deeper layers. The solubility of inorganic phosphorus, however, dropped much more drastically. Thus in the deeper layers the amount of easily extractable inorganic phosphorus could be negligible. The solubility of organic phosphorus also impaired with the depth. The phosphorus economy of peat lands was discussed on the basis of the results obtained.

Foliar concentrations and resorption of nitrogen and phosphorus in 15 species of eucalypts grown under non-limited water and nutrient availability

2000 ◽  
Vol 48 (5) ◽  
pp. 597 ◽  
Author(s):  
B. Hawkins ◽  
P. J. Polglase
Keyword(s):  
Total Phosphorus ◽  
Organic Phosphorus ◽  
Soil Phosphorus ◽  
Inorganic Phosphorus ◽  
Leaf Nitrogen ◽  
Phosphorus Use Efficiency ◽  
Nitrogen And Phosphorus ◽  
Foliar Phosphorus ◽  
Foliar Concentrations ◽  
Nutrient Amendment

Mature and senescent foliage were sampled from 15 species of Eucalyptus, covering three subgenera, Symphyomyrtus, Monocalyptus and Corymbia, under non-limiting availability of water and nutrients (effluent-irrigated plantation). Concentrations of total phosphorus in mature foliage were relatively high for Eucalyptus (range 1.6–3.1 mg g–1), inorganic phosphorus accounting for 60–79% of total phosphorus. Foliar concentrations of total and inorganic phosphorus in Monocalyptus were about twice as much as in Symphyomyrtus. Concentrations of nitrogen did not differ amongst subgenera. About 50% of leaf nitrogen was resorbed during senescence. In contrast, about 11–24% of phosphorus was resorbed, of which about 48–77% was derived from hydrolysis of organic phosphorus. There were no significant differences amongst subgenera in resorption of either nitrogen or phosphorus. Despite significant variability in nutritional characteristics within subgenera, we conclude that Monocalyptus has a greater capacity to accumulate foliar phosphorus (as inorganic phosphorus) than Symphyomyrtus, but that Symphyomyrtus has a greater phosphorus-use efficiency (ratio of growth to foliar phosphorus). Foliar inorganic phosphorus appears to be easily manipulated by nutrient amendment whereas nitrogen is highly resistant. Resorption efficiency of phosphorus (proportion of total phosphorus resorbed) is decreased under high availability of soil phosphorus.

scholarly journals Effect of liming on the mobilization of soil phosphorus

1965 ◽  
Vol 37 (4) ◽  
pp. 243-254
Author(s):  
Armi Kaila
Keyword(s):  
Soil Ph ◽  
Phosphorus Content ◽  
Marked Decrease ◽  
Soluble Fraction ◽  
Organic Phosphorus ◽  
Soil Phosphorus ◽  
Inorganic Phosphorus ◽  
Phosphorus Fractions ◽  
Minor Importance ◽  
Mineral Soils

The effect of liming on the soil phosphorus fractions was studied under the laboratory conditions. 28 samples of mineral soils (pH in 0.01 M CaCl2 suspension 4.0 to 6.0) were incubated with 1 per cent CaCO3 or without lime for six months at about 18—20°C. In an other experiment, six samples (pH from 3.3 to 4.3) were incubated with 0, 0.5, 1, or 2 per cent CaCO3 also for six months. At the end of the incubation period the soil pH in the limed samples of the first experiment ranged from pH 5.9 to pH 7.5, in the second experiment the highest application kept the soil pH at 6.5 to 7.0. In the air-dried samples the content of organic phosphorus and the fractions of inorganic phosphorus were determined, and the increases or decreases due to the incubation and liming were calculated. Incubation without lime brought about decrease in the organic phosphorus content of several samples, and the presence of lime tended to intensify this effect, although only in a few cases the decrease due to liming was statistically significant. Liming also tended to increase the accumulation of NH4F-soluble inorganic phosphorus. The acid-soluble fraction was often increased in the limed samples but not in the unlimed ones. The alkali-soluble fraction was decreased in most soils in the limed samples, while it increased in some of the unlimed ones. In the second experiment the incubation caused marked decrease in the alkali-soluble phosphorus without a corresponding increase in the other phosphorus fractions determined in the subsoil samples. It was concluded that in these experiments the relatively heavy liming in the first place affected the distribution of inorganic phosphorus increasing the NH4F-soluble and acid-soluble forms at the expense of the alkali-soluble fraction. The effect on the mineralization of organic phosphorus seemed to be in most soils of minor importance.

Relation Between Moult Cycle and Phosphorus Content of Blood and Muscle in Lobster

1943 ◽  
Vol 6b (2) ◽  
pp. 152-157 ◽  
Author(s):  
Andrew Hollett
Keyword(s):  
Total Phosphorus ◽  
Phosphorus Content ◽  
Inorganic Phosphorus ◽  
Average Concentration ◽  
Moult Cycle ◽  
Total Phosphorus Content

The concentration of inorganic and total phosphorus in lobster blood and muscle was determined. A wide variation in the phosphorus content of the blood was found, being highest immediately preceding the moult and lowest following it. The total phosphorus content of the muscle was relatively constant throughout the moult cycle, with an average concentration of 0.28 per cent, of which about 58 per cent was inorganic phosphorus.

MINERALIZATION OF SOIL ORGANIC PHOSPHORUS WITH PARTICULAR REFERENCE TO THE EFFECT OF LIME

1963 ◽  
Vol 43 (1) ◽  
pp. 97-106 ◽  
Author(s):  
R. L. Halstead ◽  
J. M. Lapensee ◽  
K. C. Ivarson
Keyword(s):  
Phosphorus Content ◽  
Organic Phosphorus ◽  
Acid Soils ◽  
Inorganic Phosphorus ◽  
Eastern Canada ◽  
Surface Samples ◽  
Soil Organic Phosphorus ◽  
Repressive Effect ◽  
Partial Sterilization ◽  
Positive Effect

In a laboratory experiment, liming resulted in an average decline of 3.6 per cent in the total organic phosphorus content of incubated surface samples of seven acid soils from eastern Canada. Increases of 2.6 and 5.1 per cent in 1N H2SO4- and 4N HCl-soluble inorganic phosphorus, respectively, and a decrease of 46.4 per cent in NaHCO3-soluble organic phosphorus (pH 8.5) provided further evidence of mineralization of organic phosphorus following liming. There was some evidence, however, that the differences in NaHCO3-soluble organic phosphorus following liming were due only in part to mineralization, since Ca(OH)2 added to a soil just prior to extraction with NaHCO3 had a repressive effect on the solubility of the organic phosphorus compounds.Some mineralization of organic phosphorus occurred when unlimed samples were incubated in the laboratory for 9 months.Marked increases in microbiological activity, as indicated by increased numbers of microorganisms, and increased CO2 and NO3-nitrogen production, were associated with lower values for extractable organic phosphorus following liming. Partial sterilization of samples with toluene lowered biological activity in the unlimed and limed samples. Toluene was found, however, to have a positive effect on release of phosphorus from organic form.

Sign in / Sign up

Export Citation Format

Share Document