Dietary calcium and phosphorus repletion of lambs

1990 ◽  
Vol 41 (2) ◽  
pp. 413 ◽  
Author(s):  
JH Ternouth ◽  
CC Sevilla
Keyword(s):  
Gastrointestinal Tract ◽  
Bone Resorption ◽  
Strong Correlations ◽  
P Deficiency ◽  
Inorganic P ◽  
Metatarsal Bones ◽  
P Content ◽  
Calcium And Phosphorus ◽  
Kinetics Of ◽  
Exchangeable P

Three-month-old Corridale lambs, confined in metabolism crates, were repleted with calcium or phosphorus or both Ca and P for 6 weeks (repletion diets HL, LH, HH, respectively, Ca 5.0 and P 3.7 g/kg) after being offered a low Ca and P (Ca 1.25 and P 0.66 g/kg) roughage-based diet (LL) for 12 weeks. At the end of the experiment, the Ca and P kinetics of the lambs was studied using a combination of balance studies and isotope techniques. The depletion diet substantially reduced the plasma P concentrations, DM intake and digestibility, liveweight gain, and Ca and P content of the bones. During repletion, lambs fed on the HL, LH and HH diets consumed minus16, 28 and 46% more DM than the lambs on the LL diet. The liveweight gains were 15.5, minus17.8, 41.1 and 134.5 g/day for lambs given diets LL, HL, LH and HH, respectively, during the repletion period. During the 6-week repletion period, there was complete remineralization of the rib bones of lambs fed on diet HH, but only partial remineralization of the metatarsal bones. The results indicated the need to feed supplementary Ca as well as P during dietary mineral repletion. The DM digestibilities of the lambs fed on the LL depletion diet did not improve during repletion. There were strong correlations between DM intake and plasma inorganic P, muscle P or exchangeable P pool, but not DM digestibility, suggesting that the reductions in feed intake with P deficiency are due to some effect on intermediary metabolism of the animal rather than on the gastrointestinal tract. When the lambs were repleted with diet HL, they had the highest Ca absorption coefficient, level of exchangeable body Ca, bone accretion of Ca and bone resorption of Ca. The LH repletion diet lambs had the highest rate and coefficient of absorption of P, but HH lambs had the highest levels of exchangeable body P, and rates of accretion and resorption of soft tissue and osseous P.

scholarly journals Phosphorus Status, Inorganic Phosphorus Forms, and Other Physicochemical Properties of Acid Soils of Farta District, Northwestern Highlands of Ethiopia

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Asmare Melese ◽  
Heluf Gebrekidan ◽  
Markku Yli-Halla ◽  
Birru Yitaferu
Keyword(s):  
Crop Production ◽  
Chemical Properties ◽  
Acid Soils ◽  
Inorganic Phosphorus ◽  
Strong Positive Correlation ◽  
P Deficiency ◽  
Inorganic P ◽  
Olsen P ◽  
Degree Of P Saturation ◽  
P Content

Soil acidity and low availability of P limit crop production in the highlands of Ethiopia. The objective of this study was to determine the P status, distribution and forms of inorganic P and relate them to selected chemical properties of eight representative acidic surface soil samples from Farta District. Soil pH (H2O) varied between 4.74 and 5.50. The moderate to high CEC suggests that besides kaolinite, the soils also contain expandable 2 : 1 clay minerals. Though the total P content was high, the available Olsen P content was very low or low in all soils except one. In most soils, the abundance of inorganic P fractions was as follows: P bound by oxalate extractable iron (Feox-P)>reductant soluble Fe-P>occluded Al-Fe-P>P bound by oxalate extractable aluminum (Alox-P)>calcium bound P (Ca-P). Olsen P had a very strong positive correlation (P≤0.01) withAlox-P (r=0.98),Feox-P (r=0.96), and oxalate extractable P (r=0.94). Though Fe bound P reserves were quite abundant and the degree of P saturation ofAlox+Feox(median 3.3%) was moderate, the extremely low P saturation ofAlox(median 0.5%) explains the P deficiency of the soils.

SORPTION OF CARBON AND PHOSPHORUS FROM LIQUID POULTRY MANURE BY SOIL AGGREGATES OF DIFFERING SIZE

1985 ◽  
Vol 65 (3) ◽  
pp. 467-473 ◽  
Author(s):  
V. K. BHATNAGAR ◽  
M. H. MILLER
Keyword(s):  
Soil Aggregates ◽  
Poultry Manure ◽  
Aggregate Size ◽  
Liquid Manure ◽  
Inorganic P ◽  
Supernatant Liquid ◽  
Extractable P ◽  
P Content ◽  
Manure Slurry ◽  
Total P

A series of laboratory experiments was conducted to determine the mechanism(s) responsible for a previously reported observation that addition of liquid manure to soil increased the NaHCO3-extractable P (Ext-P) of large aggregates (> 2 mm) more than that of smaller aggregates whereas addition of an inorganic P solution did not. Application of liquid poultry manure increased the total P, Ext-P and total C concentrations in large aggregates (> 2 mm) much more (> 2.5 ×) than that in small aggregates (< 1 mm). Addition of inorganic P solution or of supernatant liquid from a centrifuged manure slurry increased the P content of the large aggregates only slightly (1.2 ×). A greater increase in Ext-P in large aggregates was observed even when the smaller aggregates were purposely layered on top of the larger ones prior to addition of the liquid manure. A similar but less pronounced effect of aggregate size on increase in P or C concentration was observed when different sized aggregates were left in contact with an effectively infinite source of liquid manure for 24 h. It is concluded that the larger aggregates absorbed more of the bulk manure slurry than smaller aggregates. A partial sealing of small aggregates by particulates is suggested as a possible mechanism. Key words: Carbon, phosphorus, liquid manure, soil aggregates

Relationship between phosphorus fractions and properties of highly calcareous soils

Soil Research ◽  
2007 ◽  
Vol 45 (4) ◽  
pp. 255 ◽  
Author(s):  
Ebrahim Adhami ◽  
Hamid Reza Memarian ◽  
Farzad Rassaei ◽  
Ehsan Mahdavi ◽  
Manouchehr Maftoun ◽  
...  
Keyword(s):  
Calcareous Soils ◽  
Hydroxylamine Hydrochloride ◽  
Inorganic Phosphorus ◽  
Influential Factor ◽  
Sequential Fractionation ◽  
Inorganic P ◽  
Soil P ◽  
Fractionation Procedure ◽  
Extractable P ◽  
P Content

Inorganic phosphorus (P) sequential fractionation schemes are applicable techniques to interpret soil P status. The present study was initiated to determine the origin of various P fractions in highly calcareous soils. Inorganic P forms were determined by a sequential fractionation procedure extracting with NaOH (NaOH-P), Na citrate-bicarbonate (CB-P), Na citrate 2 times (C1-P and C2-P), Na citrate-ascorbate (CAs-P), Na citrate-bicarbonate-dithionite (CBD-P), Na acetate (NaAc-P), and HCl (HCl-P). Results showed that NaOH-P was negatively correlated with active iron oxides. CB-P was positively correlated with silt content and negatively related to citrate-bicarbonate-dithionite extractable Fe (Fed). This result illustrates the weathering effect on Ca-P, with Ca-P content declining as a consequence of weathering. A negative correlation was observed between C1-P and citrate ascorbate extractable Fe (FeCAs). Second citrate extractable P (C2-P) was negatively related to calcium carbonate equivalent and positively related to hydroxylamine-hydrochloride and neutral ammonium acetate-hydroquinone extractable Mn (Mnh and Mnq). Fine silt (Fsilt) was the most influential factor affecting CAs-P. It seemed citrate-dithionite-bicarbonate extractable Al (Ald), Mnh, and Mnq have been sinks for CBD-P, while free iron oxide compounds (Feo, Fec, and FeCAs) were a major contributing factor for the formation of NaAc-P. Stable P compounds (HCl-P) of highly calcareous soils originated from coarse silt (Csilt) and hydroxylamine-hydrochloride extractable Mn (Mnh).

Comparative in vitro fermentation activity in the canine distal gastrointestinal tract and fermentation kinetics of fiber sources

2008 ◽  
Vol 86 (11) ◽  
pp. 2979-2989 ◽  
Author(s):  
G. Bosch ◽  
W. F. Pellikaan ◽  
P. G. P. Rutten ◽  
A. F. B. van der Poel ◽  
M. W. A. Verstegen ◽  
...  
Keyword(s):  
Gastrointestinal Tract ◽  
In Vitro Fermentation ◽  
Fermentation Kinetics ◽  
Kinetics Of

scholarly journals More Bone with Less Minerals? The Effects of Dietary Phosphorus on the Post-Cranial Skeleton in Zebrafish

2020 ◽  
Vol 21 (15) ◽  
pp. 5429
Author(s):  
Silvia Cotti ◽  
Ann Huysseune ◽  
Wolfgang Koppe ◽  
Martin Rücklin ◽  
Federica Marone ◽  
...  
Keyword(s):  
Growth Retardation ◽  
Bone Matrix ◽  
X Rays ◽  
Zebrafish Model ◽  
P Deficiency ◽  
Vertebral Centra ◽  
Dietary Phosphorus ◽  
P Content ◽  
Wide Range ◽  
Complementary Techniques

Dietary phosphorus (P) is essential for bone mineralisation in vertebrates. P deficiency can cause growth retardation, osteomalacia and bone deformities, both in teleosts and in mammals. Conversely, excess P supply can trigger soft tissue calcification and bone hypermineralisation. This study uses a wide range of complementary techniques (X-rays, histology, TEM, synchrotron X-ray tomographic microscopy, nanoindentation) to describe in detail the effects of dietary P on the zebrafish skeleton, after two months of administering three different diets: 0.5% (low P, LP), 1.0% (regular P, RP), and 1.5% (high P, HP) total P content. LP zebrafish display growth retardation and hypomineralised bones, albeit without deformities. LP zebrafish increase production of non-mineralised bone matrix, and osteoblasts have enlarged endoplasmic reticulum cisternae, indicative for increased collagen synthesis. The HP diet promotes growth, high mineralisation, and stiffness but causes vertebral centra fusions. Structure and arrangement of bone matrix collagen fibres are not influenced by dietary P in all three groups. In conclusion, low dietary P content stimulates the formation of non-mineralised bone without inducing malformations. This indicates that bone formation and mineralisation are uncoupled. In contrast, high dietary P content promotes mineralisation and vertebral body fusions. This new zebrafish model is a useful tool to understand the mechanisms underlying osteomalacia and abnormal mineralisation, due to underlying variations in dietary P levels.

scholarly journals Estimating the importance of maize root hairs in low phosphorus conditions and under drought

2019 ◽  
Vol 124 (6) ◽  
pp. 961-968 ◽  
Author(s):  
Florian Klamer ◽  
Florian Vogel ◽  
Xuelian Li ◽  
Hinrich Bremer ◽  
Günter Neumann ◽  
...  
Keyword(s):  
Root Hairs ◽  
Specific Root Length ◽  
P Uptake ◽  
Alkaline Soil ◽  
Secondary Effects ◽  
Short Root ◽  
P Deficiency ◽  
P Content ◽  
Low Phosphorus ◽  
P Supply

Abstract Background and Aims Root hairs are single-cell extensions of the epidermis that face into the soil and increase the root–soil contact surface. Root hairs enlarge the rhizosphere radially and are very important for taking up water and sparingly soluble nutrients, such as the poorly soil-mobile phosphate. In order to quantify the importance of root hairs for maize, a mutant and the corresponding wild type were compared. Methods The rth2 maize mutant with very short root hairs was assayed for growth and phosphorus (P) acquisition in a slightly alkaline soil with low P and limited water supply in the absence of mycorrhization and with ample P supply. Key Results Root and shoot growth was additively impaired under P deficiency and drought. Internal P concentrations declined with reduced water and P supply, whereas micronutrients (iron, zinc) were little affected. The very short root hairs in rth2 did not affect internal P concentrations, but the P content of juvenile plants was halved under combined stress. The rth2 plants had more fine roots and increased specific root length, but P mobilization traits (root organic carbon and phosphatase exudation) differed little. Conclusions The results confirm the importance of root hairs for maize P uptake and content, but not for internal P concentrations. Furthermore, the performance of root hair mutants may be biased by secondary effects, such as altered root growth.

Phosphorus homoeostasis in grazing breeder cattle

1997 ◽  
Vol 128 (3) ◽  
pp. 331-337 ◽  
Author(s):  
J. H. TERNOUTH ◽  
D. B. COATES
Keyword(s):  
Dry Matter ◽  
Late Pregnancy ◽  
Growing Season ◽  
Early Lactation ◽  
Data Set ◽  
Inorganic P ◽  
Growing Cattle ◽  
Negative Balance ◽  
Kinetics Of ◽  
P Absorption

The phosphorus (P) balances and 32P kinetics of 15 Droughtmaster heifers were studied in mid and late pregnancy and early and late lactation to compare their P absorption coefficients and their P endogenous faecal losses with those of growing cattle. The heifers continuously grazed three paddocks of tropical pasture for a year to provide a range of P intakes.The daily dry matter (DM) and P intakes of the heifers were generally much higher during lactation (17–26 g DM/kg LW and 11–40 mg P/kg LW) than during pregnancy (10–16 g DM/kg LW and 6–22 mg P/kg LW), due in part to the heifers calving at the beginning of the wet (pasture growing) season. Plasma inorganic P levels decreased as the experiment progressed and were very low (<30 mg/l) in all treatments in late lactation. Milk and milk P secretion were high in early lactation (4·0–5·5 l/day and 12–16 mg P/kg LW per day) so the heifers were in more negative balance during lactation than during pregnancy.The coefficient of P absorption was similar to that previously observed in growing cattle consuming forage diets and it was concluded that 0·75 was the appropriate value to use in the estimation of requirements. Endogenous faecal losses ranged from 7 to 17 mg/kg LW and were related to P intake or DM intake plus plasma inorganic P. Comparison of the regressions with those from the larger data set for growing cattle showed that the endogenous faecal losses were similar and there were no special faecal endogenous losses in breeding cattle.

Release Kinetics of Phosphorus in Sediments from Baihua Lake

2012 ◽  
Vol 599 ◽  
pp. 91-95 ◽  
Author(s):  
Jin Mei ◽  
Ji Wei Hu ◽  
Xian Fei Huang ◽  
Li Ya Fu ◽  
Jin Luo ◽  
...  
Keyword(s):  
Organic Phosphorus ◽  
Release Kinetics ◽  
Phosphorus Release ◽  
Release Kinetic ◽  
Iron Aluminum ◽  
P Content ◽  
Elovich Equation ◽  
Release Data ◽  
The Relationship ◽  
Kinetics Of

Release kinetics of phosphorus in 17 sediments samples collected from Baihua Lake were determined, and the relationship between the phosphorus release kinetic parameters and the sediment composition was also investigated. The results showed that both the Elovich equation and power function equation were valid models for describing the phosphorus release data in the 17 sediments. Within the beginning 12 h, the rate of phosphorus release was high, and then decreased. Our correlation analysis demonstrates that there were no significant correlations between the maximum capacity of phosphorus release (Qmax) and the content of total nitrogen (TN), organic matter (OM), calcium-bound phosphorus (Ca-P), and organic phosphorus (OP). But the correlation between Qmax and iron/aluminum-bound phosphorus (Fe/Al-P) content was positive (R2 = 0.6064, P < 0.01), suggesting that Fe/Al-P might be the main contributor to the released phosphorus in the sediments.

Effect of Soil Available Phosphorus Levels on Chickpea (Cicer arietinum L.) - Rhizobia Symbiotic Association

2020 ◽  
Author(s):  
Khadraji Ahmed ◽  
Bouhadi Mohamed ◽  
Ghoulam Cherk
Keyword(s):  
Cicer Arietinum ◽  
Available P ◽  
Phosphorus Concentration ◽  
Available Phosphorus ◽  
Symbiotic Association ◽  
P Deficiency ◽  
Soil P ◽  
P Content ◽  
Nodule Biomass ◽  
Soil Available P

Background: Growing chickpea (Cicer arietinum) plants is affected by several environmental constraints as osmotic stress and nutrients deficiency particularly phosphorus (P). For other legume species, it was confirmed that P deficiency affects negatively their rhizobial symbiosis. The purpose of this study was to assess the effect of soil available P level on chickpea-rhizobia symbiosis under field conditions at Oualidia region of Morocco. Methods: Ten farmers’ fields with different soil available P levels were considered to carry out this study based on samples of 10 plants per plot. Result: The results showed that the plants from soil 7, with the lowest pH and the highest available P level (23.52ppm), presented high shoot dry weight (38.3 g/plant). Meanwhile the soil 5 with the lowest available P content showed low plant growth. The shoot P content was positively linked to soil P level but nodule biomass showed an irregular variation with soil available P level. Furthermore, it was confirmed that adequate plant P nutrition results in high chickpea yield and it was the case for plants from soil 7 presenting a mean yield of 62 seeds per plant). Finally, strong correlation was noted between yield and phosphorus concentration in soil (r=0.94).

ORGANIC AND INORGANIC P CONTENT, MOVEMENT AND MINERALIZATION OF P IN SOIL BENEATH A FEEDLOT

1975 ◽  
Vol 55 (4) ◽  
pp. 457-466 ◽  
Author(s):  
L. B. CAMPBELL ◽  
G. J. RACZ
Keyword(s):  
Field Capacity ◽  
Organic P ◽  
Field Soil ◽  
Inorganic P ◽  
Sample Depth ◽  
Extractable P ◽  
P Content ◽  
Field Samples ◽  
Adjacent Field ◽  
Depth Water

Greater amounts of 0.5 M NaHCO3 and water-extractable P were found in soil beneath a cattle feedlot located on an alkaline sandy soil than in soil in an adjacent non-manured field. The 0.5 M NaHCO3-extractable P contents of the feedlot soil samples were greater than for the adjacent field to a depth of 120–150 cm, suggesting that P from the manure had moved to this depth. Water extracted very little P from all field samples and the feedlot samples obtained below 120 cm. Concentration of total P in the feedlot soil was usually greater than in the corresponding field soil. The field soil contained more organic P than the feedlot soil at depths of 0–90 cm. Organic P concentrations at the 0 to 15-cm depths were 268 and 56 ppm for the field and feedlot sites, respectively. The organic C:N:P ratios for the 0 to 15-cm feedlot and field samples were 214:18:1 and 132:8.7:1, respectively. Mineralization of organic P in laboratory experiments was greater in flooded soils than in soils maintained at field capacity. Rates of mineralization were greater for manured than for non-manured samples. Organic and inorganic P moved at about equal rates in soil treated with manure extract. Rates of movement of both decreased with increasing sample depth in the feedlot soil. The feedlot soil below 30 cm and the field soils exhibited a high potential for inorganic and organic P fixation. Organic and inorganic P applied as manure extract moved faster than an equivalent concentration of P as KH2PO4.

Sign in / Sign up

Export Citation Format

Share Document