Effect of dietary phosphorus content on milk production and phosphorus excretion in dairy cows

Wang, Chong; Liu, Zhen; Wang, Diming; Liu, Jianxin; Liu, Hongyun; Wu, Zhiguo

doi:10.1186/2049-1891-5-23

Cited by 19 publications

(9 citation statements)

References 18 publications

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“…The average protein concentration of 34 g/kg for milk met the minimum Indonesian requirement of 27 g/kg milk [ 25 ]. The average N concentration of 24 g/kg DM for the faeces was within the range of 22 to 26 g/kg DM as found in literature [ 26 , 27 ] and the P concentration of 7 g/kg DM for the faeces was in the range of 5.2 to 7.4 g/kg DM as found in literature [ 28 ].…”

Section: Resultssupporting

confidence: 80%

Predicting nutrient excretion from dairy cows on smallholder farms in Indonesia using readily available farm data

Zahra

Middelaar

Boer

et al. 2020

Asian-Australas J Anim Sci

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Objective: This study was conducted to provide models to accurately predict nitrogen (N) and phosphorus (P) excretion of dairy cows on smallholder farms in Indonesia based on readily available farm data.Methods: The generic model in this study is based on the principles of the Lucas equation, describing the relation between dry matter intake (DMI) and faecal N excretion to predict the quantity of faecal N (QFN). Excretion of urinary N and faecal P were calculated based on National Research Council recommendations for dairy cows. A farm survey was conducted to collect input parameters for the models. The data set was used to calibrate the model to predict QFN for the specific case. The model was validated by comparing the predicted quantity of faecal N with the actual quantity of faecal N (QFNACT) based on measurements, and the calibrated model was compared to the Lucas equation. The models were used to predict N and P excretion of all 144 dairy cows in the data set.Results: Our estimate of true N digestibility equalled the standard value of 92% in the original Lucas equation, whereas our estimate of metabolic faecal N was –0.60 g/100 g DMI, with the standard value being –0.61 g/100 g DMI. Results of the model validation showed that the R2 was 0.63, the MAE was 15 g/animal/d (17% from QFNACT), and the RMSE was 20 g/animal/d (22% from QFNACT). We predicted that the total N excretion of dairy cows in Indonesia was on average 197 g/animal/d, whereas P excretion was on average 56 g/animal/d.Conclusion: The proposed models can be used with reasonable accuracy to predict N and P excretion of dairy cattle on smallholder farms in Indonesia, which can contribute to improving manure management and reduce environmental issues related to nutrient losses.

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Section: Resultssupporting

confidence: 80%

Predicting nutrient excretion from dairy cows on smallholder farms in Indonesia using readily available farm data

Zahra

Middelaar

Boer

et al. 2020

Asian-Australas J Anim Sci

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“…Samples were dried in a forced oven at 55°C for 48 h and then milled through a Wiley mill with1-mm screen, and analyzed for crude protein (CP), Ca, P, ash, ether extract ( AOAC, 1990 ), fecal water soluble P ( Dou et al, 2002 ), neutral detergent fiber (NDF; Van Soest et al, 1991 ), acid detergent fiber (ADF; Van Soest et al, 1991 ). Spot fecal and urinary samples collected at 07:00, 14:30, and 20:30 h on the d 3, 27, and 53 were mixed across hours with a day as described by Wang et al (2014) , and sampled for later analysis. The record of hip height, body high, body length, heart girth, and teat length were taken at the d 2, 26, and 52.…”

Section: Methodsmentioning

confidence: 99%

The Effects of Dietary Phosphorus on the Growth Performance and Phosphorus Excretion of Dairy Heifers

Zhang

Wang

Wei

et al. 2015

Asian Australas. J. Anim. Sci

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The objective of this study was to investigate the effects of reducing dietary phosphorus (P) on the frame size, udder traits, blood parameters and nutrient digestibility coefficient in 8- to 10-month-old Holstein heifers. Forty-five heifers were divided into 15 blocks according to the mo of age and were randomly assigned one of three dietary treatments: 0.26% (low P [LP]), 0.36% (medium P [MP]), or 0.42% (high P [HP]) (dry matter basis). Samples were collected at the wk 1, 4, 8. The results show that low dietary P had no effect on body measurement. The blood P concentration decreased with decreasing dietary P (p<0.05), while the blood calcium content of LP was higher than that of the MP and HP groups (p<0.05), though still in the normal range. The serum contents of alkalinephosphatase, potassium, and magnesium were similar among the treatments. No differences were found in all nutrients’ apparent digestibility coefficients with varied dietary P. However, with P diet decreased from HP to LP, the total fecal P and urine P concentration declined significantly, as did fecal water soluble P (p<0.05). In conclusion, reducing the dietary P from 0.42% to 0.26% did not negatively affect the heifers’ growth performance but did significantly lessen manure P excretion into the environment.

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“…NRC (2001) has revised the recommendation for dairy cattle from 0.3 to 0.4%. Increasing the concentration of dietary P above requirement (more than 0.38-0.40%) to 0.6% had no effect on estrus, service and conception (Lammoglia et al, 1997;Wang et al, 2014). Level of serum inorganic P ranged 4.32 to 7.12 mg/100 ml with a mean of 6.31 mg/100 ml in Mehsani buffaloes (Pande et al, 1978), and 5.369, 3.261 and 2.030 mg/100 ml during follicular phase, luteal phase and postpartum anestrus period in rural buffaloes (Umesh et al, 1995).…”

Section: Calcium and Phosphorusmentioning

confidence: 99%

Effect of Combined Phosphorus Preparation (Tonophosphan) on Ovarian Activity of Egyptian Buffaloes.

Abo-Farw¹,

Elmaghraby

Nagy

et al. 2017

Journal of Animal and Poultry Production

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The aims of this study was to evaluate the effect of tonophosphan (TPH), as a phosphorous compound, on resumption of estrus and ovulatory activity of anestrous Egyptian buffalo heifers and anestrous post-partum buffalo cows, in relation with blood phosphorus level. Total of 24 anestrus animals with smooth ovaries and serum progesterone of <1 ng/ml up to 90 days postpartum (12 buffalo cows, weighing 470-530 kg, aging 5-7 years and between 3-4 parities. as well as 12 buffalo heifers, weighing 390-420 kg and 2.5-3 years old) were used in this study. In each of heifer and cow groups (n=12), animals were randomly divided into two subgroups (treated and control, 6 in each). Animals in treatment group (6 heifers and 6 cows) were injected twice at 7 day-interval with 4 ml/100 kg of TPH, while those in control group (6 heifers and 6 cows) were administrated with 4 ml distilled water/100 kg at the same time of TPH treatment. Estrous activity was detected twice daily to detect estrous signs. Blood samples were collected from all animals of each group on days 0, 3, 6, 10, 14, 18, 22, 26, 30, 34 and 38 of treatment. Results revealed that the estrus rate in treated animals was higher (P<0.05) in cows (83.33%) than in heifers (66.67%), while the control animals showed no estrous signs. Intensity, duration and interval from treatment to estrus were nearly similar in both heifers and cows. Concentration of serum P4 was higher (P<0.05) in cows than in heifers only on days 3 and 6 of treatment, while it was higher (P≥0.05) in cows than in heifers on other sampling days. Concentration of P4 was higher (P<0.05) in treated groups than in control on all sampling days, except during the 1 st and six days of treatment. Concentration of P4 was less than 1 ng/ml in control groups on all sampling treatment days, while P4 concentration level was ≥1 ng/ml after 10 days of treatment in treated groups. Concentration of Ca on most sampling days of treatment and P concentration on all sampling days were significantly (P<0.05-P<0.001) higher in heifers than in cows, while Ca:P ratio showed an opposite trend on all sampling days. In conclusion, Based on the foregoing results, twice tonophodphan injection of true anestrous buffalo heifers and cows at a week interval at a level of 4 ml/100 kg LBW has impact on resumption of estrous activity and achieving conception, being more effective for buffalo cows than for buffalo heifers.

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Effect of dietary phosphorus content on milk production and phosphorus excretion in dairy cows

Cited by 19 publications

References 18 publications

Predicting nutrient excretion from dairy cows on smallholder farms in Indonesia using readily available farm data

Predicting nutrient excretion from dairy cows on smallholder farms in Indonesia using readily available farm data

The Effects of Dietary Phosphorus on the Growth Performance and Phosphorus Excretion of Dairy Heifers

Effect of Combined Phosphorus Preparation (Tonophosphan) on Ovarian Activity of Egyptian Buffaloes.

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