scholarly journals Effects of temperature on the nitrogen and phosphorus excretion of Corbicula fluminea

2014 ◽  
Vol 26 (6) ◽  
pp. 864-870
Author(s):  
XUE Qingju ◽  
◽  
CAI Yongjiu ◽  
XU Hao ◽  
GONG Zhijun
SpringerPlus ◽  
2014 ◽  
Vol 3 (1) ◽  
pp. 455 ◽  
Author(s):  
Bai-cai Xiao ◽  
Er-chao Li ◽  
Zhen-yu Du ◽  
Run-lan Jiang ◽  
Li-qiao Chen ◽  
...  

2017 ◽  
Vol 95 (8) ◽  
pp. 3487-3496
Author(s):  
Q. B. Qu ◽  
P. Yang ◽  
R. Zhao ◽  
S. L. Zhi ◽  
Z. W. Zhai ◽  
...  

2013 ◽  
Vol 91 (6) ◽  
pp. 2542-2554 ◽  
Author(s):  
R. Saintilan ◽  
I. Mérour ◽  
L. Brossard ◽  
T. Tribout ◽  
J. Y. Dourmad ◽  
...  

2003 ◽  
Vol 83 (4) ◽  
pp. 749-754 ◽  
Author(s):  
Z. Zhang ◽  
C. M. Nyachoti ◽  
S. Arntfield ◽  
W. Guenter ◽  
S. Cenkowski

The effect of micronization of peas and enzyme supplementation on performance, nitrogen and phosphorus excretion as well as manure output was investigated in a study with 12 Cotswold gilts (26.9 ± 3.6 kg initial body weight). Three diets based on barley-raw peas (control), barley-micronized peas, or barley-micronized peas plus a multi-enzyme blend were used. The study was conducted in two blocks and within a block; each diet was randomly assigned to four pigs to give a total of eight observations per diet. Pigs fed micronized peas and micronized peas plus enzyme diets had higher (P < 0.05) feed conversion than the control. Compared with the control, micronization of peas reduced (P < 0.05) wet and dry fecal output by 33 and 25%, respectively. Urine volume was not influenced (P > 0.05) by dietary treatment. Total fecal phosphorus excretion was lower (P < 0.001) in gilts fed the micronized peas or micronized peas plus enzyme diets compared with the control. Micronization of peas reduced (P < 0.05) total nitrogen excretion in pig manure by 21.5% (17.39 vs. 13.65 g d-1). In conclusion, formulating pig grower diets with micronized peas improves nitrogen and phosphorus utilization and reduces total manure volume. Key words: Pigs, nitrogen, phosphorus, manure volume, micronized peas


1993 ◽  
Vol 8 (3) ◽  
pp. 128-132 ◽  
Author(s):  
Mark S. Honeyman

AbstractThe nutrient composition of swine excreta can be altered by manipulating the composition of the pig's diet Several approaches are reviewed: feeding according to the pig's growth phase, formulation according to the feed's digestible amino acids, use of crystalline amino acids, the ideal protein approach, formulation according to available phosphorus, and the addition ofphytase enzymes. Each has the potential to lower nitrogen or phosphorus excretion levels. Together they can dramatically reduce the nitrogen and phosphorus concentration of swine manure, which could be a major advantage in regions with a high density of swine or for swine operations with limited access to arable land. However, the value of the swine manure would be much less as a fertilizer because these two elements are important plant nutrients.


Author(s):  
E. I. Butler ◽  
E. D. S. Corner ◽  
S. M. Marshall

In a recent study (Butler, Corner & Marshall, 1969) it was found that the excretion of nitrogen and phosphorus in soluble form by Calanus finmarchicus caught at Garroch Head in the Clyde sea-area was significantly higher in spring when plant food was plentiful, than in autumn when plant food was in relatively short supply. The present survey has extended this earlier study to include more detailed data at all times of the year, particular attention being paid to the spring diatom increase of 1969 when plant food in the sea near Garroch Head rose above the level which Beklemishev (1962) regards as inducing superfluous feeding, a wasteful process partially involving the inefficient assimilation of foodstuffs (see ‘Discussion’, p. 549).


2009 ◽  
Vol 2008 (1) ◽  
pp. 179-194
Author(s):  
Jaap Van Milgen ◽  
Ludovic Brossard ◽  
Alain Valancogne ◽  
Jean-Yves Dourmad

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