Zobrazeno 1 - 10
of 69
pro vyhledávání: '"Burt W. Heywang"'
Autor:
Burt W. Heywang
Publikováno v:
Poultry Science. 25:547-553
THE data of Heywang (1944) show that no increase in their egg production or feed consumption, or better maintenance of their weight, resulted from subjecting laying pullets to artificial light, either from midnight to daylight or all night, during ho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e62d58776efb3e129cc9709a59c9021
https://doi.org/10.3382/ps.0250547
https://doi.org/10.3382/ps.0250547
Autor:
Burt W. Heywang, Richard W. Lowe
Publikováno v:
Poultry Science. 40:177-180
TOMHAVE (1954) compared the performance of October hatched New Hampshire pullets subjected to normal daylight with that of others receiving supplemental artificial light to simulate day-length of pullets hatched in March. The length of supplemental l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d27c099374697595442a68cc3d8b9f23
https://doi.org/10.3382/ps.0400177
https://doi.org/10.3382/ps.0400177
Publikováno v:
Poultry Science. 31:35-39
THE contrasting results of experiments by two different groups of investigators indicate the instability of pure gossypol in mixed diets. Boatner and co-workers (1948) reported that pure gossypol did not greatly retard the growth of young chickens wh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f07e29787903237088be637c800ddbf7
https://doi.org/10.3382/ps.0310035
https://doi.org/10.3382/ps.0310035
Autor:
Burt W. Heywang
Publikováno v:
Poultry Science. 21:521-524
APPARENTLY there are no published data on the effect of the fat content of the diet of laying chickens on the hatchability of their eggs. In order to obtain information on this subject the writer conducted two experiments, in each of which diets of d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::983fac23a5d3835b8e8345b510788292
https://doi.org/10.3382/ps.0210521
https://doi.org/10.3382/ps.0210521
Autor:
Burt W. Heywang, Morley A. Jull
Publikováno v:
Poultry Science. 9:393-404
It has long been established that the chick at hatching time usually has a certain amount of yolk material that has not been assimilated. Since the rate of assimilation of yolk material during embryonic development determines the relatitve amount of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e7e6433347718ee16a02321f2cab8895
https://doi.org/10.3382/ps.0090393
https://doi.org/10.3382/ps.0090393
Autor:
Burt W. Heywang
Publikováno v:
Poultry Science. 19:201-204
APPARENTLY it is commonly believed by commercial poultrymen that the drinking water given to young chicks should be warm, or at least not real cold. That belief is fostered by statements similar to the following which appears in a booklet prepared fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce461828a55f8b245322c9bd32f8cebf
https://doi.org/10.3382/ps.0190201
https://doi.org/10.3382/ps.0190201
Publikováno v:
Poultry Science. 28:610-617
FEW experiments have been conducted to determine the value of cottonseed meal in the diets of laying chickens, probably because it is known that it contains substances responsible for olive-colored yolks and pink yolks and whites in stored eggs. It i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a8c31eb9bd5e984c7a9c3dc99672347b
https://doi.org/10.3382/ps.0280610
https://doi.org/10.3382/ps.0280610
Autor:
Burt W. Heywang
Publikováno v:
Poultry Science. 38:854-858
DIFFERENT workers disagree about the effect of antibiotics on healthy laying chickens in a temperate climate. The data of Heywang (1956 Heywang (1957b), however, are apparently the only published ones showing that chlortetracycline at the levels of 5
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2104a590b69a5196e4158b429a7bb47b
https://doi.org/10.3382/ps.0380854
https://doi.org/10.3382/ps.0380854
Autor:
Burt W. Heywang
Publikováno v:
Poultry Science. 17:240-247
THE sequence in the time of laying of successive eggs in clutches of various sizes is used as a test of the accuracy of trap-nest records by inspectors in poultry record of performance work. Atwood (1929) observed that there was a high degree of regu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bd449ca6b589b4ecf1a1e8e176e44499
https://doi.org/10.3382/ps.0170240
https://doi.org/10.3382/ps.0170240
Publikováno v:
Poultry Science. 33:763-767
THERE is experimental evidence that two components of cottonseed cause egg yolk discolorations. One of these components is gossypol. The identity of the other is unknown, but it causes “pink” albumen and yolk discolorations different from those c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5db92d28fdeb6bf1acfaddfc6255fa97
https://doi.org/10.3382/ps.0330763
https://doi.org/10.3382/ps.0330763