000			02983cam a2200349 a 4500
003			EG-GiCUC
005			20250223031549.0
008			160924s2016 ua d f m 000 0 eng d
040			_aEG-GiCUC _beng _cEG-GiCUC
041	0		_aeng
049			_aDeposite
097			_aPh.D
099			_aCai01.07.03.Ph.D.2016.Sh.E
100	0		_aSherien Abdelrahman Yassien Ali
245	1	0	_aEffect of climate change on milk production of holstein cows maintained in the Nile Delta of Egypt / _cSherien Abdelrahman Yassien Ali ; Supervised Rabie Ragab Sadek , Ali Attia Nigm , Mohamed Abdelaziz Elwardani
246	1	5	_aتأثير التغيرات المناخية على إنتاج اللبن فى أبقار الهولشتين المُرباة فى دلتا النيل بمصر
260			_aCairo : _bSherien Abdelrahman Yassien Ali , _c2016
300			_a56 P. : _bcharts ; _c25cm
502			_aThesis (Ph.D.) - Cairo University - Faculty of Agriculture - Department of Animal Production
520			_aThe main objective of the study was to monitor the current and future climate changes and to evaluate their effects on milk yield of Holstein cattle in the Delta of Egypt. This thesis includes two studies, the first was conducted to evaluate the effect of current climate changes on milk yield. Data of test-day milk yield (TDMY) comprised 109759 records, were collected from four herds (5546 Holstein cows). The four herds represented different parts of the Delta region: west of the Delta (Dina farm, included two h erds, H1 and H2), east (Sami Asaad farm, H3) and middle of Delta (El-Karada farm, H4). Meteorological data (monthly air temperature and relative humidity) throughout the period from 2000 to 2014, and their expected corresponding values in the two years 2025 and 2050 were obtained from the Central Laboratory for Agricultural Climate. Analysis of meteorological data revealed a significant increase in temperature- humidity index (THI) values, and confirmed a marked change in climate starting the year 2011. So, the study period (2000-2014) was devided into two periods: the first was with almost a constant value of THI (2000-2011), and the second with a higher value (2012- 2014). All the factors (Herd, Parity, THI, Period and all interactions among factors ) showed a highly significant effect (P<0.0001) on TDMY. Test-day milk yield decreased (P<0.05) when THI was >74. Test-day milk yield, also decreased (P<0.05) in the second period. Test- day milk yield was 24.2 and 22.8kg for the first and second period, respectively. This d
530			_aIssued also as CD
653		4	_aClimate change
653		4	_aHolstein
653		4	_aTest-day milk yield
700	0		_aAli Attia Nigm , _eSupervisor
700	0		_aMohamed Abdelaziz Elwardani , _eSupervisor
700	0		_aRabie Ragab Sadek , _eSupervisor
856			_uhttp://172.23.153.220/th.pdf
905			_aNazla _eRevisor
905			_aSoheir _eCataloger
942			_2ddc _cTH
999			_c57832 _d57832