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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Performance Test of Rice Combined Harvesters) ผู้เขียน: วิชา หมั่นทำการ*, Kastsunobu Gonno สื่อสิ่งพิมพ์:pdf AbstractField Performance Test in relation to accuracy of operation and cleaning efficiency of two different rice combined harvesters, a locally-made rice combined harvester and a Japanese head-feeding type combined harvester were tested. The locally-made rice combined harvester was tested at two speed ranging from low speed (0.464-0.482 m/s) and high speed (0.787-0.807 m/s). At low speed test, the total grain loss and cleaning efficiency were 3.75-5.963% and 87.93% respectively, compared with the high speed test, the total grain loss and cleaning efficiency being 4.848-8.009% and 89.43% respectively. The Japanese head-feeding type combined harvester was tested at four speed ranging from low speed (0.320-0.395 m/s), medium speed (0.612-0.693 m/s), high speed (0.81-0.835 m/s) and very high speed (1.00-1.063 m/s). It was shown that the most suitable speed of the machine was the high speed which it gave the lowest total grain loss of 3.995-4.747% and cleaning efficiency of 93.20%. |
หัวเรื่อง:การทดสอบสมรรถภาพการสืบพันธุ์และการเจริญเติบโตของพ่อพันธุ์โคเนื้อลูกผสม (1/2 ชาโรเล่ย์ 1/4 บราห์มัน และ 1/4 พื้นเมือง) เพื่อปรับปรุงประสิทธิภาพการผลิตโคเนื้อในประเทศไทย สื่อสิ่งพิมพ์:pdf AbstractBull reproductive performance test of Crossbred beef cattle (1/2 Charolais ? Brahman ? Native) using an Andrological examination parameters was performed at Kamphangsaen Campus Kasetsart University throughout the period of 5 years. By using an Andrological and Breeding hygiene parameters testing method for the Crossbred bull at the age of 6 months up to 36 months, the testing results revealed that very high correlation (R2 =0.89) between scrotal circumference and growth traits in young bulls, an average of daily gain weight at preweaning age was 788.33+ 101.52 gram and the superior quality of 6 tested bull semen by using Andrological examination paprameters such as the average of conception rate and after thawing motility of frozen semen were 59.43 and 40%, respectively. All of these tested bulls could be served as superior genetic resources for further genetic merit propagation through AI method to encourage the beef production efficiency of small farms. |