This experiment was conducted to determine the effect of varieties and quality of winter crop on palatability of calves for two years. Four Italian ryegrass variety(Kospeed, Kogreen, Kowinearly and Hwasan 101ho), two barley(Youngyang, Yuyeon), and a rye (Winter green) were cultivated at experimental field of National Institute of Animal Science, Cheonan. Four early varieties(Kospeed, Kogreen, Kowinearly and Winter green)were harvested at 20th Dry matter yield of "Hwasan 101 ho" was l8,629㎏/㏊(12,141 + 6,488) and Yeongyang, Youyeon and Winter green were 14,182, 12,487 and 10,935㎏/ha, respectively. Moisture content of Hwasan 101 ho was 81.5% in harvesting time, but wilting for 24 hours might bedecrease moisture content by 65.5%. The relative intake of Hwasan 101 ho, Kowinearly, Kospeed and Kogreen were 34.5, 60, 19.8, 15.7%, respectively. Among forage crop species, relative intake of Italian ryegrass(Hwasan 101 ho), barley(Yeongyang and Youyeon), and Rye(Winter green) were 43.1, 20.9, 20.5 and 15.5%, respectively.

축산 경영에 문제가 되는 가축분뇨의 효율적 경지환원을 모색하기 위해 본 시험을 수행하였다. 우리나라에서 발생량이 가장 많은 돈분액비를 가축분뇨 환원의 장으로 유력한 초지에 시용하여, 화학비료를 절감하고, 토양과 환경에 악영향을 끼치지 않으며 장기적으로 시용할 수 있는 초지에서의 돈분액비 적정 시용량 구명시험 수행을 통해 얻어진 결과는 다음과 같다. 목초의 건물생산성은 화학비료구가 가장 높았으며, 돈분액비 시용구 중에서는 액비의 시용량이 높아질수록 건물생