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Orchardgrass 초지의 생산성 및 예취관리에 관한 연구 4 . 산지초지 사초의 무기물함량과 grass tetany 위험성
전우복(Woo Bock Chun),정완태(Wan Tae Chung) 한국축산학회 1988 한국축산학회지 Vol.30 No.6
Mineral contents of grasses in Chonnam mountain pasture were investigated during growing season in 1986 and 1987 to study the nutritional problems on the cattle disease of hypomagnesemia (grass tetany). Grass samples of the first, second, third and fourth cuts were analyzed for Ca, Mg, K, Na and P concentration. Results obtained were as follows. 1. Mean concentration of Mg and K in grasses was about 0.3% and 4.65%, respectively and equivalent ratio of K/Ca+Mg was about 2.13. Critical and abnormal levels of minerals incident to induce grass tetany were found in grass samples of mountain pasture. 2. Especially, the high rate of abnormal and critical K/Ca+Mg ratio of the grasses in mountain pasture was due to the high K level of the soil 3. The Ca/P ratio of grasses was about 2.78 and high amount of P fertilizer should be applied to maintain the optimum Ca/P ratio in grasses.