Festulolium braunii (Festuca pratensis Huds. × Lolium multiflorum Lam.)를 조합한 혼파초지의 건물수량 및 사료가치 비교

A Comparison of Dry Matter Yield and Nutritive Value in the Mixture Swards associated with Festulolium braunii(Festuca pratensis Huds. × Lolium multiflorum Lam.)

본 시험은 충남대학교 농과대학 초지시험포장에서 1996년 9월부터 1998년 12월까지 속간교잡종인 Festulolium braunii (Paulita)의 혼파가능성을 타진하고자, A(control);orchardgrass(seeding rate 60%) + tall fescue 20% + Kentucky bluegrass 10% + white clover 10%, B; orchardgrass 60% + tall fescue 20% + Festulolium braunii 10% + white clover 10%, C; orchardgrass 60% + Festulolium braunii 20% + Kentucky bluegrass 10% + white clover 10%, D; orchardgrass 30% + Festulolium braunii 30% + red clover 40% 등의 4개 혼파조합을 두어 난괴법 4반복으로 건물수량과 품질을 비교하였으며, 얻어진 결과는 다음과 같다. 건물수량은 상번초 위주의 D 혼파조합이 가장 놓았다(P<0.05). Kentucky bluegrass를 Festulolium braunii로 대체한 B 혼파조합이 A 혼파조합에 비하여 건물수량이 높은 결과를 보였으나, tall fescue를 Festulolium braunii로 대체한 C 혼파조합의 건물수량은 A(control) 혼파조합에 비하여 오히려 낮게 나타났다. CP, NDF, ADF, hemi-cellulose 및 cellulose 함량은 혼파조합간에 차이가 없었다. 그러나 건물소화율(DMD)은 97년에는 혼파조합간에 차이가 없었으나, 98년도에는 Festulolium braunii와 두 과목초의 식생비율이 상대적으로 높았던 C와 D의 혼파조합이 A나 B 혼파조합에 비하여 높은 결과를 보였다(P<0.05). CP와 DDM수량은 D 혼파조합이 다른 혼파조합에 비하여 가장 놓았다(P<0.05). 식생비율은 Festulolium braunii를 혼파한 B, C, D 혼파조합에서 Festulolium branunii의 식생비율이 높게 유지되었는데, D 혼파조합은 Festulolium braunii의 식생비율이 40~60%로 가장 높았다. 이상의 결과를 종합해 볼 때 Festulolium braunii는 orchardgrass + red clover와 같은 상번초위주로 혼파하는 것이 가장 좋다고 하겠으며, Festulolium braunii는 상번초의 tall fescue보다는 하번초인 Kentucky bluegrass를 대체하여 혼파하는 것이 바람직하다고 하겠다.

This study was conducted to evaluate the dry matter yield and quality of mixture swards associated with Festulolium braunii(Festuca pratensis Huds. ${\times}$ Lolium multiflorum Lam.). The experiment was arranged in a randomized block design with four mixture types: A(control); orchardgrass(seeding rate 60%) + tall fescue 20% + Kentucky bluegrass 10% + white clover 10%, B; orchardgrass 60% + tall fescue 20% + Festulolium braunii 10% + white clover 10%, C; orchardgrass 60% + Festulolium braunii 20% + Kentucky bluegrass 10% + white clover 10%, and D; orchardgrass 30% + Festulolium braunii 30% + red clover 40%. This study was carried out from Sept. 1996 to Dec. 1998 at Chungnam National University. The DM yield of D mixture type was higher than that of other mixture types(P<0.05). Compared with A(control) mixture type, the DM yield of the B mixture type which substitutes Kentucky bluegrass with Festulolium braunii was higher, but the C mixture type which substitutes tall fescue with Festulolium braunii was lower than that of A(control) mixture type. The content of CP, NDF, ADF, hemi-cellulose and cellulose among mixture types shows no significant differdence. Howerever, the DMD was not significantly different among mixture types in 1997, but the DMD of C and D mixture type were significantly higher than those of other mixture types in 1998(P<0.05). On the otherhand, the yield of CP and DDM in D mixture types was higher than those of the other mixture types(P<0.05). In botanical composition, the Festulolium braunii percentage of B, C and D mixture type with mixed Festulolium braunii wasd highly maintained, especially D mixture type was ranging from 40% to 60% in experimental periods. Following the above result, It is the most favorable mixture method for Festulolium braunii to make use of top grass like orchardgrass + red clover. It is also recommened to substitute bottom grass like Kentucky bluegrass with Festulolium braunii rather than with tall fescue in A(control) mixture type.