不同刈割高度对“蜀草1号”高丹草产量和饲用价值的影响  

Effect of different cutting height on yield and feeding value of sorghum hybrid Sudan grass cv. Shucao No.1

作　　者：周丽 付薇 覃涛英 孟军江 桂永清 韩永芬 ZHOU Li;FU Wei;QIN Tao-ying;MENG Jun-jiang;GUI Yong-qing;HAN Yong-fen

机构地区：[1]贵州省草业研究所,贵州贵阳550006 [2]贵州金农富平生态农牧科技有限公司,贵州铜仁554100 [3]贵州松桃苗族自治县山地生态畜牧业发展中心,贵州铜仁554100

出　　处：《饲料研究》2022年第21期104-107,共4页Feed Research

基　　金：贵州省科技计划项目“国审高丹草新品种规范化种植及肉牛生态养殖技术集成应用(项目编号:黔科合成果[2021]一般041)”。

摘　　要：试验旨在探讨刈割高度对“蜀草1号”高丹草产量和相对饲用价值的影响。选取4个不同刈割高度蜀草1号,分别为H1 (150~160 cm)、H2 (190~200 cm)、H3 (230~240 cm)和H4 (270~280 cm),测定不同处理蜀草1号的产量和营养价值。结果显示:刈割高度为H1时,一年可刈割4茬,蜀草1号的鲜草产量最高,为133.44 t/hm^(2),干草产量为22.33 t/hm^(2);蜀草1号的粗蛋白、粗脂肪含量最高,分别为11.59%,5.01%;相对饲用价值最高,为107.93。刈割高度为H4时,蜀草1号的干草产量最高,为33.63 t/hm^(2),鲜草产量为118.89 t/hm^(2),但相对饲用价值最低。研究表明,综合各项指标,“蜀草1号”高丹草在150~160 cm刈割时可以兼顾饲草产量和营养品质。The study was to explore the effect of cutting height on yield and relative feeding value of sorghum hybrid Sudan grass cv. Shucao No.1. Four different cutting heights of sorghum hybrid Sudan grass cv. Shucao No.1, H1(150~160 cm), H2(190~200 cm), H3(230~240 cm) and H4(270~280 cm) were selected, respectively, to determine the yield and nutritional value. The results showed that when the cutting height was H1, Shucao No.1 could be cut four stubbles per year and the fresh grass yield was the highest, was 133.44 t/hm^(2), the hay yield was 22.33 t/hm^(2). The crude protein and crude fat content of H1 were the highest among four treatments, which were 11.59% and 5.01%, respectively, and the relative feed value was the highest, was 107.93. When cutting height was H4, the hay yield was the highest, which was 33.63 t/hm^(2), and the fresh grass yield was 118.89 t/hm^(2), but the relative feed value was lowest. The study indicates that based on various indicators, Shucao No. 1 can take into account both the yield and quality of forage when it is cut at 150~160 cm.

关 键 词：“蜀草1号”高丹草 刈割高度 相对饲用价值 

分 类 号：S816.5[农业科学—饲料科学]