白羊草与胡枝子混播对牧草生产性能和品质的影响
Effects of Mixed Sowing Ratio of Bothrichloa ischaemum and Lespedeza davurica on Forage Production Performance and Quality
为探究乡土草种最佳混播比例对牧草生产性能和品质的影响,选取乡土草太行白羊草(Bothrichloa ischaemum cv.Taihang)和晋农1号达乌里胡枝子(Lespedeza davurica cv.Jinnong 1)为试验材料,按照白羊草∶胡枝子1∶1、1∶2、1∶3、1∶4、2∶1、3∶1、4∶1设置7个处理,同时以2个单播为对照(Tck、Jck),随机区组设计,测定株高、产量、叶茎比、粗蛋白含量等生产性能和品质指标。结果表明,5月至6月初,白羊草的生长速度为0.14~0.48 cm/d,以白羊草与胡枝子的比例1∶1最高,Tck最低;至7月初,白羊草的生长速度显著增加,以白羊草与胡枝子的比例1∶4混播生长最快,白羊草与胡枝子的比例2∶1混播生长速度最慢,整体生长速度为0.31~1.88 cm/d;胡枝子生长速度为0.58~1.55 cm/d。干草产量以白羊草与胡枝子的比例1∶4(15.21 t/hm2)和1:3(15.77 t/hm2)混播组合较高,显著高于对照;混播增加了牧草粗蛋白质含量。以白羊草与胡枝子的比例1∶3和1∶4混播组合的株高、干草总产量、粗蛋白质含量最高,2种草混播种间相容性好,并提高了牧草的生产性能和品质。
To explore the effects of the optimal mixed sowing ratio of native grass species on the production performance and quality of forage, in this study, Bothrichloa ischaemum cv.Taihang and Lespedeza davurica cv. Jinnong 1 were selected as test materials. 7 treatments according to the 1∶1, 1∶2, 1∶3, 1∶4, 2∶1, 3∶1, and 4∶1 ratio of B. ischaemum to L. davurica were set. Two unicast treatment(Tck, Jck) were set as the control, a randomized block design was used, and the production performance and quality indexes including plant height, yield, leaf-stem ratio, and crude protein content were determined.The results showed that the growth rate of B. ischaemum ranged from 0.14-0.48 cm/d from May to early June, with the highest ratio of 1∶1 and the lowest Tck. By early July, the growth rate of B. Ischaemum increased significantly, with the fastest growth rate of 1∶4 and the slowest growth rate of 2∶1, and the overall growth rate ranged from 0.31 to 1.88 cm/d. The growth rate of L. davurica ranged from 0.58 cm/d to 1.55 cm/d. The hay yield of mixed sowing was the highest at 1∶4(15.21 t/ha) and 1∶3(15.77 t/ha), which was significantly higher than that of the control. Mixed sowing increased the content of crude protein. In the mixed sowing combination, the combinations of 1∶3 and 1∶4 had the highest plant height, hay yield, and crude protein content, mixed sowing of the two kinds of grass had good compatibility and improved the production performance and quality of forage.
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山西林业职业技术学院自然科学类科研基金(20220109)
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