不同刈割周期、留茬高度对4种柱花草属牧草产量的影响

Effect of Cutting Cycle and Stubble Height on Forage Yield of Four Varieties of Stylosanthes guianensis

利用正交试验研究了不同刈割周期、留茬高度对4种柱花草属牧草产草量的影响。试验表明,草种和刈割周期对草产量的影响显著,留茬高度对草产量影响不大,各因素对草产量的影响为:RA>RC>RB,即品系>刈割周期>留茬高度。极差分析得出各因素的最优水平为:A2品系,GC1581柱花草;B4留茬高度,40cm;C2刈割周期,60d。

An orthogonal experiment was arranged with 4 varieties of Stylo （Stylosanthes guianensis） which were cut at various stages and stubble heights and compared in forage yield. The results showed that varieties and cutting cycle but not stubble height gave evident influence to forage yield, which was in the order of varieties 〉 cutting cycle 〉 stubble height. Range analysis revealed that the best variety was S. guianensis cv. GC1581 with the optimum cutting cycle and stubble height being 60 days and 40 cm, respectively.