留茬高度对闽牧42牧草的影响

Effects of stubble heights on regeneration and dry matter yield of forage variety-Minmu 42

设置留茬高度分别为 0、6、12cm 3个处理 ,对闽牧 4 2牧草影响的结果表明 :留茬高度为 6cm时 ,闽牧4 2牧草的平均再发植株数、干草产量分别是 12 9 1株 /m2 和 4 1 83t/hm2 ;0cm时 (与地面平割 ) ,可明显降低闽牧 4 2牧草的平均再发植株数 (P <0 0 1) ,进而显著降低牧草的产量 (P <0 0 5 ) ,与留茬高度 6cm相比 ,平均干草产量下降了 13 3% ,再发植株数降低了 13 2 %。而留茬高度为 6cm和 12cm之间的平均干草产量差异不大 (P >0 0 5 ) ;留茬高度对闽牧 4 2营养成分和生长速度的影响均不显著 (P >0 0 5 )。故收割时适宜的留茬高度为 6cm。

Three treatments of stubble heights, 0, 6 and 12 cm, were conducted to study the effects on regeneration and yield of the forage variety Minmu 42 The results showed that the average number of regenerating plants and dry matter yield of Minmu 42 at the stubble height of 0 cm were decreased significantly ( P <0 05) compared with those at the height of 6 cm However, there was no significant difference ( P >0 05) between 6 cm and 12 cm treatment Therefore, the best stubble height for Minmu 42 should be 6 cm