春播高丹草在河北低平原区的播期效应研究

Study on the seeding date of spring sowing period of Sorghum sudanense in Hebei Lowland Plain

在河北低平原区,对高丹草Sorghum vulgare品种晋草1号进行了春播播期试验研究。结果表明,晋草1号具有明显播期效应。播期能对高丹草产草量和粗蛋白产量产生明显影响。4月15日播种鲜、干草产量和粗蛋白产量最高,4月22日播种鲜、干草产量较高;4月15日和4月22日播种出苗时间较短;株高、小区茎数、鲜干比不同播期情况下差异不显著。综合分析,以4月15-22日为春播的最佳播期。适期播种情况下,如果加强生长期间的田间管理并且及时刈割,最后1次刈割时期适当后延至10月10日,晋草1号高丹草在河北低平原区能完成3茬草的收获。

In the low plain region of Hebei, the sowing period test of Sorghum sudanense ＂Jincao 1＂ was hold in spring. The results indicated that, ＂Jincao 1＂ had evident sowing effect. Sowing period distinctly affected the grass yield and gross protein yield. The fresh grass yield and the hay grass yield and the gross protein yield was the highest on the April 15, the fresh grass yield and the hay grass yield was the second, on April 22. The period of seedling emergence was shorter than others on April 15 and April 22; The difference of the plant height and stem number of a plot and the dry-fresh weight ratio were not obvious on different sowing periods. Therefore, the best sowing period was between April 15 and 22. Sowed in right time, being strong, with proper field management among growing periods and cut timely, the last cut time would be delayed to October 10th, and ＂Jincao 1＂ would reap three times in the low plain region.