农牧老芒麦良繁播种期试验研究

Effect of Sowing Dates on Seed Production of Elymus Sibiricus L. cv. Nongmu.

2001～2004年在内蒙古正蓝旗育草站进行了4年良繁播种期试验。从2001年7月至2002年8月每隔半月播种一次,观测不同时期播种对农牧老芒麦当年种子萌发出苗、幼苗生长及对每年种子产量和品质的影响,以期探索最佳播种期。一个完整年度播种期的试验结果表明,3月底至10月底为可播种期;农牧老芒麦的3个适播期为早春(土壤解冻至4月中)、夏秋(6月底至8月底)和冬初(10月底至土壤冻结)。在灌溉条件下,早春4月中旬前播种,当年可以正常结实;夏秋雨季播种,易于抓苗保苗,翌年返青生长良好,种子产量高;冬初为最佳播种期,既有利于翌年早春种子萌发和幼苗生长、正常结实,又可合理调配播种机具和人力,特别是可以避开当地春季风沙,保证播种安全。

The field experiments were carried out during 2001～2004 at Zhenglanqi of Xilinguole ,Inner Mongolia, to determine the best sowing date of Elymus sibiricus L. cv. Nongmu. Seeds were sown fifteen times in a whole years cycle, from July 27 to October 25 of 2001 in every half months, and went on from April 1 to August 26 of 2002. Sowing dates in this range result in different growing temperatures and photoperiods that affect the seed germination, seedling growth, ear development and seed yield. The normal seed yield can be made by early spring sowing before April 15. The plants grow well, but no seed production by late summer sowing. The most suitable sowing time is early winter. Sowing before soil frozen the seeds can’t germinate in the right year but in the next early spring, and the seedlings grow well in the suitable condition, and new seeds mature well in the late summer. Meanwhile it’s also benefit to avoid strong wind when sowing in the spring.