In this thesis, Based on the comparison of different sowing date of parents in Pennisetum americanum x P. purpureu, to present the best sowing time for parents in Pennisetum americanum x P. purpureu.
本文通过对杂交狼尾草亲本的不同播种期试验对比，提出了杂交狼尾草亲本的最佳播种时间；
The best sowing time of Haloxylon ammodendron in the east of Helan Mountain in Ningxia autonomy is studied.
目的：研究确定宁夏贺兰山东麓梭梭育苗的适宜播种期。
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