库布齐沙漠飞播成效的研究

Improving of aerial-seeding techniques in Kubuqi Desert

通过长期的飞播造林实践证明:1)在库布齐沙漠西段半荒漠地带高大沙丘设置间距4m平铺行列式沙障和间距6m直立行列式沙障,飞播植物成苗率分别为45.6%和46.2%,比其它类型沙障区的成苗率高出8.9%～30.2%,比未设沙障的对照(CK)区高出36.5%～37.1%。2)种子包衣丸化处理后,沙丘迎风坡等不易落种地段的落种量比对照(CK)提高了59%～86%;在成苗率方面,比裸种提高了13.02%;在生长量方面,包衣丸化种子播后15d,其平均根长、平均侧根数、地径、苗高分别比裸种提高了11.93mm、0.9条/株、0.29mm、3.24mm。3)在库布齐沙漠腹地,采取综合措施的地面破土效果最好,成苗量可达对照区的6～8倍。

As a quickly effective measure of modernization forestation,Aerial-seeding forestation in Kubuqi Desert has been an important measure of vegetation restoration and reconstruction in Ordos.Through long term practice,Aerial-seeding forestation has proved：（1） Through Aerial-seeding experimental comparison by setting different size Gordejevii Barrier at Mu Us sandy land,Aerial-seeding species of seedling rate that averagely has a more percentage of 8.9 to 30.2 than other＇s and 36.5 to 37.1 percentage than CK area has a setting size of gordejevii Barrier that is the even spread type is apart from the 4 metre row or column type checkerboard and erection type to be apart from 6 metre row or column type checkerboard,and its seedling rate is 45.6% and 46.2%.（2） The primed and pelleted seeds treatment of Aerial-seeding seeds have following benefits： increasing the amount of Aerial-seeding seeds＇ falling,totally with a more percentage of 59 to 86 per area than CK＇s on average;in the seedling rate.the primed and pelleted seeds with a additional percentage of 13.02;after 15 days of the primed and pelleted seeds＇ sowing,its root on average is longer than naked seeds by 11.93mm;side number on average is more than naked seeds by 0.9twip/plant,ground path is longer than naked seeds by 0.29mm,and young plant of high is longer than naked seeds by 3.24mm.（3） The condition of environment,preservation young plant is six to eight times than contradistinguish by different seed treat in Kubuqi Desert.