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飞播治沙造林作为一项快速有效的现代化造林措施,已经成为鄂尔多斯毛乌素沙区腹地植被恢复与建设的重要手段。长期的飞播造林实践表明:①在飞播区,设置沙障是提高飞播成效的重要途径。设置平铺式间距4 m行列式沙障和直立式间距6 m行列式沙障,飞播物种成苗率较高,比对照(CK)区的成苗率高出36.5%~37.1%。②飞播种子包衣、丸化处理,均能促进成苗,包衣处理更有利于飞播植物生长。飞播种子包衣、丸化处理与裸种相比,成苗率分别提高了10.6%和13.72%。而且包衣种子播后15 d,其根长、根条数、地径和高生长比对照分别高出11.93 mm、0.9条、0.29 mm和3.24 mm。③不论是在何种立地条件下,经过地面处理的样方内的飞播种子成苗量明显高于对照区样方内的成苗量,其中,采取综合措施的破土处理效果最好,成苗量是对照区的6~8倍。
As a fast and effective modern afforestation measures, aerial seeding and sandification afforestation has become an important means of vegetation restoration and construction in the hinterland of the Mu Us Sandy Area in Erdos. The long-term practice of aerial seeding afforestation shows that: ① In sandcastle areas, setting up sand barriers is an important way to improve the effectiveness of aerial seeding. Set the sand barrier of 4 m tiled spacing and determinant of sand barrier of 6 m upright spacing, the seedling rate of airborne species is higher, which is 36.5% -37.1% higher than the control (CK). ② airborne seed coating, pelleting treatment, can promote seedling, coating treatment is more conducive to the growth of aerial seeding. Compared with the naked species, the seedling rate increased by 10.6% and 13.72% respectively after the seed coating and the pelleting treatment were carried out. The root length, root number, root diameter and height growth of the coated seeds were 11.93 mm, 0.9 mm, 0.29 mm and 3.24 mm higher than that of the control respectively 15 d after sowing. ③ Regardless of the site conditions, the seedling volume of aerial seeding seeds in the quadrats after ground treatment was significantly higher than that in the sample plots of the control plots. Among them, the soil treatment with comprehensive measures was the best, The amount of control area 6 to 8 times.