播种造林种基盘基质的改良研究

Study on improving Seed-base materials for afforestation by direct seeding

为提高干旱半干旱地区植被恢复中的种子发芽率、成活率和初期生长量,提出了局部改善植物生长环境的技术,即播种造林的种基盘绿化技术。实验研究了添加物对种基盘基质水分特性的影响和使用种基盘绿化技术对植物生长的影响。结果表明:通过添加土壤活性改良剂,可以提高种基盘基质的透水性和吸水速率,降低其表面蒸发量,并能促进植物的地上部生长;添加土壤侵蚀防止剂,对种基盘基质的透水性及植物的生长没有显著的影响,但对于维持种基盘形状、提高施工效果很有帮助;通过种基盘进行播种造林,可以增加根的生长粗度,并能促进植物根系向土壤深处发展,从而有利于提高苗木的抗旱能力。

The effects of addition on hydrologic characteristics of Seed-base materials and the effects of afforestation technique of Seed-base on growth of plant are studied. The results showed that with the active conditioner dosage of soil increasing, the water permeability and hygroscopicity rate of Seed-base are increased, the surface evaporation of which is reduced, and the growth of ground upside of plant is accelerated. The addition of dosage of preventing soil from erosion has no apparent effects on water permeability of Seed-base materials and the growth of plant, however, it is helpful to maintain the form of Seed-base, and improve the effect of construction. With direct seeding by Seed-base, the thick of roots can be increased, the root of plant can be accelerated growing down into deeper soil, and the ability of resisting drought of seedling can be enhanced.