高寒地区高速公路边坡生态防护工程试验研究

根据青藏高原三江源地区高速公路生态防护工程施工的需要，以室内人工气候箱培养为手段，就草皮移植所涉及的草皮生长特性、移植厚度、是否需要施肥以及施肥种类和数量等关键参数开展了研究。结果表明:①施工区域土壤呈微碱性或弱碱性，有机质含量低，土壤贫瘠，P和N较为缺乏；②草皮移植施工中应采取施肥处理，肥料宜采用磷酸二铵，施肥量不宜小于250 kg/hm2；③草皮移植宜在冬季结束气温回升至15℃左右再进行，草皮成长过程中，应注意保温、保湿；④草皮厚度以不低于15 cm为宜。

Experimental Research on Bioengineering Protection for Highway Slope in Alpine Regions

As required by construction of bioengineering protection for highways in Sanjiangyuan Region in Qinghai-Tibet Plateau, the key parameters in relation to grass sod transplant, such as sod growth features, transplant thickness, whether to need fertilization and the type and amount of fertilizer, were studied by means of indoor artificial climate box. The result shows that, ① the soil in Sanjiangyuan region is slightly or weakly alkaline, with low content of organic matters, hence the poor soil is lack of P and N; ② the grass sod transplant should be applied with fertilization which should adopt diammonium phosphate and be amounted not less than 250 kg/hm2; ③ the grass sod transplant should be carried out by the end of winter and at the time when the temperature goes up to about 15℃, furthermore, thermal insulation and moisture retention shall be paid attention to in the growth period; ④ the sod thickness should not be less than 15 cm.