高等级公路边坡牧草绿化混播试验的研究

Study on Herbage Afforestation along High way

测定１３种引种牧草及６种混播组合的密度、高度、产量、盖度、颜色、青绿期、地下生物量等不同生物性状指标，用模糊数学综合评判法对其进行的综合评判，对６种混播组种方案的各项指标进行综合评价后得出，混播组合方案１的综合性状表现最好，综合评价值为０．７４；其次是混播组合方案４，综合评价值为０．６０；再次是混播组合方案５，综合评价值为０．５３；而以混播组合方案３的综合性状表现最差，综合评价值仅为０．５８；混播组合方案２的次差，综合评价值为０．５９。同时还得出，在春旱比较严重，夏季干热风危害比较厉害的西安地区，水热条件是影响高等级公路边坡牧草绿化成败与否的关键。结合这一气候特点以及陕西省高等级公路边坡的特殊性，提出了一套适合陕西省高等级公路边坡绿化的技术措施。

The biological characteristics of thirteen introduced herbages and six mixed compositions were measured, and the synthetic judgment of fuzzy mathematics was used to assess their quality. The results showed that Trifolium repens L., Zoysiajaponia Steud. and Elymus dahuricus Turcz. could not grow and develop which were proved unsuitable to afforest along High way. The other introduced herbages were all suggested to afforest along High way, especially Bromus inermis Leyss., Tall Festuca, Lolium perenne L., Onobrychis Viciaefolia Scop. and Coronilla Varia L. Moreover, the orders of following optimum mixed compositions were arranged as one ( Onobrychis Viciaefolia Scop.60 % + Bromus inermis Leyss. 20 % + Lolium Prenne L. 20 %) > four ( LoliumPerenne L. 40 % + Poa Pratensis L. 20 % + Agrostis Stolonifera L. 20 % + Festucarubra L. 20 %) >five (Elymus dahuricus Turcz. 30 % + Lolium Prenne L. 40 % + Bromus inermis Leyss 30 %) >two ( Coronilla Varia L. 60 % + Bromus inermis Leyss 20 % + Lolium Prenne L. 20 %) >three (Coronilla Varia L. 70 % + Lolium Prenne L. 30 %). The results showed that moisture and temperature was the key limiting factors for the success of herbage afforestation along High way in Xian region.