不同菌剂对边坡植物高羊茅种子萌发和土壤性质的影响

Effects of Different Fungicides on Seed Germination of Tall Fescue in Slope Plants and Soil Properties

近年来生态护坡已经成为高速公路建设中边坡防护的重要发展方向,但边坡坡度陡、坡面自然条件差和土壤肥力低对植物生长有不利影响,而微生物菌剂对植物的生长和土壤性质的改良具有良好的提高和改善效果。本文采用高羊茅为供试植物,定制坡度为15°的铁箱模拟边坡,分别用枯草芽孢杆菌、贝莱斯芽孢杆菌和速生短杆菌拌土处理,研究不同菌剂对不同位置高羊茅种子萌发以及土壤性质的影响。试验表明,枯草芽孢杆菌和贝莱斯芽孢杆菌的添加对边坡不同位置上的高羊茅种子萌发和土壤性质的改良具有促进作用,但后者的促进作用略低于前者。速生短杆菌处理下的高羊茅发芽率低于对照组,土壤有机质、水解氮、速效磷含量与对照组相比无显著性差异。在同一处理下,边坡不同位置对种子发芽率和土壤性质有不同程度的影响,但其无显著差异(P>0.05)。综合来看,当高速公路边坡绿化选用高羊茅时,可施加枯草芽孢杆菌促进其的生长和改善土壤养分。

Ecological slope protection has become an important development direction of slope protection in highway construction recently,but the steep slope slope,poor natural conditions of the slope and low soil fertility have adverse effects on plant growth,while microbial agents have a good effect on the growth of plants and the improvement of soil properties.In this paper,tall fescue was used as the test plant,and the simulated slope of the iron box with a slope of 15°was customized,and the soil was mixed with Bacillus subtilis,Bacillus velezus and Bacillus fast-growing B.brevis,respectively,to study the effects of different fungal agents on seed germination of tall fescue and soil properties at different locations.The results showed that the addition of Bacillus subtilis and Bacillus velez could promote the seed germination of tall fescue and soil properties improvement at different locations on the slope,but the latter had a slightly lower promoting effect than the former.The germination rate of tall fescue under the treatment of B.fastifloris was lower than that of the control group,and there was no significant difference in soil organic matter,hydrolyzable nitrogen and available phosphorus content compared with the control group.Under the same treatment,different locations of slope had different effects on seed germination rate and soil properties,but there was no significant difference(P>0.05).In general,when tall fescue is selected for highway slope greening,Bacillus subtilis can be applied to promote its growth and improve soil nutrients.