两种覆盖对公路路肩土壤含盐量的影响

滨海盐地区公路绿化中,表层覆盖是降低路肩土壤含盐量的重要途径。该试验历时2年,在2004年3月末,分别在国道庄林线大水塘~二道沟段选取35个点。5个点为无覆盖的CK,15个点用10 cm厚的稻草覆盖,另15个点覆盖10 cm厚的秸秆。利用电导法,测定在树木生长季节内(春、夏和秋),路肩表层0~20 cm和覆盖下0~20 cm土壤的含盐量,并监测了秸秆覆盖和稻草覆盖对营口国道庄林线路肩土壤含盐量变化。结果表明:两种覆盖对降低土壤盐分是有效的;稻草和秸秆的物质成分不同,导致两种覆盖的有效期不同。

Effect of Two Kinds of Covers on Salt Content in Highway Shoulder Soil

To reduce the salt content in highway shoulder soil is an important topic in planting along high way in seashore areas.The first step was to cover the surface layer of it.It took two years to conduct the test from late March,2004.Thirty-five sample spots were selected separately from Zhuanglin Road Big Pond to Two-channel sections.From these 35 sample spots,5 were non-covered as CK, 15 spots were covered with 10 cm straws,and other 15 spots were covered with 10 cm straw stalks.The salt content in 10～20 cm surface layer of highway shoulder soil in tree-planting season was determined by the Electricity conductivity law and the change of salt content in the soil covered with straw stalk and straws on both sides of Zhuanglin Road was monitored.The result indicated that: two kinds of covers had different effects on the reduction of salt content.The difference between straw stalks and straw materials caused the different terms of validity.