北京永丰地区绿化带草坪土壤线虫群落特征分析

对北京永丰地区绿化带草坪中枯黄与健康草坪土壤线虫营养类群及其数量进行了比较,以找出线虫与草坪枯黄的关系。结果表明,该地区无论枯黄还是健康草坪表土下0~20 cm土壤中的线虫都涉及5目9 科12 属,其中植物寄生线虫涉及2目4科5属,非植物线虫共涉及3目5科7属;枯黄草坪中植物线虫占绝对优势,为总数的87.89%,是其他营养类群总和(12.05％)的7倍,其中螺旋属、短体属和毛刺属线虫数量近于健康草坪的2倍;WI值显示北京海淀永丰地区绿化带草坪的土壤健康存在潜在危机,枯黄草坪的土壤健康程度很差。

Analysis of community characteristics of nematodes in turf soil of Yongfeng virescence region in Beijing

A comparison of trophic groups and quantity of nematodes in wilted and healthy turf soil in Yongfeng virescence region of Beijing was done to study the relationship between nematodes and turf wilt.Nematodes in the 0-20 cm depth of soil,whether in wilted or in healthy turf,belonged to 12 genera in 9 families of 5 orders.Harmful nematodes(phytophage nematodes,PPNs) were classified into 5 genera in 4 families of 2 orders and beneficial nematodes(non PPNs) were classified into 7 genera in 5 families of 3 orders...