盐城地区绿化带金森女贞枯死原因分析及治理对策

近几年来,江苏省盐城市亭湖区西环路及省道331两侧的金森女贞出现大面积枯死,重害地块植株枯死率超过80%,为了寻找诱发植株枯死的原因,系统地对重害地块及正常地块的土壤养分、土壤理化性质、浇灌用水化学性质与地下水化学性质等环境因素进行了取样分析。结果表明,诱发植株枯死的主要原因为移栽施工时浇灌用水的含盐量过高。通过单因子试验发现,去除钵壳、搭防晒网遮阳、适当浅植、下雨后及时除草松土能显著提高成活率,移植时用100～500 mg/L的Fe-SO4溶液浇灌1～2次,能进一步提高成活率。

Analysis of Death of Ligustrum japonicum in Greenbelt in Yancheng District and Its Management Countermeasures

In recent years,a large-area of Ligustrum japonicum Howardii in both sides of Xihuan road and provincial road No.331 of Yancheng city in Jiangsu province withered,and the dead rate of plants in the heavy damage land exceeded 80%.In order to find out the reasons of inducing the death of plants,this paper systematically compared and analyzed some environmental factors in heavy damage land and normal land,such as soil nutrition,soil physicochemical property,chemical property of irrigation water and ground water.The results showed that the main reason of inducing the death was too high salinity of irrigation water when the plants were transplanted.Through single factor test,it was found that the survival rate of plants could be significantly increased by the following measures: removing mortar shell,building the sun net for shade,appropriately shallow planting,and timely weeding and loosing the soil after rainfall.The survival rate of plants could be further increased by irrigating 100~500 mg/L FeSO4 solution when they were transplanted.