Soil Quality Investigation and Improvement Measures in Cerasus Plantations in Beijing Yuyuantan Park

In order to find out the soil quality of cherry blossoms in Beijing Yuyuantan Park, we investigated 8 cherry blossom planting areas (Wan Cherry Garden, Zaishuifang, Yingtang Chunxiao, Li Yingyuan, Friendship Cherry Forest, Da Lawn, Changdi, and Demonstration Area)9 The basic physical and chemical properties of soil and the accumulation of soil-borne pathogenic fungi (Fusarium spp., Phytophthora spp.) and Meloidogyne spp. , and three kinds of nematicides, including danaram, abamectin, thiazophosphine, oligosaccharide and thiazophosphine, were used in layered application technology to treat the soil of Liyingyuan in order to improve the soil quality. The results showed that the comprehensive soil quality evaluation level ( Z) of the five scenic spots in Wanyingyuan, Shuifang, Yingtangchunxiao, Changdi and the demonstration area was medium (5≤Z<8), while Li Yingyuan, Friendship Yinglin and The comprehensive soil quality evaluation grade of the three scenic spots in Dacaoyuan was poor (1≤Z＜5), and the soil-borne pathogens accumulated a lot in the soil. Among them, Fusarium, Phytophthora, and root-knot nematodes were carried in the soil of Liying Garden. The numbers were as high as 3125 cfu·g-1, 3990 cfu·g-1, and 233·100 g-1, respectively, indicating serious soil health problems. The combination of Dazomet and three nematicides can effectively control soil-borne pathogens and root-knot nematodes. The treatment effect was the most ideal, and the control effects on Fusarium, Phytophthora and root-knot nematode were 99.13% ~ 99.79%, 77.5% ~ 92.45%, 74.07%~ 98.57%, respectively. The test results provide data reference for improving the soil quality of cherry blossoms in Beijing Yuyuantan Park.