嘧磺隆的淋溶特性及其对果树幼苗安全性测定

Leaching of Sulfometuron and Effect on Fruit Seedlings

在室内用上柱法研究了嘧磺隆(森草净)在沙壤土和粘壤土中的淋溶特性及其对盆栽果树幼苗的安全性.结果表明,嘧磺隆在沙壤土中的移动性明显高于粘壤土,淋溶距离分别是8～9cm和13～14cm;上壤性质是导致淋溶距离不同的主要原因.不同种类的果树对嘧磺隆的敏感性不同,其顺序是苹果>梨>山桃.从盆栽果树安全性测定中可以看出,嘧磺隆对三种果树在沙壤土和粘壤土中的安全用量分别是山桃22.5和90.0g(有效成分,下同)/ha,苹果11.3和45.0g/ha,梨22.5和45.0g/ha.

Greenhouse experiments were conducted to study the leaching of sulfometuron and it's effect on fruit seedlings, including apple, pear and wild peach. Results indicated that the leaching distance varied with soil type, it was 8-9cm in clay loam soil and 13-14cm in sand loam soil. Phytotoxity of sulfometuron on fruit seedlings depend on fruit type, the sequence was apple > pear > wild peach, and the safety doses were 11.3, 22. 6 and 22.6g/ha respectively in sandy loam soil, 45,45 and 90g/ha respectively in clay loam soil.