【摘要】 调查结果表明,嘉定地区林业苗圃常见杂草有27科65种,以禾本科杂草和菊科杂草种类最多。杨树苗圃化除试验表明,43%乙果EC100mL/666.7m2土壤封闭处理对主要杂草的防效达90%以上,对杨树生长无不良影响;灭生性除草剂20%百草枯AS、41%春多多(草甘膦)AS在严格控制条件下,采用杨树间低位定向喷雾处理,对大多数杂草的防效在90%以上,对苗木也比较安全。更多还原

【Abstract】 The investigation showed that the common weeds in forest nurseries of Jiading District had 65 species under 17 families,and most of them were under gramineal and composite families.The chemical control of weeds in a nursery of poplar indicated that the control efficiency on main weeds was above 90% through the closed soil treatment with 43%(acetochlor+oxyfluorfen) EC at a dose of 100 mL/666.7 m2,and the soil treatment had no bad effect on the growth of poplar.Also the low position and directional mist spray of 20% paraquat AS or 41% glyphosate AS had nearly the same effect.更多还原