芽前除草剂和地膜对杂草防除和牛至生长的影响

牛至Orianum vulgare是唇形科多年生草本植物,牛至精油具有抗菌消炎功效,是重要的中兽药和饲料添加剂.牛至在苗期生长缓慢,杂草防除是牛至田建植的基础.本研究分析了芽前除草剂和地膜对牛至田杂草防控和牛至生长的影响.结果 表明,除草剂和地膜覆盖对杂草防除和牛至生长的交互效应显著.其中,覆盖黑色地膜并喷施960 g...

Effects of pre emergent herbicides and mulch film on weed control and oregano growth

Origanum vulgare is a perennial grass in the family of Labiatae. Its essential oil has antisepsis and anti inflammation effects and is used in herbal veterinary drug and feed additives. Due to the slow growth of oregano seedlings, it is fundamentally important to control weeds in the oregano field. In this study, effects of mulch film and pre emergent herbicides on weed control and oregano growth were analyzed. The results showed that there was a significant cross effect of mulch film and herbicide on weed control and oregano growth. Among all treatments, the treatment of black mulch film coverage together with S-metolachlor 960 g/L EC sprays showed the best effect on weed control, with the efficacies of 100% and 97.6% in winter and spring, respectively, and the fresh weight control efficacy was 99.7%. Beside, this treatment had no significant inhibition on tillering per oregano plant and leaf fresh weight per plant. Yet, spraying 50% acetochlor EC inhibited the tillering of oregano, and 330 g/L pendimethalin EC inhibited the leaf growth of oregano. In addition, in the pot experiment, all the pre emergent herbicides had inhibitory effects on plant height and tiller. To sum up, we recommend S-metolachlor 960 g/L EC at the spray dose of 1 200 mL/hm2 before oregano seedling transplantation and black mulch film coverage. Besides, it is also important to remove timely the black mulch film in hot and humid summer season to promote tillering and vegetative growth of oregano.