بررسی بررسی استفاده از ‭Sheet mulches (‬نایلون و گونی) در کنترل علفهای هرز در خزانه تولید نهال افرا در نهالستان درزیکلاه

Many Sapling annually plant at the forest nurseries in Mazandaran province. Control of weeds is the most important problems in these nurseries. The most popular methods for control of weeds in these nurseries is using proletarian. But it is much expensive to control of weeds. Therefore using sheet mulch is attended to manage of weed control as a safe method. This project carried out in the nursery of wood industrials company of farim (Sangedeh) in 2007-2008. Treatments were white and black nylon, gunny and control (with and without weeding). This project carried out in the completely randomized block plan with three replication and five treatments. Results on the base of composite analysis and comparison of data biennial average of height and cordial diameter of maple saplings using Duncan test (P 5) showed that there is not any significant difference between treatments except control without weeding. But there is significant difference between years 2007 and 2008 separately. Also there are not significant difference between weight and number of weeds in annual and biennial years (except control without weeding). Nevertheless, the least number and weight of weeds were belonging to black nylon. Some weeds grew in white nylon and gunny. In this investigation did not show any pest and diseases in treatments. In aspect of economy black nylon was cheaper than the others and was fifth of proletarian cost. Key words: Nursery, Maple, weed, Sheet mulch