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Comparison of efficiencies and costs of different weed control methods in paddy production in Iran

International Journal of Agricultural and Biological Engineering 2012年第2期5卷 28-33页

作者： reza tabatabaekoloor Hasan Yousefnia pasha Jafar Hashemi Department of Farm Machinery Sari Agricultural Scieneces and Natural Resources UniversitySariIran

Using of efficient and inexpensive method for weed control has an important role in increasing efficiency and reducing costs of *** this study,field experiments were carried out to evaluate the efficiency and costs of several weed control methods in paddy production during summer in Mazandaran,the north province of Iran in *** weed control treatments(T1 to T7)were applied at three stages of rice growth(20 and 35 days after transplanting and grain harvesting time).Weed density,weed dry weight,labor used and economical comparison were determined in the basis of a complete randomized block design with three *** showed that there were no significant differences among efficiencies of six treatments(except for weedy check method(T6)treatment).The minimum weed density and dry weight were obtained at herbicide+hand weeding once(T5)and herbicide application once(T7)treatments during all three *** costs of weed control were different among the *** of control method has an important role in reducing *** weeding twice method(T1),because of its high weeding cost,hard work and worker restriction in the required time,is not *** weeding twice method(T2),due to its zero environment pollution,reducing costs of weed control and high benefit/cost,is the best and most appropriate *** of weed damage in weedy check method(T6)varied between 30.5%and 45.3%.

关键词： weed control paddy production economic evaluation mechanical weeding chemical weeding yield

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