تاثیر بقایای خرد شده برگ خرما بر ممانعت از رشد علف هرز پنجه مرغی (Cynodon dactylon) در نخلستان خرماPhoinex dactylifera)) جنوب کرمان

Date palm one of the economic and very important products in the tropical and subtropical regions of the world. Every year, farmers residues of dates tons several of dried leaf of dates leaves or store them and set them on fire. The perennial weed, bermuda grass, causes severe damage to date orchards in the south of Kerman every year. This plant has been introduced in 57 countries of the world as a serious, problematic and difficult to control weed.So that some weed control methods, including mechanical control and chemical control, do not have an effective effect on the control of this noxius plant due to the structure and depth of the rhizomes. In the conducted research, no research has been conducted on the allelopathic effects of date leaves on preventing the growth of weeds in date orchards. For this purpose, an experimental in the 2022-2023 crop year in date palm orchards assosiated to Astan Quds Razavi in the south of Kerman in the form of a randomized complete block design with 5 treatments and 4 replications was conducted. The tested treatments included residues leafs of palm dates at the rate of 1500 kg.ha, 2500 kg.ha, 3500 kg.ha, 4500 kg.ha and control treatment infested with weeds (without residues). At the end of the experiment, quadrarts measuring 1*1 m2 was conducted, The traits tested including density, freh and dry weight of above and below ground organs (rhizome) and weed height were counted and weighed. The results of showed that residues palm date have a very strong effect on suppressing and prevention the growth of the weed. Application date palm residues at the rate of 4500 kg.ha reduced the density and dry weight of the above and below ground parts of the weed by 100%. Whereas the highest density and dry weight of above and below ground organs were observed in weed-infested control treatment. Aplication leaf date palm residues at date orchards while maintaining soil moisture and reducing the consumption of herbicides, it is a natural and very compatible method to preserve the environment. Undoubtedly, palm growers can use the allelopathic properties of date leaf in their palm gardens with the aim of achieving non-chemical control of bermuda grass weed.