عنوان مقاله [English]
In order to study the effects of conventional and conservation tillage with management residue on wheat physiological properties, a field experiment was conducted in 2013-2014 at Mashhad Agricultural and Natural Resources Research Center of Razavi Khorasan province. This experiment was carried out as split plot design based on a randomized complete block design with three replications. Main plots included tillage systems: 1) conventional tillage, 2) reduced tillage and 3) no tillage; subplots were management residue: 1) 0%, 2) 30% and 3) 60% residue. The results showed that tillage systems had significant effect on relative water content (RWC), the difference between canopy temperature and air temperature (∆t), SPAD reading, Flag leaf area (FLA), Leaf water potential (ΨW) and Radiation interception (RI). The highest RWC (83%), ∆t (-7.36 cº), SPAD (47.35), FLA (26.3 cm2), ΨW (-11.19 bar) and RI (90.22%) were detected in no-tillage method. Residue management had significantly different on RWC, ∆t and RI traits, but no significant effect on SPAD reading, Flag leaf area (FLA), leaf water potential (ΨW) was detected. The highest grain yields were obtained under no-till (6912.2 kg/ha) and 60% residue treatment (6980.8 kg/ha). It is concluded that conservation tillage with more aboveground residue could improve wheat yield and some of physiological properties (RWC, ∆t, SPAD reading, FLA, ΨW and RI).