اثر محلولپاشی مواد ضدتنش و ضدتعرق بر عملکرد و برخی صفات مورفولوژیکی سویا در رژیمهای مختلف آبیاری

In order to study the effect of anti-stress and anti-transpiration materials on yield and some morphological characteristics of soybean under different irrigation regimes, two experiments were conducted as a split plot based on randomized complete block design with four replications during two cropping seasons of 2011 and 2012 at the experimental farm of University of Maraghe. The experimental treatments were irrigation regimes including irrigation after 40, 80 and 120 mm evaporation from “class A” pan, respectively as the main plots and foliar application of anti-stress and anti-transpirant including non-foliar application, castor oil 1%, 500 ppm cycocel, 450 ppm Masraiz and 450 ppm Serval- Nk as the subplots. Results showed that the effect of irrigation regimes on plant height, leaf and pod number per plant was significant, so that drought stress led to a significant reduction in those values compared to the control. From the standpoint of number of leaves on plant, all foliar application treatments and in the point of number of pods in plant, Cycocel, Masraiz and Serval-Nk increased values of these traits compared to control significantly. The highest (4288 kg/ha) and the lowest (1915 kg/ha) grain yield of soybean obtained from irrigation after 40 mm evaporation from pan and application of Serval-Nk and irrigation after 120 mm evaporation without foliar application, respectively.
In order to study the effect of anti-stress and anti-transpiration materials on yield and some morphological characteristics of soybean under different irrigation regimes, two experiments were conducted as a split plot based on randomized complete block design with four replications during two cropping seasons of 2011 and 2012 at the experimental farm of University of Maraghe. The experimental treatments were irrigation regimes including irrigation after 40, 80 and 120 mm evaporation from “class A” pan, respectively as the main plots and foliar application of anti-stress and anti-transpirant including non-foliar application, castor oil 1%, 500 ppm cycocel, 450 ppm Masraiz and 450 ppm Serval- Nk as the subplots. Results showed that the effect of irrigation regimes on plant height, leaf and pod number per plant was significant, so that drought stress led to a significant reduction in those values compared to the control. From the standpoint of number of leaves on plant, all foliar application treatments and in the point of number of pods in plant, Cycocel, Masraiz and Serval-Nk increased values of these traits compared to control significantly. The highest (4288 kg/ha) and the lowest (1915 kg/ha) grain yield of soybean obtained from irrigation after 40 mm evaporation from pan and application of Serval-Nk and irrigation after 120 mm evaporation without foliar application, respectively.