Effects of Nitrogen and Zinc Spray on Yield of Corn (Zea Mays L.) in Drought Stress

摘要: In hot and arid regions, drought stress is considered as one of the main reasons for yield reduction. To study effect stress, nitrogen zinc spray on components corn, an experiment was carried out during crop seasons 2010 2011 Emam Khomeyni research Farm in Mahvellat a split factorial within randomized complete block design with three replicates. The plots irrigation factor levels were considered: full irrigation, stopping at anthesis step seed filling stage. Subplots without spray. reduced grain stage more than other stages. Drought effects significantly stem ear diameter, length, chlorophyll value, leaf area index, relative water content, stem, leaves dry weight, number row, row ear, unfilled percentage thousand grains weight. Nitrogen increased component except weight ear. Using Zn, compared control treatment, causes increase yield, 16.5, 9 5.5%, respectively. results obtained from present showed that most sensitive to stress. Also Zn could somewhat reduce impact corn.