نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی دکتری زراعت و اصلاح نباتات ، واحد لاهیجان، دانشگاه آزاد اسلامی، لاهیجان ، ایران
2 گروه زراعت و اصلاح نباتات، واحد لاهیجان، دانشگاه آزاد اسلامی، لاهیجان ، ایران.
3 گروه مهندسی آب، دانشگاه آزاد اسلامی واحد لاهیجان، لاهیجان
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In order to investigate the effect of nitrogen fertilizer, plant densities and irrigation treatments on yield and water productivity in maize, a study was conducted as a split factorial experiment in a randomized complete block design with 3 replications in 2017 and 2018 in Gilan province.The main plots were irrigation treatments (complete irrigation, non-irrigation) and sub-plots with four levels of nitrogen fertilizer application (0, 100, 200 and 300 kg ha-1) and three levels of planting density (10, 20 and 30 cm per row). Analysis of variance showed significant differences between treatments on yield, yield components and water productivity. Results of mean comparison showed that the highest grain yield, biological yield, number of kernels per ear, ear length, harvest index in complete irrigation treatments with 300 kgN/ha and 75×20 density and highest plant height in irrigation and 300 kgN/ha treatments and density of 75×10 were obtained. In addition, the highest grain and biological water productivity were 1.85 and 3.53 kg/m3 for full irrigation and consumption of 300 kgN/ha nitrogen fertilizer, respectively. The final results showed that although annual rainfall was high in the study area, complete irrigation and 75×20 densities and 300 kgN/ha were recommended as the best experimental treatment to achieve optimal corn yield.
کلیدواژهها [English]