نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی دکتری علوم و مهندسی خاک، گروه علوم و مهندسی خاک، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران.
2 استادیار گروه علوم و مهندسی آب، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران.
3 استاد گروه علوم و مهندسی خاک، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران.
4 استادیار گروه علوم و مهندسی خاک، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران.
5 استاد گروه علوم و مهندسی آب، دانشگاه بین المللی امام خمینی(ره)، قزوین، ایران.
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
This research investigated the wet yield and periodic evapotranspiration of maize (Zea mays L. Var. Sc. 704), under the influence of different amounts of water and fertilizer. A two-factor factorial experiment was conducted in the form of randomized complete block design in two crop years, 2020 and 2021, in Aliabad Fashapuyeh District, Hasanabad Division, Ray County (Tehran Province). Water treatments included three levels of W0, W1, and W2 and three levels of fertilizer, F0, F1 and F2, which were carried out by supplying 100%, 75% and 50% of water requirement based on soil moisture deficiency and fertilizer was based on soil test for macro-nutrients of fodder corn, respectively. The results showed that, along with the increase in water and fertilizer stress, the two-year average amount of yield and applied water (total evapo-transpiration) decreased by 27.6% and 46.8%, respectively, so that the yield decreased from 50.4 to 36.5 t/ha and applied water decreased from 694 to 369 mm. The simple and interactive effects of treatments on yield and periodic applied water were significant at the 95% probability level. The results of modeling the relative yield of the crop based on periodic relative ET values indicate the suitability of Singh's sum-able and Rao's multiplicative model in the conditions of water and fertilizer stress. In total, the results showed that the production of fodder corn was firstly dependent on the volume of irrigation water and then on the supply of nutrients. The highest biological yield after the control treatment (W0F0) was related to the application of the W0F1 treatment. Also, a positive and significant correlation between the total evapotranspiration with the yield (R=0.94) was proved. On the other hand, no significant yield difference was observed between the three treatments W1F0, W1F1 and W1F2. Therefore, in the condition of irrigation water shortage, the W1F2 treatment is more economical than the other treatments. W1 and the square root production function with RMSE, R2 and NS statistics of 0.42, 0.98 and 0.97, respectively, is a more suitable function for estimating yield with water and fertilizer consumption compared to the functions of Logistics and Cobb Douglas. It was found that, in the conditions of inadequate water and macro nutrients, not only ET of different stages of growth can be increased by management of fertilizer consumption, but also plant performance was completely dependent on the correct management of water and fertilizer consumption.
کلیدواژهها [English]
https://doi.org/10.4141/cjss95-071
https://doi.org/10.1016/j.plaphy.2016.10.008