TRITICAM AESTIVUM L اثر محلول پاشي اوره پيش از گلدهي بر عملكرد و درصد پروتيين دانه دو رقم گندم

Effect of pre-anthesis urea foliar application on yield, yield components and grain protein percent of two winter wheat (Triticum aestivum L.)

The efforts to increase the grain yield per unit area of wheat is unavailable due to limited area under cultivation. Macronutrients such as nitrogen can play an important role in increasing grain yield per unit area. N added to the soil might become unavailable to the crop due to leaching or volatilization. Foliar feeding of nitrogen appears to be important in improving both quantity and quality of wheat grain. To investigate the effect of foliar feeding of urea on grain yield and protein percent of two winter wheat cultivars, (Alvand and Barkat), a factorial field experiment was carried out using Randomized Complete Block Design with three replicates, during 1376-1377 (1997-1998) at Agricultural Service Center of Faridan in Isfahan province. Nitrogen was applied at booting stage in four levels (0, 10, 20, and 40 kg ha-1. The results showed that foliar feeding of urea at booting stage can significantly increase the grain yield. Such yield increase was mainly due to an increase in number of grain/ear. There was no significant change in mean kernel weight, and fertile shoots per unit area. Higher levels of urea spraying was associated with greater biological yield. It was shown that foliar feeding of urea at booting stage can significantly increase the grain protein percent of two winter wheat cultivars, Alvand and Barkat. The Barkat cultivar had a higher response in increasing protein percent than the Alvand cultivar.