In order to increase the absorption and utilization efficiency of nitrogen by plants,we carried on a completely random test design with urea and titanium ions(Ti 4 +)as the influencing factors,to explore the effects of photosynthetic physiology and agronomic characters of oat,such as the net photosynthesis rate,water use efficiency,plant height,number of tillers as well as forage yield.The re-sults showed that nitrogen significantly increased the stomatal conductance,intercellular carbon dioxide concentration,fresh grass yield,hay yield,stem weight,leaf weight,and leaf area index of oats(P<0.05).It also had a certain promoting effect on the net photosyn-thetic rate.Moreover,the titanium ions significantly increased the net photosynthetic rate,fresh grass yield,and leaf area index of oats(P<0.05).Interestingly,the combined application of nitrogen fertilizer and titanium ions has a synergistic effect on the photosynthetic physiology and productivity.When applying 90kg/hm2 urea + foliar spray 800 fold of titanium ion dilution solution(the concentration of Ti4 + about 4.38mg/L),the forage yield and photosynthetic traits of oat can be optimized,which is the best method for applying in oat for-age production.
维普
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