Effects of nitrogen fertilizer and titanium ion on photosynthetic traits and agronomic characters of Avena sativa L.
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.
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