《Table 4 Effect of different treatments on iron-deficiency chlorosis at the flowering stage》

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《"Effect of slow-release iron fertilizer on iron-deficiency chlorosis, yield and quality of Lilium davidii var.unicolor in a two-year field experiment"》

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The changes in chlorophyll content of L.davidii var.unicolor in different treatments at different stages of growth are presented in Figure 2.The chlorophyll content increased gradually and reached the maximum in the budding stage and then decreased significantly to reach the minimum in the flowering stage during the two-year experiment.The maximum of chlorophyll content was in the B treatment at each growth stage，following with the second highest chlorophyll content in the A treatment，which were significantly higher than that in C and D treatments.The chlorophyll content in C treatment was significantly higher than that in the D treatment in the budding stage in 2016，but the difference between the chlorophyll contents in C and D treatments was not significant in the other growth stages during the experiment.The increase in chlorophyll content in the two slow-release iron fertilizers treatments（A and B）was also an indication that the slow-release fertilizers could reduce the rate of iron chlorosis（Table 4），which might be due to increased supply of available iron from the slow-release iron fertilizers to meet the requirements of the different growth stages of L.davidii var.unicolor.