Effects of Slow-Release Fertilizer on Fruit Quality and Photosynthetic Performance of Juglans regia L.
In order to investigate the effect of slow-release fertilizer on Juglans regia L.fruit quality and leaf pho-tosynthetic performance,'Wen 185'Juglans regia L.was used as the test material,and five treatments were set up with conventional fertilization(CK)and different gradients of slow-release fertilizer to study the appearance quali-ty and intrinsic quality of Juglans regia L.fruits.The test results showed that slow-release fertilizer had different degrees of promotion effect on Juglans regia L.fruit quality and yield.Under the condition of different treatments,the size of fat content was F2＞F1＞F3＞F4＞CK,and the difference between F2 treatment and CK treatment reached a significant level,which was 15.77％higher than that of CK treatment;the content of protein under dif-ferent treatments was F1＞F2＞F4＞F3＞CK,and the F1 treatment was higher than that of CK treatment by 0.67 mg/g;the difference between kernel yield of CK treatment and that of the treatments was highly significant.Pn,Gs and WUE as a whole showed the trend of"decreasing-rising-decreasing",and the indicators as a whole were sig-nifiicantly higher than CK,while Ci as a whole was significantly lower than CK;leaf SPAD value with the increase in the amount of large-grain fertilizer application showed the trend of"high-low-high",and reached the level of"high"in the F3 treatment,which was the first time in the F3 treatment.The leaf SPAD value showed a"high-low-high"trend with the increase of large-grain tree fertilizer application,and reached a peak in F3 treatment;during the whole reproductive period,the net photosynthetic rate,transpiration rate,stomatal conductance,water use rate and SPAD of F3 treatment were 8.43％,10.88％,1.38％,15.4％and 1.96％higher than that of CK,and the a-mount of fertilizer applied to CK was 173％higher than that of F3 treatment.In Juglans regia L.production,the application of slow-release fertilizer can save costs and increase efficiency,and the fruit quality,yield and leaf photosynthesis of Juglans regia L.under the application of slow-release fertilizer 600～800 g/plant were better.
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