| Walnuts are rich in nutritional value and are loved by consumers.They are also one of the world’s four major dried fruits.Demand for walnuts is constantly increasing.However,in the process of walnut planting,the yield and quality of walnut dried fruit are affected due to the relatively backward cultivation techniques.In this test,"Zhonglin No.1" in walnut orchard in Xiaoyi City,Shanxi Province was used as the research material,and the effects of two cultivation treatments,such as fertigation technology and plant growth regulators,on its growth and yield were analyzed in order to provide relevant information for walnut production Reference.The findings are as follows:The fertigation technology can promote the growth and yield of walnut trees in Xiaoyi area,specifically as follows:(1)At the four sampling time points in this experiment,the integrated fertigation technology treated the content of chlorophyll a and chlorophyll b in the leaves of walnut trees both were significantly higher than the control group;(2)The new shoots increased by 26.1cm and 15.77 cm,and the base thickness increased after treatment with the fertigation technology S1(NPK water and fertilizer)and S2(1/2 NPK water and fertilizer)compared with the control group,the base thickness rate reached 19.35%and 8.02%,and the growth rate of the central coarseness reached 25.64% and 20.17%.(3)After treatment with S1 and S2,the weight of fresh fruit per plant was increased by 2.88 g and 2.05 g compared with the control(12.23g),and the yield per plant was increased by 23.26% and 21.05% compared with the control(13.11kg).(4)Compared with the control group,the appearance and quality indicators of the integrated fertigation technology S1 and S2 have a transverse diameter increase of 2.46 mm and 1.33 mm,a longitudinal diameter increase of 3.83 mm and 2.85 mm,and a lateral diameter increase 2.47 mm and1.56 mm,shell thickness decreased by 0.03 mm and 0.02 mm,dried fruit weight increased by 27.74% and17.32%,nut weight increased by 29.54% and 17.58%,and kernel yield increased by 0.9% and 0.14%respectively.Fertigation technology treatment can effectively improve the appearance quality of walnuts.The application of two plant growth regulators,uniconazole and cycocel,can help regulate the growth and increase of yield of walnut trees in Xiaoyi area.The specific performance is as follows:(1)Spraying200-400mg/L uniconazole and 400-800mg/L cycocel can significantly increase the content of chlorophyll a and chlorophyll b in tree leaves.(2)The use of 200mg/L uniconazole and 400mg/L cycocel can reduce the canopy width of walnut trees by 1.22m2 and 1.52m2 compared with the control group,and the area of the top leaflets increased by 21.79m2 and 13.1m2,the area of the side leaflets increased by 6.25m2 and 5.9m2,respectively.It can be seen that the use of appropriate concentrations of uniconazole and cycocel have a significant inhibitory effect on the growth of walnut canopy,but have a significant promotion effect on the growth of the parietal and lateral leaflet area.(3)The use of 200mg/L uniconazole can promote the growth of new shoots of walnut trees by 2.16 cm,and the thickness of the base and middle of the new shoots increased by 3.16% and 2.29%,respectively.However,cycocel did not significantly increase the new shoot length,base thickness and middle thickness of walnut trees.Uniconazole and cycocel had no significant effect on walnut tree bud density and fruit set rate.(4)The use of 200mg/L uniconazole and 400mg/L cycocel can increase the fresh fruit weight of walnuts by 2.13 g and 1.8g,respectively,and increase the yield per plant by 21.4% and 12.96%,respectively.(5)After application of uniconazole,the dried fruit weight,kernel weight and kernel yield of the walnut were significantly higher than those of the control group,while other appearance quality indicators were not significantly different from those of the control group.There were no significant differences in all appearance quality indexes of walnuts after the application of cycocel. |
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