Effects of zinc fertilizer application on yield,quality and zinc accumulation in melon
A field experiment was conducted to investigate the effect of different Znic rate on yield,quality and the princi-ples of assimilation and accumulation of Zn element based on different fertilization.The experiment was conducted in Hexi Corridor from 2020 to 2021.A single factor randomized block design was used with Soil ZnSO4·7H2O rates of 0,15,30,45,60,and 75 kg·hm-2.By analyzing yield,quality and Zn concentrations in vegetative tissues of melon,the influ-ences on Zn distribution,and the relative contributions of Zn remobilization and post-anthesis shoot Zn uptake to seeds Zn accumulation were evaluated.Optimal results regarding single fruit mass and commercial fruit yield were obtained with a zinc application rate of 30 kg·hm-2,whereas highter levels for soluble solids content and vitamin C were recorded.The content of zinc in melon seeds was the highest,followed by leaf and pulp,and the lowest in stems.The stems was the lowest at seedling stage(2.88 mg·kg-1),and the seeds was the highest at maturity stage(63.40 mg·kg-1).When the amount of zinc was 30 kg·hm-2,the zinc content of seeds at maturity were 60.90 mg·kg-1(2020)and 57.32 mg·kg-1 (2021),and when the amount of zinc was 45 kg·hm-2,the zinc content of seeds were 63.40 mg·kg-1(2020)and 61.03 mg·kg-1(2021),respectively,which was higher than other zinc application levels.These findings indicate that melon plants exhibit their highest zinc absorption intensity during the maturity stage.The total accumulation of zinc of melon dur-ing the entire growth period ranged from 8.27 to 12.95 mg,with kernels being the primary site of zinc accumulation.Further-more,it was significantly promoted zinc absorption and accumulation when the the amount of zinc applied 30 kg·hm-2.The maximum zinc absorption intensity reached 0.37 mg·d-1(2020)and 0.32 mg·d-1(2021),and zinc absorption reached 7.30 mg(2020)and 6.27 mg(2021)at the expansion to maturity stage.Under the same condition,the zinc accu-mulation reached 12.78 mg(2020)和12.10 mg(2021).These results were similar to the application rate of 45 kg·hm-2,and higher than other treatments.Considering yield,quality,and zinc absorption and accumulation,the soil application of 30 kg·hm-2 zinc fertilizer considered as a suitable application scheme.
万方数据
维普
