Effect of combined application of magnetized water and mineral-derived potassium fulvate on water-salt changes in red jujube rhizosphere soil and yield of red jujube
To explore the combined effects of magnetized water and mineral-derived potassium fulvate on soil water and salt distribution,as well as the growth,development,and yield of red jujube in the southern Xinjiang region,a two-factor split-plot experimental design was adopted.The main factor was the level of water magnetization treatment,while the secondary factor was the application rate of mineral-de-rived potassium fulvate.The results showed that compared with control,the combined application of magnetized water and mineral-derived fulvate potassium could significantly in-crease soil water storage capacity,water content,and desalination rate.The combined application of magnetized water and miner-al-derived fulvate potassium had a better effect on salt leaching in soil at a depth of 0-80 cm.When the magnetization level was the same,as the application rate of mineral-derived fulvate potassium increased,the length and diameter of the new shoots of red jujube first increased and then decreased.At 85 days,the length and diameter of the new shoots treated with M2F3(the level of magnetization was 3 000 Gs and the level of mineral-derived potassium fulvate application was 75 kg/hm2)were the largest,which were significantly higher than those of other treatments(P<0.05).In addition,the M2F3 treatment showed the best per-formance in terms of the longitudinal and transverse diameters,single fruit weight,and yield of red jujube.Through comprehen-sive analysis and evaluation using the entropy weight-TOPSIS method,the optimal application rate of mineral-derived fulvate po-tassium under water magnetization treatment was 89.44 kg/hm2,while under non-magnetized water treatment,the optimal appli-cation rate was 110.60 kg/hm2.In summary,it is recommended to adopt the combined mode of drip irrigation with magnetized water and application of 75 kg/hm2 mineral-derived fulvate potassium for cultivating red jujube in southern Xinjiang.This study provides a theoretical basis for efficient production of red jujube and improvement of saline-alkali soil in southern Xinjiang.
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