In the present work,ginger cultivar Laiwu ginger was used as the test material,a greenhouse□pot experiment was conducted to investigate the effects of 5 different levels(2.5,5.0,7.5,10.0 and 12.5 g·plant-1)of Ca(NO3)2 on growth,yield and the quality of ginger by adding it to the rhizosphere.The results showed that exogenous Ca(NO3)2 appli-cation promoted the growth of ginger,increased leaf pigment content,net photosynthetic rate,and rhizomes'yield and quality.When the Ca(NO3)2 applied dosage was≥7.5 g·plant-1,it had a significant effect on ginger growth,yield,and quality improvement.And the promoting effect was most significant at 10.0 g·plant-1.At the harvest period,compared with no applying Ca(NO3)2(CK),the chlorophyll content and photosynthetic rate of ginger leaves increased by 21.44% and 34.37%,respectively,and the yield increased by 44.22%;the content of soluble sugar,soluble protein,amino acids,and vitamin C increased by 28.13%,36.52%,19.15%,and 17.49%,respectively.In summary,exogenous Ca(NO3)2 within the experimental range promoted the growth and yield of ginger,improved the quality of ginger rhizomes.The treatment with exogenous Ca(NO3)2 application rate of 10.0 g·plant-1 was more conducive to improving yield and quality.
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