Plant physiology, biochemistry and molecular biology

Effects of Nitrogen Exponential Fertilization on Growth and Photosynthetic Characteristics of Melastoma candidum Seedlings

  • 李冰敏,卓定龙,谢伟文,方必君,刘晓洲,谭广文
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  • (Pubang Landscape Architecture Co., Ltd., Guangzhou 510600, Guangdong China)

Received date: 2023-06-06

  Accepted date: 2023-07-07

  Online published: 2023-11-28

Abstract

In this study, one-year-old Melastoma candidum cutting seedlings were used as experimental materials, and five gradients of N index fertilization treatments (total nitrogen 1, 3, 5, 7 and 9 g per plant, respectively) were set up. In addition, no fertilization and average fertilization (total nitrogen application was 5 g per plant) were set as control treatments. The effects of nitrogen fertilizer exponential fertilization on the growth of M. candidum seedlings were discussed by measuring mortality, seedling height, ground diameter, biomass, chlorophyll SPAD value and photosynthetic characteristics, combined with membership function analysis. The results showed that treatment 4 (17.50 g nitrogen fertilizer per plant) was the most significant, and its seedling height, ground diameter, biomass, net photosynthetic rate, stomatal conductivity, intercellular CO2 concentration, transpiration rate and water use efficiency could reached the maximum value, but root-shoot ratio and stomatal limitation value reached the minimum value. The comprehensive value of membership function of treatment 4 was the highest. Therefore, we concluded that the exponential fertilization treatment 4 had the best fertilization effect for M. candidum, that was, the exponential fertilization treatment of 17.50 g nitrogen fertilizer per plant.

Cite this article

李冰敏,卓定龙,谢伟文,方必君,刘晓洲,谭广文 . Effects of Nitrogen Exponential Fertilization on Growth and Photosynthetic Characteristics of Melastoma candidum Seedlings[J]. Subtropical Plant Science, 2023 , 52(4) : 287 -292 . DOI: 10.3969/j.issn.1009-7791.2023.04.002

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