The effects of substrates on growth and green coverage of Blue daze (Evolvulus glomeratus) under rooftop condition

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Research Articles | Published:

Print ISSN : 0970-4078.
Online ISSN : 2229-4473.
Pub Email:
Doi: 10.1007/s42535-021-00298-8
First Page: 237
Last Page: 243
Views: 864

Keywords: Agronomy, Blue daze, Rooftop condition, Substrate, Thickness


Establishment of the green space in urban environment has been regarded as one of the major strategies for the development of green cities. In this study, we provided experimental evidence for the uses of biochar-based substrates for the growth and development of blue daze (Evolvulus glomeratus) plants under the rooftop condition. We firstly analyzed the physical features of four common substrates, including 100% soil, soil + rice hull + coconut fiber (2:1:1), soil + coconut fiber + rice hull + coal slag (1:1:1:1) and soil + coconut fiber + rice hull + coal slag (1:2:2:1) to gain an advantages under the rooftop condition. Subsequently, the evaluation of the growth and development of the blue daze (Evolvulus glomeratus) in four formulas under the rooftop condition was investigated. Among them, the use of soil + coconut fiber + rice hull + coal slag (1:1:1:1) exhibited the highest values of growth dynamics and green coverage. Additionally, the effects of three thicknesses (5, 8, and 12 cm) of a selected formula were tested under the rooftop condition. The results revealed that the surface area of green coverage exhibited the highest value, by 1964.13 cm2 at 90 days after planting in a depth layer of 8 cm. Taken together, our study could provide a solid foundation for further cultivation of blue daze plants under the rooftop condition.

Agronomy, Blue daze, Rooftop condition, Substrate, Thickness

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Author Information

Nguyen Anh Duc
Faculty of Agronomy, Vietnam National University of Agriculture, Hanoi, Vietnam

Chu Ha Duc
Faculty of Agricultural Technology, University of Engineering and Technology, Vietnam National University Hanoi, Hanoi City, Vietnam

Nguyen Van Loc
Faculty of Agronomy, Vietnam National University of Agriculture, Hanoi, Vietnam