scholarly journals Roof Greening applied a Sallow Green Roof Module System Out of Management - Focused on the Effects on the Growth of Plants by Difference of Soil Mixture Ratio -

2012 ◽  
Vol 40 (3) ◽  
pp. 91-98 ◽  
Author(s):  
Tai-Ho Kang ◽  
Hong-Xia Zhao ◽  
Hong Li ◽  
Sung-Hoon Kang
Keyword(s):  
Green Roof ◽  
Mixture Ratio ◽  
Soil Mixture ◽  
Roof Greening ◽  
Roof Module ◽  
Module System

scholarly journals Effect of Fertilizer Rate on Plant Growth and Leachate Nutrient Content during Production of Sedum-vegetated Green Roof Modules

HortScience ◽  
2014 ◽  
Vol 49 (6) ◽  
pp. 819-826 ◽  
Author(s):  
Mary Jane Clark ◽  
Youbin Zheng
Keyword(s):  
Plant Growth ◽  
Green Roof ◽  
Control Plant ◽  
Nutrient Content ◽  
Green Roofs ◽  
Plant Production ◽  
Growth Differences ◽  
Roof Module ◽  
Cutting Production ◽  
Module System

With the increasing popularity of green roofs, efficient green roof plant production is required to adequately supply the industry. Applying fertilizer at an appropriate rate can provide sufficient plant nutrition for efficient plant growth without excess nutrient leaching into the environment. This study compared rates of controlled-release fertilizer (CRF) applied to green roof modules at the plant production stage to determine an optimum CRF rate for encouraging plant growth and vegetative coverage while minimizing the amount and concentration of leached nutrients. After sedum cuttings were rooted in green roof modules on 29 Aug. 2011, CRF was applied at 5, 10, 15, 20, 25, 30, and 35 g·m−2 nitrogen (N) and modules were compared with an unfertilized control. Plant growth, vegetative coverage, and overall appearance requirements were met after fertilization at 20 g·m−2 N. Modules fertilized at less than 20 g·m−2 N did not reach the target proportion coverage during the study. When fertilized at 20 g·m−2 N, green roof modules reached the target proportion coverage after 240 days of growth. Differences in leachate volumes were observed among treatments 35 days after fertilization and fertilization at 20 g·m−2 N minimized leaching of most nutrients. Therefore, with the green roof module system used in this study, an application of 20 g·m−2 N for green roof module or sedum cutting production is an optimum CRF rate for plant growth and vegetative coverage while minimizing negative environmental impacts.

scholarly journals Plant Nutrition Requirements for an Installed Sedum-Vegetated Green Roof Module System: Effects of Fertilizer Rate and Type on Plant Growth and Leachate Nutrient Content

HortScience ◽  
2013 ◽  
Vol 48 (9) ◽  
pp. 1173-1180 ◽  
Author(s):  
Mary Jane Clark ◽  
Youbin Zheng
Keyword(s):  
Plant Growth ◽  
Organic Fertilizer ◽  
Green Roof ◽  
Nutrient Content ◽  
Chicken Manure ◽  
Plant Performance ◽  
Fertilizer Rate ◽  
Shoot Height ◽  
Roof Module ◽  
Module System

The objectives of this study were to compare fertilizer rates and types to identify an optimum rate to maintain green roof vegetative coverage and encourage plant growth (i.e., plant performance) while minimizing the amount and concentration of nutrients leached from a green roof module system. Sedum-vegetated modules with no added fertilizer (control) were compared with modules fertilized with 5, 7.5, 10, 15, 20, 30, and 60 g·m−2 nitrogen (N) of 16N–2.6P–10K POLYON® Homogenous NPK plus Minors, 5–6 month controlled-release fertilizer (CRF), 5 g·m−2 N of a 2.9N–2.2P–2.3K fly-larvae processed chicken manure fertilizer (5-Sus), or 5 g·m−2 N of 4N–4P–4K Gaia Green All Purpose organic fertilizer (5-OR). The total amount and concentration of aluminum (Al), calcium (Ca), cadmium (Cd), chromium (Cr), copper (Cu), iron (Fe), mercury (Hg), potassium (K), magnesium (Mg), sodium (Na), NH4+, nickel (Ni), NO3–, phosphorus (P), lead (Pb), sulfur (S), and zinc (Zn) in leachate as well as plant overall appearance, winter injury, vegetative coverage, shoot height, bloom duration, and leaf color of green roof modules were evaluated between July 2011 and Aug. 2012. A CRF fertilizer rate of 15 g·m−2 N maximized vegetative coverage and overall plant appearance while maintaining leachate quality within Ontario and Canadian guidelines for most of the measured elements. The amount of Zn in the CRF appeared to be higher than plant demand and the high amount and concentration of P in leachate was likely the result of release from the growing substrate. The 5-Sus fertilizer resulted in increased coverage the first spring and increased greenness soon after application compared with the same rate of CRF. Overall, 15 g·m−2 N of CRF was the best treatment based on vegetative coverage and plant growth in sedum-vegetated green roof modules.

scholarly journals A planning tool of urban greenroofs

2021 ◽  
Author(s):  
Angela Yick Ting Au
Keyword(s):  
Green Roof ◽  
Green Roofs ◽  
Storm Water ◽  
Planning Tool ◽  
Soil Mixture ◽  
Roof System ◽  
Urban Green ◽  
Roof Structure ◽  
Industrial Buildings

Current research does not integrate these benefits in the planning of green roof systems. The objective of this research is to develop a planning tool to evaluate storm water and energy benefits of a green roof structure. To demonstrate the planning tool, a case study of urban green roofs was conducted for three different building scenarios: residential, commercial and industrial buildings. Using the data collected at York University's green roof, the seasonal storm water and energy benefits in dollar values of each scenario were simulated. The study concluded that it is more important to select a proper soil mixture and type of plant when designing a green roof system. By understanding the stormwater and energy benefits, it is hoped that this research could accrue through the adoption of green roofs in Toronto as well as other Canadian cities.

scholarly journals Vegetative traits of Sedum L. (Crassulaceae) species cuttings growing on green roof in Kyiv city

2021 ◽  
Vol 86 (3) ◽  
pp. 6-11
Author(s):  
A. Vozna ◽  
V. Berezkina ◽  
O. Vasheka
Keyword(s):  
Root System ◽  
Root Development ◽  
Green Roof ◽  
Projective Cover ◽  
Underground Part ◽  
Rooted Cuttings ◽  
Soil Mixture ◽  
Overground Part ◽  
Vegetative Traits

The traits of vegetative parts (the length of the overground part of the cutting (shoot), the length of the underground part of the cutting (rhizome), the volume of the overground part of the cutting (shoot), the volume of the root system, the weight of the cutting (plant), and absolute cover area) for cuttings of five Sedum species (S. ewersii Ledeb., S. spathulifolium Hook. 'Cape Blanco', S. kamtschaticum Fisch. 'Variegatum', Sedum spurium M. Bieb., S. rupestre L.) were determined. The plants were cultivated for 86 days on a low roof (height = 6 m), in a soil mixture in 7-liter containers with a substrate height of 7 cm. The percentage of rooted cuttings reached 100% for S. ewersii, S. kamtschaticum 'Variegatum', S. spurium, S. rupestre and 66 % for S. spathulifolium 'Cape Blanco'. The highest ability to create absolute substrate cover was noted for species with creeping stems and flattened succulent leaves – S. kamtschaticum 'Variegatum' and S. spurium. This index was slightly lower for a species with vertical stems and stiff pointed, succulent leaves (S. rupestre), and plants with decumbent stems, that bear only the terminal rosettes of leaves (S. ewersii). The ability to substrate consolidation was not significantly different for S. ewersii, S. kamtschaticum 'Variegatum', S. spurium. Root development was lower for S. rupestre and very weak for S. spathulifolium 'Cape Blanco'. The results support planting S. ewersii, S. kamtschaticum 'Variegatum', S. rupestre, S. spurium with fresh harvested cuttings without previous rooting. Cuttings of S. spathulifolium 'Cape Blanco' increased their mass and projective cover slowly and required rooting before planting in a green roof

scholarly journals Independent Validation of the SWMM Green Roof Module

2017 ◽  
Vol 22 (9) ◽  
pp. 04017037 ◽  
Author(s):  
Zhangjie Peng ◽  
Virginia Stovin
Keyword(s):  
Green Roof ◽  
Independent Validation ◽  
Roof Module

scholarly journals A planning tool of urban greenroofs

2021 ◽  
Author(s):  
Angela Yick Ting Au
Keyword(s):  
Green Roof ◽  
Green Roofs ◽  
Storm Water ◽  
Planning Tool ◽  
Soil Mixture ◽  
Roof System ◽  
Urban Green ◽  
Roof Structure ◽  
Industrial Buildings

Current research does not integrate these benefits in the planning of green roof systems. The objective of this research is to develop a planning tool to evaluate storm water and energy benefits of a green roof structure. To demonstrate the planning tool, a case study of urban green roofs was conducted for three different building scenarios: residential, commercial and industrial buildings. Using the data collected at York University's green roof, the seasonal storm water and energy benefits in dollar values of each scenario were simulated. The study concluded that it is more important to select a proper soil mixture and type of plant when designing a green roof system. By understanding the stormwater and energy benefits, it is hoped that this research could accrue through the adoption of green roofs in Toronto as well as other Canadian cities.

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