Growth Responses of Sacaton Grass (Sporobolus airoides Torr.) and Seashore Paspalum (Paspalum vaginatum Swartz) Under Prolonged Drought Stress Condition

Pessarakli, Mohammad

doi:10.15406/apar.2017.07.00261

Cited by 1 publication

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An important observation from the study was that the green coverage of the P. vaginatum turfgrass consistently remained high, exceeding 90% across all treatments. This finding demonstrates the remarkable resilience of seashore paspalum to elevated salinity levels [32,33] and highlights the potential for irrigating P. vaginatum turfgrass in extensive green roofs with water with an EC of up to 12 dS m −1 for extended periods without a significant deterioration in visual quality. According to Figure 3, the relationship between σb and εb is strongly linear for al levels of ECi for both substrate depths of 7.5 cm and 15 cm, and the correlation coefficient R 2 decreases with increasing ECi.…”

Section: Resultsmentioning

confidence: 61%

“…Observing the slopes of the σb-εb relationships, which are equal to the value of the salinity index (Xs), for both substrate depths, they increase with the increase in the EC An important observation from the study was that the green coverage of the P. vaginatum turfgrass consistently remained high, exceeding 90% across all treatments. This finding demonstrates the remarkable resilience of seashore paspalum to elevated salinity levels [32,33] and highlights the potential for irrigating P. vaginatum turfgrass in extensive green roofs with water with an EC of up to 12 dS m −1 for extended periods without a significant deterioration in visual quality.…”

Section: Resultsmentioning

confidence: 61%

See 1 more Smart Citation

Use of a Dielectric Sensor for Salinity Determination on an Extensive Green Roof Substrate

Kargas,

Ntoulas,

Tsapatsouli

2023

Sensors

View full text Add to dashboard Cite

The irrigation of extensive green roofs with recycled or saline water could contribute to the conservation of valuable drinking water supplies. In such cases, the continuous monitoring of substrate electrical conductivity (ECsw) is of immense importance for the sustainable growth of the plants growing on the green roof. The present study aimed to estimate the ECsw (pore water EC) of an extensive green roof substrate in lysimeters with the use of the WET-2 dielectric sensor. Half of the 48 lysimeters that simulated extensive green roofs had a substrate depth of 7.5 cm, while the other half had a 15 cm substrate depth. The warm season turfgrass Paspalum vaginatum ‘Platinum TE’ was established at the lysimeters, and during the summer period, it was irrigated every two days at a rate of 14 mm with NaCl solutions of various electrical conductivities (ECi): a) 3 dS m–1, b) 6 dS m–1, and c) 12 dS m–1, while potable water of 0.3 dS m–1 ECi served as the control. The relation between bulk electrical conductivity, σb, and bulk dielectric permittivity, εb, of the substrate was observed to be linear for all ECi levels up to σb values of 2–2.5 dS m–1. The ECsw was predicted by employing the salinity index method which was modified to be applied to the particular case of a green roof substrate. Knowing the salinity index and organic portion (%, v/v) for a given green roof substrate, we could calculate the ECsw. It was found that the use of the salinity index method predicts reliably the ECsw up to 10–11 dS m–1, while the method overestimates ECsw at very low levels of electrical conductivity.

show abstract

Section: Resultsmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 61%