scholarly journals Revegetation in abandoned quarries with landfill stabilized waste and gravels: water dynamics and plant growth – a case study

2017 ◽  
Author(s):  
Cheng-liang Zhang ◽  
Jing-jing Feng ◽  
Li-ming Rong ◽  
Ting-ning Zhao
Keyword(s):  
Plant Growth ◽  
Water Content ◽  
Robinia Pseudoacacia ◽  
Water Dynamics ◽  
Leaf Water Content ◽  
Rock Fragments ◽  
Platycladus Orientalis ◽  
Concrete Production ◽  
Uppermost Layer ◽  
Pavement Construction

Abstract. Large amounts of quarry wastes are produced during quarrying. Though quarry wastes are commonly used in pavement construction and concrete production, in-situ utilization during ecological restoration of abandoned quarries has its advantage of simplicity. In this paper, rock fragments of 2 ~ 3 cm in size were mixed with landfill stabilized waste (LSW) in different proportions (LSW: gravel, RL), which was called LGM. The water content, runoff and plant growth under natural precipitation were monitored for two years using a runoff plot experiment. LGM with a low fraction of LSW was compacted in different degrees to achieve an appropriate porosity; water dynamic and plant growth of compacted LGM were studied in a field experiment. The results showed that, (1) LGM can be used during restoration in abandoned quarries as growing material for plants. (2) RL had a significant effect on infiltration and water holding capacity of LGM, and thus influenced retention of precipitation, water condition and plant growth. LGM with RL ranging from 8 : 1 to 3 : 7 was suitable for plant growth, but the target species grew best when RL was intermediate. (3) Compaction significantly enhanced water content of LGM with a low RL of 2 : 8, but leaf water content of plants was lower or unchanged in the more compacted plots. Moderate compaction was beneficial to the survival and growth of Robinia pseudoacacia. Platycladus orientalis and Medicago sativa were not significantly affected by compaction, and they grew better under high degree of compaction which was disadvantageous for the uppermost layer of vegetation.

scholarly journals Revegetation in abandoned quarries with landfill stabilized waste and gravels: water dynamics and plant growth – a case study

Solid Earth ◽  
2017 ◽  
Vol 8 (6) ◽  
pp. 1131-1139
Author(s):  
Cheng-liang Zhang ◽  
Jing-jing Feng ◽  
Li-ming Rong ◽  
Ting-ning Zhao
Keyword(s):  
Plant Growth ◽  
Water Content ◽  
Robinia Pseudoacacia ◽  
Water Dynamics ◽  
Leaf Water Content ◽  
Rock Fragments ◽  
Platycladus Orientalis ◽  
Concrete Production ◽  
Pavement Construction ◽  
Robinia Pseudoacacia L

Abstract. Large amounts of quarry wastes are produced during quarrying. Though quarry wastes are commonly used in pavement construction and concrete production, in situ utilization during ecological restoration of abandoned quarries has the advantage of simplicity. In this paper, rock fragments 2–3 cm in size were mixed with landfill stabilized waste (LSW) in different proportions (LSW : gravel, RL), which was called LGM. The water content, runoff and plant growth under natural precipitation were monitored for 2 years using a runoff plot experiment. LGM with a low fraction of LSW was compacted to different degrees to achieve an appropriate porosity; water dynamics and plant growth of compacted LGM were studied in a field experiment. The results showed the following: (1) LGM can be used during restoration in abandoned quarries as growing material for plants. (2) RL had a significant effect on the infiltration and water-holding capacity of LGM and thus influenced the retention of precipitation, water condition and plant growth. LGM with RL ranging from 8:1 to 3:7 was suitable for plant growth, and the target species grew best when RL was 5:5. (3) Compaction significantly enhanced water content of LGM with a low RL of 2:8, but leaf water content of plants was lower or unchanged in the more compacted plots. Moderate compaction was beneficial to the survival and growth of Robinia pseudoacacia L. Platycladus orientalis (L.) Franco and Medicago sativa L. were not significantly affected by compaction, and they grew better under a high degree of compaction, which was disadvantageous for the uppermost layer of vegetation.

Studies of the tolerance of Atriplex species. 1. Environmental characteristics and plant response of A. vesicaria, A. nummularia and A. semibaccata

1967 ◽  
Vol 7 (24) ◽  
pp. 39 ◽  
Author(s):  
CT Gates ◽  
W Muirhead
Keyword(s):  
Plant Growth ◽  
Water Content ◽  
Leaf Water ◽  
The Other ◽  
Leaf Water Content ◽  
Seasonal Fluctuations ◽  
Adverse Conditions ◽  
Plant Life ◽  
Extremes Of Temperature ◽  
Seasonal Extremes

The effect of climate on the growth of three species of Atriplex viz., A. vesicaria Heward, A. nummdaria Lindl., and A. semibaccata R. Br., was measured for two years in the Riverine plains area of Australia. A single harvest of Kochia georgii R. Br, was also made. Plant life in the area is exposed to the stresses of wide diurnal and seasonal extremes of temperature and humidity and to low rainfall, with high actual evaporation and evapotranspiration rates during the summer. The plants also grow in soils that are highly saline with an unfavourable ratio of sodium to potassium contents. Despite these adverse conditions for plant growth the Atriplex species and Kochia georgii were well adapted and had high leaf weight ratios. The species were summer growers. A. semibaccata was dormant in the winter, but the other Atriplex species remained green and healthy, although they grew very little during the winter. The ratios of leaf to stem weights and the leaf water content showed seasonal fluctuations in the Atriplex species, but these were modified in accord with previous rainfall and evaporation rates. The remarkable capacity of Atriplex species to remain leafy and viable, under such adverse conditions, as were observed, is a major factor contributing to its pastoral importance in these inland areas.

The Effect of Water Stress on the Physiology of Vinca major 'Variegata'

2013 ◽  
Vol 409-410 ◽  
pp. 782-787 ◽  
Author(s):  
Fei Yong Liao ◽  
Ying Xie ◽  
Hui Jiang
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Plant Growth ◽  
Water Content ◽  
Net Photosynthetic Rate ◽  
Photosynthetic Rate ◽  
Irrigation Water ◽  
Robinia Pseudoacacia ◽  
Effect Of Water ◽  
Vinca Major

The effects of water stress on the two year old Vinca majorVariegata were tested for proving the irrigation guidance for its application in the garden. The results showed that the water flood and the drought stress suppressed the plant growth. After treated with flooding for 13days, the qP, ETR, Fv'/Fm' and net photosynthetic rate were decreased, but the qN were increased and the plants were dead. The mid drought stress (the water content of soil were between 20 percent and 30 percent) slightly affected the growth of plant, which embodies in the slight decline of chlorophyll, qP, ETR, Fv'/Fm', Fv/Fm and qP, the ascend of net photosynthetic rate. Drought Stress badly affected the growth of plant, which embodies in the decline of chlorophyll, qP, ETR, Fv'/Fm', Fv/Fm, qP and net photosynthetic rate. The best irrigation for plant was the water content of soil between 20 percent and 30 percent, which does not affect the ornamental value of Robinia pseudoacacia and save the irrigation water. So the application of V. majorVariegata should avoid in the place for over 13 days water flood.

scholarly journals Leaf water content estimation using top-of-canopy airborne hyperspectral data

2021 ◽  
Vol 102 ◽  
pp. 102393
Author(s):  
Rahul Raj ◽  
Jeffrey P. Walker ◽  
Vishal Vinod ◽  
Rohit Pingale ◽  
Balaji Naik ◽  
...  
Keyword(s):  
Water Content ◽  
Hyperspectral Data ◽  
Leaf Water ◽  
Leaf Water Content

scholarly journals Simulating Heat Stress of Coal Gangue Spontaneous Combustion on Vegetation Using Alfalfa Leaf Water Content Spectral Features as Indicators

2021 ◽  
Vol 13 (13) ◽  
pp. 2634
Author(s):  
Qiyuan Wang ◽  
Yanling Zhao ◽  
Feifei Yang ◽  
Tao Liu ◽  
Wu Xiao ◽  
...  
Keyword(s):  
Heat Stress ◽  
Water Content ◽  
Spontaneous Combustion ◽  
Leaf Water ◽  
Coal Gangue ◽  
Leaf Water Content ◽  
Spectral Features ◽  
Lasso Regression ◽  
Stress Assessment ◽  
First Derivative

Vegetation heat-stress assessment in the reclamation areas of coal gangue dumps is of great significance in controlling spontaneous combustion; through a temperature gradient experiment, we collected leaf spectra and water content data on alfalfa. We then obtained the optimal spectral features of appropriate leaf water content indicators through time series analysis, correlation analysis, and Lasso regression analysis. A spectral feature-based long short-term memory (SF-LSTM) model is proposed to estimate alfalfa’s heat stress level; the live fuel moisture content (LFMC) varies significantly with time and has high regularity. Correlation analysis of the raw spectrum, first-derivative spectrum, spectral reflectance indices, and leaf water content data shows that LFMC and spectral data were the most strongly correlated. Combined with Lasso regression analysis, the optimal spectral features were the first-derivative spectral value at 1661 nm (abbreviated as FDS (1661)), RVI (1525,1771), DVI (1412,740), and NDVI (1447,1803). When the classification strategies were divided into three categories and the time sequence length of the spectral features was set to five consecutive monitoring dates, the SF-LSTM model had the highest accuracy in estimating the heat stress level in alfalfa; the results provide an important theoretical basis and technical support for vegetation heat-stress assessment in coal gangue dump reclamation areas.

scholarly journals Rock-Solubilizing Microbial Inoculums Have Enormous Potential as Ecological Remediation Agents to Promote Plant Growth

Forests ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 357
Author(s):  
Zhaohui Jia ◽  
Miaojing Meng ◽  
Chong Li ◽  
Bo Zhang ◽  
Lu Zhai ◽  
...  
Keyword(s):  
Plant Growth ◽  
Leaf Area ◽  
Ecological Restoration ◽  
Root Nodules ◽  
Robinia Pseudoacacia ◽  
Growth Index ◽  
Nodule Formation ◽  
Bare Rock ◽  
Mining Sites ◽  
Robinia Pseudoacacia L

Anthropogenic overexploitation poses significant threats to the ecosystems that surround mining sites, which also have tremendous negative impacts on human health and society safety. The technological capacity of the ecological restoration of mine sites is imminent, however, it remains a challenge to sustain the green restorative effects of ecological reconstruction. As a promising and environmentally friendly method, the use of microbial technologies to improve existing ecological restoration strategies have shown to be effective. Nonetheless, research into the mechanisms and influences of rock-solubilizing microbial inoculums on plant growth is negligible and the lack of this knowledge inhibits the broader application of this technology. We compared the effects of rock-solubilizing microbial inoculums on two plant species. The results revealed that rock-solubilizing microbial inoculums significantly increased the number of nodules and the total nodule volume of Robinia pseudoacacia L. but not of Lespedeza bicolor Turcz. The reason of the opposite reactions is possibly because the growth of R. pseudoacacia was significantly correlated with nodule formation, whereas L. bicolor’s growth index was more closely related to soil characteristics and if soil nitrogen content was sufficient to support its growth. Further, we found that soil sucrase activity contributed the most to the height of R. pseudoacacia, and the total volume of root nodules contributed most to its ground diameter and leaf area. Differently, we found a high contribution of total soil carbon to seedling height and ground diameter of L. bicolor, and the soil phosphatase activity contributed the most to the L. bicolor’ s leaf area. Our work suggests that the addition of rock-solubilizing microbial inoculums can enhance the supply capacity of soil nutrients and the ability of plants to take up nutrients for the promotion of plant growth. Altogether, our study provides technical support for the practical application of rock-solubilizing microbes on bare rock in the future.

scholarly journals Accumulation of Silicon and Changes in Water Balance under Drought Stress in Brassica napus var. napus L.

Plants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 280
Author(s):  
Diana Saja-Garbarz ◽  
Agnieszka Ostrowska ◽  
Katarzyna Kaczanowska ◽  
Franciszek Janowiak
Keyword(s):  
Abscisic Acid ◽  
Drought Stress ◽  
Stomatal Conductance ◽  
Water Balance ◽  
Water Content ◽  
Oilseed Rape ◽  
Potential Evapotranspiration ◽  
Leaf Water Content ◽  
Optimal Conditions ◽  
Abscisic Acid Level

The aim of this study was to investigate the accumulation of silicon in oilseed rape and to characterize the changes in chosen water balance parameters in response to drought. The following parameters were estimated: water content, osmotic and water potential, evapotranspiration, stomatal conductance and abscisic acid level under optimal and drought conditions. It was shown that oilseed rape plants accumulate silicon after its supplementation to the soil, both in the case of silicon alone and silicon together with iron. It was revealed that silicon (without iron) helps maintain constant water content under optimal conditions. While no silicon influence on osmotic regulation was observed, a transpiration decrease was detected under optimal conditions after silicon application. Under drought, a reduction in stomatal conductance was observed, but it was similar for all plants. The decrease in leaf water content under drought was accompanied by a significant increase in abscisic acid content in leaves of control plants and those treated with silicon together with iron. To sum up, under certain conditions, silicon is accumulated even in non-accumulator species, such as oilseed rape, and presumably improves water uptake under drought stress.

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