Soil Quality Evaluation for Cotton Fields in Arid Region Based on Graph Convolution Network

Land, Год журнала: 2023, Номер 12(10), С. 1897 - 1897

Опубликована: Окт. 10, 2023

Accurate soil quality evaluation is an important prerequisite for improving management systems and remediating pollution. However, traditional methods are cumbersome to calculate, suffer from low efficiency accuracy, which often lead large deviations in the results. This study aims provide a new accurate method based on graph convolution network (GCN). In this study, organic matter (SOM), alkaline hydrolysable nitrogen (AN), available potassium (AK), salinity, heavy metals (iron (Fe), copper (Cu), manganese (Mn), zinc (Zn)) were determined evaluated using index (SQI). Then, (GCN) was first introduced construct model, its results compared with those of SQI. Finally, spatial distribution GCN model displayed. The showed that salinity had largest coefficient variation (86%), followed by (67%) nutrients (30.3%). salinization metal pollution at level area, high level. accuracy salinity/heavy metals, nutrients, 0.91, 0.84, 0.90, respectively. Therefore, has feasible be applied evaluation. provides new, simple, highly

Язык: Английский

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The Impact of Groundwater Burial Depth on the Vegetation of the Dariyabui Oasis in the Central Desert

Sustainability, Год журнала: 2023, Номер 16(1), С. 378 - 378

Опубликована: Дек. 31, 2023

Vegetation and groundwater are important components of the ecological environment oases in desert hinterlands their relationship is crucial to ecosystem stability. In this study, Sentinel-2 data for 2016–2022 measured burial depths were analysed Dariyabui Oasis hinterland Taklamakan Desert. The spatial temporal changes vegetation depth from 2019 2022 based on image–element dichotomous model normalised difference index, utilising inverse distance weight interpolation method, cubic curve regression, difference, slope trend analysis, Markov transfer matrix determining response law between two. Finally, threshold value different cover types was clarified. fractional showed a slight increase 2016 2022. northwest southeast oasis increased, whereas decreased mid-north northeast regions; 5.14% total area experienced increased coverage, 3.35% coverage. pattern gradual entrance end oasis, that is, south north. stable, with 4-year average 4.1069 m maximum fluctuation 0.4560 m. interannual level an increasing January–April, while levels decreasing May–July August–October remained constant June–July October–December. negative correlation depth, interval highest low-cover distribution 3–6 m, ultimate 7 medium-cover 3–4 high-cover 2–4 6 ranged 3

Язык: Английский

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Community distribution of rhizosphere and endophytic bacteria of ephemeral plants in desert‐oasis ecotone and analysis of environmental driving factors

Land Degradation and Development, Год журнала: 2022, Номер 34(4), С. 1182 - 1196

Опубликована: Ноя. 8, 2022

Abstract Ephemeral plants are important part of the vegetation maintaining Gurbantünggüt Desert‐oasis ecotone stability. Studying response characteristics root‐associated bacteria ephemeral to soil habitats is great significance for understanding adaptability and In this study, physicochemical analysis 16 S sequencing technology were used analyse diversity, structure, function, driving factors rhizosphere root‐endophytic in aeolian grey desert soil. The results showed differences properties root nutrient content between two habitat soils. Shannon index was higher than that soil, whereas ACE indices endophytic lower those Soil type caused evident changes relative abundance community structure bacteria. PICRUSt function prediction energy metabolism, carbohydrate amino acid replication repair, membrane transport main functional categories closely related factors. water content, electrical conductivity (EC), total phosphorus, potassium, nitrogen/phosphorus ratio key affecting bacterial function. pH, EC, ammonium nitrogen, available carbon/phosphorus ratio, phosphorus. This study revealed functions grown different These findings have future studies on metabolic provide references protection restoration soils ecotone.

Язык: Английский

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Photoprotective Effects of D1 Protein Turnover and the Lutein Cycle on Three Ephemeral Plants under Heat Stress

Phyton, Год журнала: 2023, Номер 92(6), С. 1841 - 1857

Опубликована: Янв. 1, 2023

To clarify the characteristics of photoinhibition and primary defense mechanisms ephemeral plant leaves against photodestruction under high temperature stress, inhibitors technology to determine chlorophyll fluorescence were used explore protective effects D1 protein turnover lutein cycle in stress three plants. The results showed that maximum light conversion efficiency (Fv/Fm) decreased, initial (Fo) increased 35°C ± 1°C heat for 1–4 h or on sunny days summer. Both Fv/Fm Fo could be recovered after 8 darkness afternoon weakening external temperature. Streptomycin sulfate (SM) dithiothreitol (DTT) accelerated decrease photochemical quenching coefficient (qP) plants at temperature, was greater SM than DTT treatment. When prolonged, Y(II) values energy distribution parameters PSII Y(NPQ) Y(NO) gradually all treatment groups had their own highly advanced protect photodamage, which inhibited xanthophyll cycle. This can damage reaction center effect Erodium oxyrrhynchum Senecio subdentatus cycle, while Heliotropium acutiflorum subjected damage.

Язык: Английский

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