Temporal and spatial variation of surface soil water content on karst slopes in dry season

Chuan, 张川 Zhang; Wei, 张伟 Zhang; Chen, H.; Yunpeng, 聂云鹏 Nie; Yingying, 叶莹莹 Ye; Kelin, 王克林 Wang

doi:10.5846/stxb201402280349

Cited by 2 publications

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“…In addition, the total nutrients and pH of the soil are the leading ecological factors affecting the soil microbial community structure; during the eucalyptus afforestation programs, measures such as applying organic and microbial fertilizers and increasing plant diversity should be taken to relieve the soil productivity recession by regulating the soil microbial community structure and metabolic activity [60]. The results obtained by the Biolog EcoPlate method only represent a part of the entire microbial community to some extent, as microbes that do not utilize the carbon sources in the plates and those that were at a dormant state could not be manifested in the microbial community functional diversity; thus, the entire information of the microbial community structure could not be directly and completely obtained [39]. To intensively investigate the soil microbial community functional diversity, techniques such as soil metagenomics and phospholipid fatty acid analysis should be used in combination.…”

Section: Discussionmentioning

confidence: 99%

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Functional Diversity of the Soil Culturable Microbial Community in Eucalyptus Plantations of Different Ages in Guangxi, South China

Lan

Peng

et al. 2019

Forests

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We selected five different ages of eucalyptus plantation sites to understand the culturable microbial functional diversity and the ecological functions of the soil from the eucalyptus plantations in Guangxi. We investigated the carbon source metabolic activity and diversity features of surface soil microbes using the Biolog EcoPlate method (Biolog Inc., Hayward, CA, USA), along with the microbial functional diversity and physicochemical properties of the soil. The results suggest that the carbon source utilization capacity of the soil microbes at various forest ages manifested as 3-year-old > 5-year-old > 2-year-old > 1-year-old > 8-year-old. The abundance, Shannon–Weiner, Pielou, Simpson, and McIntosh diversity indices of the soil microbes initially increased and then decreased with further increase in forest age, with the highest levels in 3- and 5-year-old forests. As per the heatmap analysis, the 3-year-old forest could metabolize the most carbon source species, while the 1- and 8-year-old forests could metabolize the least. Carbohydrates were the most frequently metabolized carbon source. The principal component analysis (PCA) shows that PC1 and PC2 extracted from the 31 factors have 52.42% and 13.39% of the variable variance, respectively. Carbohydrates contributed most to PCA, followed by amino acids and carboxylic acids, and phenolic acids and amines, the least. Canonical correspondence analysis shows that total carbon, alkali-hydrolyzable nitrogen, total nitrogen, total potassium, and pH negatively correlate with soil microbial functional diversity, whereas total and available phosphorus positively correlate with it. To sum up, the soil microbial community structure of eucalyptus plantations at various ages reflects the soil environmental conditions and nutrient availability, which is of great significance in the efficient management and high-quality operation of their plantations in Guangxi.

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Section: Discussionmentioning

confidence: 99%

“…The soil here has five subtypes (red, yellow, yellow-red, brown calcareous, and black calcareous). For our study we used latosolic red soil developed from sand shales [37][38][39].…”

Section: Profile Of the Study Sitementioning

confidence: 99%

Functional Diversity of the Soil Culturable Microbial Community in Eucalyptus Plantations of Different Ages in Guangxi, South China

Lan

Peng

et al. 2019

Forests

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“…Due to the importance of soil moisture in karst areas, the spatial heterogeneity of soil moisture under different vegetation types [18], land use types [7,19], climatic conditions [20,21], and other environmental conditions has received much attention [22][23][24]. For instance, Zhang et al [25] believe that the water holding capacity of soil water in shrub land is stronger than that of grass land on karst hillslopes and that the temporal variation trend of soil water is the same as rainfall. Wang et al [26] examined the temporal stability of surface soil moisture content on two karst hillslopes in southwest China, finding that the shrub land was wetter than the mixed grass-shrub land.…”

Section: Introductionmentioning

confidence: 99%

Spatio-Temporal Heterogeneity of Soil Moisture on Shrub–Grass Hillslope in Karst Region

Jun-cai

Meng

et al. 2023

Water

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Influenced by the topography, the spatial variation of soil thickness on karst slopes is very large, and accordingly the spatial variation of soil moisture is also large. Therefore, analyzing the spatial heterogeneity of soil moisture on hillslopes is important for maintaining ecosystem stability. Combining geostatistical methods and GIS technology, the spatial variability and distribution pattern of soil moisture and the influencing factors of spatial variation and surface soil moisture (0–7 cm) on a typical karst shrub–grass hillslope were analyzed. The results showed that the mean soil moisture and coefficient of variation (CV) ranged between 25.7–42.6% and 10.3–20.9%, respectively, showing a moderate variation. The soil moisture presented a moderate or strong spatial autocorrelation in the sampling scale. The occurrence of rainfall events can exert a great influence on reducing the spatial heterogeneity of soil moisture. The spatial distribution pattern of soil moisture showed roughly plaque or stripe distribution. When soil moisture was much lower, the patch space fragmentation of soil moisture was higher. The soil moisture was higher in the low and middle parts of the plot. We can conclude that factors such as topography, vegetation, and weather conditions will exert a significant effect on soil moisture spatial variability. Areas with lower slope and higher vegetation coverage were more conducive to the retention of soil moisture.

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Temporal and spatial variation of surface soil water content on karst slopes in dry season

Cited by 2 publications

References 0 publications

Functional Diversity of the Soil Culturable Microbial Community in Eucalyptus Plantations of Different Ages in Guangxi, South China

Functional Diversity of the Soil Culturable Microbial Community in Eucalyptus Plantations of Different Ages in Guangxi, South China

Spatio-Temporal Heterogeneity of Soil Moisture on Shrub–Grass Hillslope in Karst Region

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