scholarly journals Temporal Variations in Soil Enzyme Activities and Responses to Land-Use Change in the Loess Plateau, China

2019 ◽  
Vol 9 (15) ◽  
pp. 3129 ◽  
Author(s):  
Deng ◽  
Chong ◽  
Zhang ◽  
Ren ◽  
Zhao ◽  
...  
Keyword(s):  
Alkaline Phosphatase ◽  
Temporal Variation ◽  
Soil Nutrients ◽  
Loess Plateau ◽  
Enzyme Activities ◽  
Dissolved Organic Nitrogen ◽  
Organic Nitrogen ◽  
Soil Enzyme ◽  
Soil Enzyme Activities ◽  
The Loess Plateau

Variability in soil enzyme activity may have important implications for the knowledge of underground ecosystem functions driven by soil extracellular enzymes. To illustrate the temporal variation in soil enzyme activity after afforestation, we collected soil samples during different vegetative growth periods in three Caragana korshinskii Kom. stands of different ages (20, 30, and 40 years) and in a slope cropland in the Loess Plateau. These samples were used to analyze the catalase, sucrase, urease and alkaline phosphatase activities, the soil water content and the available soil nutrients (i.e., dissolved organic carbon, dissolved organic nitrogen, and available phosphorus). The results illustrated that the soil enzyme activities significantly increased following afforestation and varied with temporal variation. Overall, soil enzyme activities were higher in June and August, particularly, and both alkaline phosphatase and sucrase were more sensitive to temporal variation than the other two enzymes. In addition, redundancy analysis showed that soil enzyme activities were greatly correlated with soil nutrients, especially for dissolved organic carbon and dissolved organic nitrogen. Therefore, the results highlighted the importance of soil enzyme activities to soil nutrients under temporal variation following afforestation in the Loess Plateau, which may have practical significance for forest managers’ fertilization management of plantation in different seasons and different stand ages.

Temporal variation in soil enzyme activities after afforestation in the Loess Plateau, China

Geoderma ◽  
2016 ◽  
Vol 282 ◽  
pp. 103-111 ◽  
Author(s):  
Chengjie Ren ◽  
Di Kang ◽  
Jian ping Wu ◽  
Fazhu Zhao ◽  
Gaihe Yang ◽  
...  
Keyword(s):  
Temporal Variation ◽  
Loess Plateau ◽  
Enzyme Activities ◽  
Soil Enzyme ◽  
Soil Enzyme Activities ◽  
The Loess Plateau

Soil enzyme activities and microbial biomass response to crop types on the terraces of the Loess Plateau, China

2018 ◽  
Vol 18 (5) ◽  
pp. 1971-1980 ◽  
Author(s):  
Li Xiao ◽  
Yimei Huang ◽  
Quanchao Zeng ◽  
Junfeng Zhao ◽  
Junying Zhou
Keyword(s):  
Microbial Biomass ◽  
Loess Plateau ◽  
Enzyme Activities ◽  
Soil Enzyme ◽  
Soil Enzyme Activities ◽  
The Loess Plateau ◽  
Crop Types

Soil enzyme activities of typical plant communities after vegetation restoration on the Loess Plateau, China

2022 ◽  
Vol 170 ◽  
pp. 104292
Author(s):  
Yuxuan Chen ◽  
Tianxing Wei ◽  
Guoliang Sha ◽  
Qingke Zhu ◽  
Zhao Liu ◽  
...  
Keyword(s):  
Loess Plateau ◽  
Plant Communities ◽  
Enzyme Activities ◽  
Soil Enzyme ◽  
Vegetation Restoration ◽  
Soil Enzyme Activities ◽  
The Loess Plateau

scholarly journals Soil carbon fractions and enzyme activities under different vegetation types on the Loess Plateau of China

2016 ◽  
Author(s):  
Haixin Zhang ◽  
Quanchao Zeng ◽  
Shaoshan An ◽  
Yanghong Dong ◽  
Frédéric Darboux
Keyword(s):  
Alkaline Phosphatase ◽  
Organic Carbon ◽  
Loess Plateau ◽  
Enzyme Activities ◽  
Soil Layer ◽  
Shaanxi Province ◽  
The Loess Plateau ◽  
Sucrase Activity ◽  
Carbon Fractions ◽  
Carbon Fraction

Abstract. Vegetation restoration was effective way of protecting soil erosion and water conservation on the Loess Plateau. Carbon fractions and enzyme activities were sensitive parameters for assessment of soil remediation through revegetation. Forest, forest steppe and grassland soils were collected at 0–5 cm and 5–20 cm soil layers in Yanhe watershed, Shaanxi Province. Urease, sucrase, alkaline phosphatase, soil organic carbon (SOC), microbial biomass carbon (MBC), easily oxidized organic carbon (EOC) and dissolved organic carbon (DOC) were measured. The results showed that carbon fraction contents and enzyme activities in the same soil layer followed the order that forest was higher than others. Carbon fraction contents and enzyme activities appeared that the 0–5 cm was higher than 5–20 cm soil layer. In addition, correlation analysis showed that urease activity was related to SOC, MBC, EOC and DOC at 0–5 cm layer; it was correlated with SOC, MBC and EOC at 5–20 cm layer. Sucrase activity had significant positive relationship with SOC, MBC and EOC. Alkaline phosphatase activity was related to EOC and DOC at 0–5 cm layer; it was correlated with MBC and EOC at 5–20 cm layer. The CCA reflected the relationship between sucrase activity and SOC. The contributions from the various forms of carbon fractions and enzyme activities as evaluated by the canonical coefficient of CV were on the order of SOC > DOC > MBC > EOC; sucrase > urease > alkaline phosphatase. Vegetation type was an important factor influencing the variation of soil enzyme activities and carbon fractions on the Loess Plateau.

scholarly journals Effects of Tree Species and Soil Enzyme Activities on Soil Nutrients in Dryland Plantations

Forests ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 1153
Author(s):  
Yage Li ◽  
Chun Han ◽  
Shan Sun ◽  
Changming Zhao
Keyword(s):  
Soil Nutrients ◽  
Tree Species ◽  
Enzyme Activities ◽  
Chemical Properties ◽  
Soil Enzyme ◽  
Pinus Tabulaeformis ◽  
Soil Enzyme Activities ◽  
Caragana Korshinskii ◽  
Nitrogen Phosphorus

Long-term afforestation strongly changes the soil’s physicochemical and biological properties. However, the underlying mechanism of different tree species driving change in soil nutrients is still unclear in the long-term dryland plantations of the Loess Plateau, China. In this study, samples of surface soil (0–20 cm) and woody litter were collected from five plantations (≥50 years) of Caragana korshinskii, Armeniaca sibirica, Populus hopeiensis, Platycladus orientalis, and Pinus tabulaeformis and a natural grassland, and tested for the carbon, nitrogen, phosphorus, and potassium contents, as well as the soil sucrase (SC), urease (UE), and alkaline phosphorus (ALP) activities. We found that soil nutrients, enzyme activities, and the litter’s chemical properties obviously varied among five tree species. C. korshinskii significantly increased the soil’s TC, organic carbon (OC), total nitrogen (TN), available nitrogen (AN), and available potassium (AK) by 28.42%, 56.08%, 57.41%, 107.25%, and 10.29%, respectively, and also increased the soil’s available phosphorus (AP) by 18.56%; while P. orientalis significantly decreased soil TN (38.89%), TP (30.58%), AP (76.39%), TK (8.25%), and AK (8.33%), and also decreased soil OC (18.01%) and AN (1.09%), compared with those in grassland. The C. korshinskii plantation had higher quality litter and soil enzyme activities than the P. orientalis plantation. Moreover, 62.2% of the total variation in soil nutrients was explained by the litter’s chemical properties and soil enzyme activities, and the litter phosphorus (LP) and soil ALP had a more significant and positive impact on soil nutrients. Therefore, tree species, LP, and soil ALP were key factors driving soil nutrient succession in dryland plantations. The significantly positive nitrogen–phosphorus coupling relationship in the “litter–enzyme–soil” system revealed that the improving nitrogen level promoted the phosphorus cycle of the plantation ecosystem. Our results suggest that leguminous tree species are more suitable for dryland afforestation through the regulation of litter quality and soil enzyme activities.

scholarly journals The influence of halophytic compost, farmyard manure and phosphobacteria on soil microflora and enzyme activities

2008 ◽  
Vol 53 (No. 4) ◽  
pp. 186-192 ◽  
Author(s):  
V. Balakrishnan ◽  
K. Venkatesan ◽  
K.C. Ravindran
Keyword(s):  
Alkaline Phosphatase ◽  
Enzyme Activities ◽  
Microbial Population ◽  
Farmyard Manure ◽  
Soil Enzyme ◽  
Soil Microflora ◽  
Soil Enzyme Activities ◽  
Chemical Fertilizers ◽  
Soil Microbial ◽  
Soil Microbial Population

Biocompost has been identified as an alternative to chemical fertilizers that increased soil microbial population and soil enzyme activities in sustainable farming. The objective of this field study was to evaluate the effect of three halophytic composts in combination with farmyard manure and phosphate solubilising bacteria (<i>Bacillus megaterium</i>) on soil microflora and enzyme activities. The results show that among nine treatments given, the application of <i>Suaeda</i> compost in combination with farmyard manure and phosphate solubilising bacteria (T<sub>9</sub>) significantly increased the soil microflora such as bacteria, fungi and actinomycetes and soil enzyme activities such as dehydrogenases, alkaline phosphatase, cellulase and urease in soil cultivated with <i>Arachis hypogaea</i>.

scholarly journals Effects of Tree Species and Soil Enzyme Activities on Soil Nutrients in The Dryland Plantations

2021 ◽  
Author(s):  
Yage Li ◽  
Chun Han ◽  
Shan Sun ◽  
Changming Zhao
Keyword(s):  
Soil Nutrients ◽  
Tree Species ◽  
Enzyme Activities ◽  
Soil Enzyme ◽  
Total Carbon ◽  
Pinus Tabulaeformis ◽  
Soil Enzyme Activities ◽  
Nitrogen And Phosphorus ◽  
High Quality

Abstract Background Long-term afforestation of different tree species strongly changes the soil physicochemical and biological properties. However, how tree species through litter quality and soil enzyme activities affect the succession of soil nutrients is still unclear in the dryland plantations. In this study, samples of surface soil (0–20 cm) and woody litter were collected from 55 years Caragana korshinskii, and 50 years Armeniaca sibirica, Populus hopeiensis, Platycladus orientalis, and Pinus tabulaeformis, and the natural grassland, and tested for the carbon, nitrogen, phosphorus, and potassium contents, as well as the soil sucrase (SC), urease (UE), and alkaline phosphorus (ALP) activities. Results We found that long-term dryland plantations increased soil total carbon (TC) by 1.69%-28.42%, but significantly decreased soil total phosphorus (TP) and total potassium (TK) by 11.87%-30.58% and 4.69%-8.25%. The C. korshinskii significantly increased soil TC, organic carbon (OC), total nitrogen (TN), available nitrogen (AN), available potassium (AK), UE, and ALP by 28.42%, 56.08%, 57.41%, 107.25%, 10.29%, 11.00%, and 107.81%, respectively, and also raised soil available phosphorus (AP) by 18.56%; while the P. orientalis significantly decreased soil TN, TP, AP, TK, AK, and UE by 38.89%, 30.58%, 76.39%, 8.25%, 8.33%, and 18.97%, respectively, and also reduced soil SC and ALP by 3.84% and 25.32%, compared to those in grassland. In addition, the C. korshinskii produced high-quality litter with lower carbon, the highest nitrogen and phosphorus, and higher potassium contents than those of P. orientalis. The litter chemical properties and soil enzyme activities together explained 62.2% of the total variation of soil nutrients, especially the litter phosphorus (LP) and soil ALP. Therefore, the tree species, LP, and soil ALP were key factors driving soil nutrient succession in dryland plantations. And the significantly positive coupling relationship between nitrogen and phosphorus in the "litter-enzyme-soil" system revealed that the improvement of nitrogen level promoted the phosphorus cycle of the ecosystem. Conclusions This study suggests choosing leguminous tree species with high-quality litter to establish plantations in the phosphorus-limited dryland, which will improve soil nutrients and alleviate nutrient limitations by adjusting soil enzyme activities.

Soil microbial parameters and stability of soil aggregate fractions under different grassland communities on the Loess Plateau, China

Biologia ◽  
2009 ◽  
Vol 64 (3) ◽  
Author(s):  
Shao-shan An ◽  
Axel Mentler ◽  
Veronica Acosta-Martínez ◽  
Winfried Blum
Keyword(s):  
Microbial Biomass ◽  
Enzyme Activities ◽  
Aggregate Stability ◽  
Soil Aggregate ◽  
Soil Enzyme ◽  
Soil Enzyme Activities ◽  
The Loess Plateau ◽  
Soil Microbial ◽  
Aggregate Fractions ◽  
Soil Aggregate Fractions

AbstractOver-grazing and large-scale monocultures on the Loess plateau in China have caused serious soil erosion by water and wind. Grassland revegetation has been reported as one of the most effective counter measures. Therefore, we investigated soil aggregation, aggregate stability and soil microbial activities as key parameters for soil remediation through grassland revegetation.The results showed that soil microbial biomass carbon (Cmic) and microbial biomass nitrogen (Nmic) increased under revegetated grass communities compared to cropland and overgrazed pastures and were higher in surface layers (0–10 cm) than in the subsurface (10–20 cm). Although there are variations between the four investigated grassland communities, their values were 10 to 50 times higher in comparison to the cropland and overgrazed pastures, similar to the increase in soil enzyme activities, such as β-glucosidase and β-glucosaminidase.Soil aggregate stability (SAS) showed clear differences between the different land uses with two main soil aggregate fractions measured by ultra sound: < 63 μm and 100–250 μm, with approximately 70% and 10% of the total soil volume respectively. We also found positive correlations between SAS and soil microbial parameters, such as Cmic, Nmic, and soil enzyme activities. From this, we concluded that revegetation of eroded soils by grasses accelerates soil rehabilitation.

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