Response of soil physicochemical properties and enzyme activities to long-term reclamation of coastal saline soil, Eastern China

2017 ◽  
Vol 607-608 ◽  
pp. 1419-1427 ◽  
Author(s):  
Xuefeng Xie ◽  
Lijie Pu ◽  
Qiqi Wang ◽  
Ming Zhu ◽  
Yan Xu ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Enzyme Activities ◽  
Saline Soil ◽  
Eastern China ◽  
Soil Physicochemical Properties ◽  
Coastal Saline Soil

Effect of long-term reclamation on soil quality in agricultural reclaimed coastal saline soil, Eastern China

2020 ◽  
Vol 20 (11) ◽  
pp. 3909-3920
Author(s):  
Xuefeng Xie ◽  
Lijie Pu ◽  
Ming Zhu ◽  
Tao Wu ◽  
Yan Xu ◽  
...  
Keyword(s):  
Soil Quality ◽  
Saline Soil ◽  
Eastern China ◽  
Coastal Saline Soil

scholarly journals Sewage Sludge Amendment Combined with Green Manuring to a Coastal Mudflat Salt-Soil in Eastern China: Effects on Soil Physicochemical Properties and Maize Yield

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Yanchao Bai ◽  
Wengang Zuo ◽  
Yiyun Yan ◽  
Chuanhui Gu ◽  
Yongxiang Guan ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Physicochemical Properties ◽  
Eastern China ◽  
Arable Land ◽  
Soil Layer ◽  
Aggregate Stability ◽  
Maize Yield ◽  
Soil Physicochemical Properties ◽  
Green Manuring ◽  
Salt Soil

Sewage sludge and green manure have become widely used organic amendments to croplands in many regions of the world. However, the amending effect of the combination of sewage sludge with green manuring in reclaimed coastal mudflat salt-soil has been unclear yet. This paper was one of earlier studies to investigate and evaluate the effects of sewage sludge amendment combined with green manuring on selected soil physicochemical properties of the mudflat soil in a rain-fed agroecosystem. The mudflat salt-soil was amended by one-time input of sewage sludge at the rates of 0, 30, 75, 150, and 300 t ha−1. After green manuring for three consecutive seasons, maize (Zea maysL.) was planted in 2013 and 2014. The results showed that SSA combined with green manuring decreased bulk density, pH, salinity, and exchangeable sodium percentage of the topsoil (0–20 cm soil layer) and increased aggregate stability, cation exchange capacity, and N and P concentration of the topsoil. As a result, the maize yield increased with the increase of SSA rates. Sewage sludge combined with green manuring can be applied in coastal mudflat salt-soil amendment, which provides an innovative way to create arable land resources and safe disposal of sewage sludge.

scholarly journals Changes in soil physicochemical properties and bacterial communities at different soil depths after long-term straw mulching under a no-till system

SOIL ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 595-609
Author(s):  
Zijun Zhou ◽  
Zengqiang Li ◽  
Kun Chen ◽  
Zhaoming Chen ◽  
Xiangzhong Zeng ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Bacterial Communities ◽  
Bacterial Abundance ◽  
Soil Physicochemical Properties ◽  
Organic C ◽  
Straw Mulching ◽  
Soil Bacterial Communities ◽  
No Till ◽  
Relative Abundances

Abstract. Conservation tillage has attracted increasing attention over recent decades, mainly due to its benefits for improving soil organic matter content and reducing soil erosion. However, the effects of long-term straw mulching under a no-till system on soil physicochemical properties and bacterial communities at different soil depths are still unclear. In this 12-year experiment of straw removal (CK) and straw mulching (SM) treatments, soil samples were collected at 0–5, 5–10, 10–20, and 20–30 cm soil depths. The results showed that the contents of organic carbon (C), nitrogen (N), and phosphorus (P) fractions, and bacterial abundance significantly decreased, whereas pH significantly increased with soil depth. Compared with CK, SM significantly increased total N, inorganic N, available P, available potassium, and soil water content at 0–5 cm, total organic C content at 0–10 cm, and dissolved organic C and N contents at 0–20 cm. Regarding bacterial communities, SM increased the relative abundances of Proteobacteria, Bacteroidetes, and Acidobacteria but reduced those of Actinobacteria, Chloroflexi, and Cyanobacteria. Bacterial Shannon diversity and Shannon's evenness at 0–5 cm were reduced by SM treatment compared to CK treatment. Furthermore, SM increased the relative abundances of some C-cycling genera (such as Terracidiphilus and Acidibacter) and N-cycling genera (such as Rhodanobacter, Rhizomicrobium, Dokdonella, Reyranella, and Luteimonas) at 0–5 cm. Principal coordinate analysis showed that the largest difference in the composition of soil bacterial communities between CK and SM occurred at 0–5 cm. Soil pH and N and organic C fractions were the major drivers shaping soil bacterial communities. Overall, SM treatment is highly recommended under a no-till system because of its benefits to soil fertility and bacterial abundance.

scholarly journals Manure substitution of chemical fertilizer affect soil microbial community diversity, structure and function in greenhouse vegetable production systems

2019 ◽  
Author(s):  
Haoan Luan ◽  
Wei Gao ◽  
Shaowen Huang ◽  
Jiwei Tang ◽  
Mingyue Li ◽  
...  
Keyword(s):  
Microbial Community ◽  
Physicochemical Properties ◽  
Soil Microbial Community ◽  
Enzyme Activities ◽  
Substitution Rate ◽  
Soil Microbial Communities ◽  
Chemical Fertilizer ◽  
Soil Physicochemical Properties ◽  
Soil Microbial ◽  
Microbial Characteristics

ABSTRACTSoil microbial community and enzyme activities together affect various ecosystem functions of soils. Fertilization, as important agricultural management practices, are known to modify soil microbial characteristics; however, inconsistent results have been reported. The aim of this research therefore was to make a comparative study of the effects of different fertilization patterns (No N inputs (No N), 100% chemical fertilizer-N (CN) inputs (4/4CN) and different substitution rates of CN by organic manure-N (MN) (3/4CN+1/4MN, 2/4CN+2/4MN and 1/4CN+3/4MN)) on soil physicochemical properties, enzyme activities and microbial attributes in a GVP of Tianjin, China. Manure substitution of chemical fertilizer, especially at higher substitution rate (2/4CN+2/4MN and 1/4CN+3/4MN), improved soil physicochemical properties (higher soil organic C (SOC) and nutrient contents; lower bulk densities), promoted microbial growth (higher total phospholipid fatty acids and microbial biomass C contents) and activity (higher soil hydrolase activities). Manure addition caused a remarkable increase of the fungi/bacteria ratio and a distinct shift in the fungal (bacterial) community to greater abundance of arbuscular mycorrhizal fungi (G+ bacteria) compared with saprotrophic fungi (G− bacteria). These changes drove shifts toward fungal-dominated soil microbial communities and then optimized microbial community structure. Also, manure application increased soil biodiversity (microbial community and enzyme function), indicated by increased Shannon–Wiener diversity. Redundancy analysis indicated that the most possible mechanism of the impacts of different fertilization patterns on soil microbial characteristics may be the mediation of SOC and nutrient (N) availability (especially SOC) in this GVP of China. In conclusion, manure substitution of chemical fertilizer, especially at higher substitution rate, was more efficient for improving soil quality and biological functions.

Long-term cotton stubble return and subsoiling increases cotton yield through improving root growth and properties of coastal saline soil

2022 ◽  
Vol 177 ◽  
pp. 114472
Author(s):  
Le Zhang ◽  
Lili Mao ◽  
Xiaoyu Yan ◽  
Chengmin Liu ◽  
Xianliang Song ◽  
...  
Keyword(s):  
Root Growth ◽  
Saline Soil ◽  
Cotton Yield ◽  
Coastal Saline Soil

scholarly journals Understory Vegetation Dynamics across a Poplar Plantation Chronosequence in Reclaimed Coastal Saline Soil

Forests ◽  
2019 ◽  
Vol 10 (9) ◽  
pp. 764 ◽  
Author(s):  
Daya Ram Poudel ◽  
Han Y. H. Chen ◽  
Mohan KC ◽  
Zhiwei Ge ◽  
Horacio E. Bown ◽  
...  
Keyword(s):  
Saline Soil ◽  
Eastern China ◽  
Understory Vegetation ◽  
Equation Modeling ◽  
Stand Age ◽  
Stand Development ◽  
Middle Aged ◽  
Fast Growing ◽  
Soil Variables ◽  
Coastal Saline Soil

Although the understory vegetation abundance, diversity, and composition associated with stand development in natural forests have been well reported, only a few studies have examined the age-related changes of understory vegetation in fast-growing planted forests in reclaimed soils. This study measured the understory vegetation and soil variables in 8-, 12-, and 18-year-old poplar plantations in reclaimed coastal saline soil of Eastern China. This study examined how the abundance, diversity, and composition changed with stand development and the soil variables. Further, structural equation modeling (SEM) was used to evaluate the direct and indirect factors influencing the abundance and plant diversity throughout stand development. Herb abundance was significantly higher in the youngest and oldest stands, whereas shrub abundance was higher in the middle-aged stands. Shannon’s diversity index was significantly higher in the youngest stand for herbs, whereas it was highest in the middle-aged stands for shrubs. A multivariate analysis revealed that the herb and shrub composition were influenced by the stand age, total soil carbon and soil pH. The most parsimonious SEM model showed the negative direct effects of the stand age and the negative indirect effects of the stand age via the soil variables on shrub abundance, shrub diversity, and herb diversity, suggesting that the increase of overstory biomass with the stand age reduces resources available for the understory. Our results revealed that understory diversity and composition might change with stand development mediated by the changes in understory light and soil resources in fast-growing plantations.

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