Long-Term Cropping Effects on Agricultural Sustainability in Alar Oasis of Xinjiang, China

Gong, Li; He, Guixiang; Liu, Weiguo

doi:10.3390/su8010061

Cited by 21 publications

(15 citation statements)

References 29 publications

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“…Even though monocultural cropping can bring higher economic benefits for local farmers, it has been reported that long‐term monocultural cropping practice decreases soil quality and soil microbial diversity that jeopardizes the sustainability of long‐term land use. Long‐term management practices in the crop land such as excessive irrigation, fertilization, and monoculture farming patterns bring secondary problems, such as nutrients loss, destroying soil structure, and inducing secondary salinization (Gong, He, & Liu, 2016; Wei & Yu, 2018). Hence, rotation or intercropping systems that support higher plant diversity should be considered for the sustainability of the desert‐oasis ecotone.…”

Section: Discussionmentioning

confidence: 99%

Reclamation of desert land to different land‐use types changes soil bacterial community composition in a desert‐oasis ecotone

Pokharel

Chen

2020

Land Degrad Dev

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Understanding the impacts of different land‐uses on soil microbial communities is essential for maintaining soil health and sustainability in a desert‐oasis ecotone. Information on the microbial community composition of reclaimed soils under different land‐use types after several decades of reclamation are limited. The objective of this study was to investigate the impacts of reclamation of the non‐productive desert to productive lands on soil microbial community composition and identify the critical soil chemical factors associated with these changes. Soil samples were collected from a control (natural desert land [DL]) and reclaimed lands: cotton land (CL), grape land (vinyards) (GL), and shelterbelt (SL). Soil microbial community composition and diversity were determined by high throughput sequencing. The results showed that soil organic carbon (SOC), total nitrogen (N), phosphorus (P), potassium (K), and pH were significantly different between DL and reclaimed soils (CL, GL, and SL). Sixty years after reclamation, the CL contained a higher relative abundance of Actinobacteria, while the GL and SL contained a higher relative abundance of Acidobacteria. There were 541 operational taxonomic units (OTUs) shared by all the four land‐use types. The highest number of shared OTUs was found in the GL and SL. The variance observed in the bacterial communities in all land‐use types were mainly explained by SOC, followed by total N, total K, pH, and total P. Our results suggest that land‐use type change has significant impacts on soil bacterial community composition and diversity through modifications in soil chemical properties in desert‐oasis ecotone.

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Section: Discussionmentioning

confidence: 99%

Reclamation of desert land to different land‐use types changes soil bacterial community composition in a desert‐oasis ecotone

Pokharel

Chen

2020

Land Degrad Dev

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“…In addition to altering soil nutrient status, the effect of continuous cropping may influence soil enzyme activities [10]. Soil enzyme activity is directly or indirectly affected by agricultural practices such as tillage and fertilization, including continuous cropping [17,18]. Soil enzymes are important components of soil as they are related to changes in nutrient status.…”

Section: Introductionmentioning

confidence: 99%

Imbalanced Soil Chemical Properties and Mineral Nutrition in Relation to Growth and Yield Decline of Sesame on Different Continuously Cropped Upland Fields Converted Paddy

et al. 2019

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Sesame (Sesamum indicum L.) is an important oilseed crop, but is negatively affected by continuous cropping. There is still a lack of information on the effect of continuous cropping on soil chemical properties and mineral nutrition related to sesame growth and yield decline. Therefore, we investigated sesame growth and yield, nutrient concentration and soil chemical properties on five fields with continuous cropping history: non-continuous cropping (Year 0) and durations of two, four, five and six years on an upland field converted paddy in Tottori, Japan. Results show that plant height significantly decreased by 18.76%, 15.22%, and 13.64% in the Year 4, Year 5 and Year 6 fields, respectively, compared to Year 0. The effect of continuous cropping was more pronounced on the 1000-seed weight decline than seed yield. Compared to Year 0, seed yield decreased by 52.86% in Year 2 with no significant differences among the Year 2, Year 4, Year 5 and Year 6 fields, whereas the 1000-seed weight decreased by 6.68% and 12.20% in the Year 2 and Year 5 fields, respectively, compared to Year 0. Plant leaf tissue N concentration significantly decreased in the Year 2, Year 4 and Year 6 fields compared to Year 0, whereas leaf tissue K concentration decreased in the Year 6 field. The increase in duration of continuous cropping years gradually altered soil chemical properties. Soil pH, exchangeable Ca and Mg and cation exchange capacity (CEC) gradually increased in the long duration of continuous cropping, whereas total N and C, exchangeable NH4+-N, urease, dehydrogenase and catalase activities decreased. Our study suggested that the decrease in soil available N and enzyme activities, and decrease in K nutrition due to competitive ion effect as a result of increase in soil Ca and Mg could possibly contribute to the growth and yield decline of continuous sesame on upland field converted paddy.

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“…Data were collected in the northern region of the Taklimakan Desert in Xinjiang, China (80°10’-84°36’E, 0°25’-41°10’N). The mean annual temperature of the area is approximately 10.4 °C, and the mean annual precipitation and evapotranspiration are roughly 50.4 mm, and 1800 mm, respectively (Gong L et al . 2016)The dominant plant species in this desert community are Populus euphratica, Halostachys caspica, Tamarix chinensis, Phragmites communis, Lycium ruthenicum, and Glycyrrhiza uralensis .…”

Section: Methodsmentioning

confidence: 99%

“…2015). Plant communities in the upper reaches of the Tarim Desert are an especially fragile ecological zone (Gong Lu et al . 2016), but have been understudied.…”

Section: Introductionmentioning

confidence: 99%

Relationship between ecological stoichiometry and community diversity of plant ecosystems in the upper reaches of the Tarim River, China

Zhao

Gong

Chen

2018

Preprint

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Relationship between ecological stoichiometry and community diversity of plant3 ecosystems in the upper reaches of the Tarim Abstract 33 Aim Although it is commonly proposed that nutrient cycling can impact plant 34 community diversity, this relationship has not been fully examined in arid and 35 semi-arid zones. Here, we expand on the framework for evaluating the relationship 36 between biodiversity and ecological stoichiometry by scaling up from the level of the 37 community. 38 Location The upper reaches of the Tarim River (Northwest China, 80°10′-84°36′E, 39 0°25′-41°10′N).40Methods We used multivariate analysis of variance to compare the stoichiometric 41 characteristics and species diversity indices of sampled plant communities. We also 42 measured carbon (C), nitrogen (N), and phosphorous (P) content of plants. We then 43 assessed correlations between community stoichiometry and species diversity through 44 structural equation models (SEM) and redundancy analysis (RDA). 45 ResultsWe found that the differences between stoichiometric characteristics and 46 community diversity indices were highly significant. The Margalef index was 3 47 strongly related to C and P content. The Simpson's index and Shannon-Weaner index 48 were most strongly correlated with C content. Pielou's index was closely related to C 49 and N contents, and the C:N and C:P ratios were important at driving ecological 50 dominance. 51Main Conclusions Our study highlights the importance of ecological stoichiometry in 52 driving community assembly and diversity within a desert ecosystems in northwestern 53 China. The relationship between eclogical stoichiometry in the desert plant 54 community had an effect on species diversity, and it was a good indicator of plant 55 community diversity. 56 KEYWORDS 57 community stoichiometry, diversity, structural equation model, redundancy analysis.58 59 INTRODUCTION 60 Ecological stoichiometry is an important tool for studying ecological processes 61 and ecological functions(Zechmeister-Boltenstern S et al. 2016; Shang B et al. 2018), 62 which is mainly used to explore the dynamic balance of various elements and their 63 interactions (Sterner&Elser 2002; Moorthi S D et al. 2016). The C, N, and P 64 concentrations are vital source elements in plants, and their changes in characteristics 65 limit plant growth(Zeng Q et al. 2016; Sperfeld E et al. 2017 ). It can be used to judge 66 the nutrient limitation of plants and to reveal the utilization strategies of plants for 67 nutrients (Sterner&Elser 2002). At present, stoichiometry has been applied as a new 68 ecological research tool to all levels, such as molecules, cells, individuals, 69 communities and ecosystems (Elser J J et al. 2007; Elser J J et al. 2010; Yan Z B et 70 al. 2016). With the changes of the global environment,terrestrial ecosystems have also 71 undergone significant changes in the aspects of structure, process, function and 72 vegetation distribution pattern (Freudenberger L et al. 2012). Among them, the role of 73 community ecological st...

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Long-Term Cropping Effects on Agricultural Sustainability in Alar Oasis of Xinjiang, China

Cited by 21 publications

References 29 publications

Reclamation of desert land to different land‐use types changes soil bacterial community composition in a desert‐oasis ecotone

Reclamation of desert land to different land‐use types changes soil bacterial community composition in a desert‐oasis ecotone

Imbalanced Soil Chemical Properties and Mineral Nutrition in Relation to Growth and Yield Decline of Sesame on Different Continuously Cropped Upland Fields Converted Paddy

Relationship between ecological stoichiometry and community diversity of plant ecosystems in the upper reaches of the Tarim River, China

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