Fine root extension in urban forest soil depends on organic mulching

Sun, Xiaodan; Zhao, Jiahao; Wang, Gang; Guan, Qingwei; Kuzyakov, Yakov

doi:10.1007/s10457-022-00801-3

Cited by 3 publications

(5 citation statements)

References 58 publications

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“…Reduced soil organic carbon negatively impacts plant growth and productivity (Murphy 2015), which may be another reason for the impact of PCL on E. sativa growth. PP can reduce soil bulk density (de Souza Machado et al 2019), leading to a reduction in specific root length (Sun et al 2023). This is consistent with our experimental findings, which indicate a significant reduction in plant root length from PP microplastics.…”

Section: Discussionsupporting

confidence: 92%

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The effects of microplastics on crop variation depend on polymer types and their interactions with soil nutrient availability and weed competition

Ma,

Fu,

Liu

2024

Plant Biol J

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Microplastics pollution of agricultural soil is a global environmental concern because of its potential risk to food security and human health. Although many studies have tested the direct effects of microplastics on growth of Eruca sativa Mill., little is known about whether these effects are regulated by fertilization and weed competition in field management practices. Here, we performed a greenhouse experiment growing E. sativa as target species in a three‐factorial design with two levels of fertilization (low versus. high), two levels of weed competition treatments (weed competition versus no weed competition) and five levels of microplastic treatments (no microplastics, Polybutylene adipate‐co‐terephthalate [PBAT], Polybutylene succinate [PBS], Polycaprolactone [PCL] or Polypropylene [PP]). Compared to the soil without microplastics, PBS and PCL reduced aboveground biomass and leaf number of the E. sativa. PBS also resulted in increased root allocation and thicker roots in E. sativa. In addition, fertilization significantly mitigated the negative effects of PBS and PCL on aboveground biomass of E. sativa, but weed competition significantly promoted these effects. Although fertilization alleviated the negative effect of PBS on aboveground biomass, such alleviation became weaker under weed competition than when E. sativa grew alone. The results indicate that the effects of specific polymer types on E. sativa growth could be regulated by fertilization, weed management, and even their interactions. Therefore, reasonable on‐farm management practices may help in mitigating the negative effects of microplastics pollution on E. sativa growth in agricultural fields.

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Section: Discussionsupporting

confidence: 92%

“…2019), leading to a reduction in specific root length (Sun et al . 2023). This is consistent with our experimental findings, which indicate a significant reduction in plant root length from PP microplastics.…”

Section: Discussionmentioning

confidence: 99%

The effects of microplastics on crop variation depend on polymer types and their interactions with soil nutrient availability and weed competition

Ma,

Fu,

Liu

2024

Plant Biol J

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“…The higher root cellulose concentrations in the LIT and MIT treatments may be a direct factor hindering fine root decomposition and nutrient release. Additionally, a significant effect of MBC on fine root morphological traits was observed in our study (Figure 3), consistent with other studies [33]. Root morphology is a strong determinant of rhizosphere microbial community composition [78].…”

Section: Soil Factors Affecting Fine Root Morphology and Chemistrysupporting

confidence: 92%

“…Dry weights of fine roots of different orders were obtained by oven-drying the roots at 65 • C for 72 h and weighing after scanning. The aforementioned measurements were used to calculate the following trait data: specific root length (cm g −1 ) = RL/dry weight; specific surface area (cm 2 g −1 ) = RA/root dry weight; and fine root tissue density (g cm −3 ) = dry weight/RV [33]. Root C and N concentrations were determined using an elemental analyzer (Vario Elemental III, Fischer, Waldachtal, Germany).…”

Section: Fine Root Traitsmentioning

confidence: 99%

“…Consequently, from first-to fifth-order fine roots, SRL, SSA, and the concentrations of N and phenolic compounds decrease, while RD, RTD, and concentrations of C, cellulose, lignin, and non-structural carbohydrates increase [24,31,32]. Due to differences in the functions and structure of fine roots in different root sequences, the responses of root morphology and chemistry among branch orders to forest management activities showed various trends [16,33,34]. Clarifying the intraspecific variations in fine root traits in different orders after thinning will ultimately deepen the understanding of belowground ecological processes mediated by fine root dynamics.…”

Section: Introductionmentioning

confidence: 99%

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Responses of Fine Root Morphological and Chemical Traits among Branch Orders to Forest Thinning in Pinus massoniana Plantations

Zhao,

Sun,

Wang

et al. 2024

Forests

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Fine roots play an essential role in biogeochemical cycling in forest ecosystems; however, little is known about the response of fine root morphology and chemistry in different root orders to forest management activities such as forest thinning. We investigated the fine root morphological and chemical traits in different root orders of Pinus massoniana under different thinning intensities, namely no thinning, low-intensity thinning (LIT), middle-intensity thinning (MIT), and high-intensity thinning (HIT) (0%, 25%, 45%, and 65% of individual trees eliminated, respectively). We found that forest thinning increased the root diameter (RD) of absorptive roots and decreased that of transport roots, while the trend for the specific root length (SRL) was the opposite. LIT and MIT could increase specific surface area (SSA), especially the SSA of absorptive roots in the MIT treatment. The root tissue density (RTD) of all root sequences in the LIT treatment decreased but increased in the HIT treatment. For the fine root chemical traits, thinning increased the root carbon concentration (RCC) of absorptive roots. The root nitrogen concentration (RNC) and root phosphorus concentration (RPC) of first- to fourth-order roots increased in the LIT and MIT treatments after thinning. Meanwhile, thinning increased root lignin, cellulose, and non-structural carbohydrate (NSC) concentrations. Soil temperature, nitrate, and microbial biomass carbon were factors affecting variations in fine root morphology and chemistry. Forest thinning was likely to shift the absorptive roots’ foraging strategy into a resource-conserving one. Thinning increased fine root chemical traits in most root orders. These findings contributed to our ability to predict how belowground ecological processes are mediated by fine roots under forest management activities.

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Responses of belowground fine root biomass and morphology in Robinia pseudoacacia L. plantations to aboveground environmental factors

Feng,

Sui,

Tang

et al. 2024

Global Ecology and Conservation

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Fine root extension in urban forest soil depends on organic mulching

Cited by 3 publications

References 58 publications

The effects of microplastics on crop variation depend on polymer types and their interactions with soil nutrient availability and weed competition

The effects of microplastics on crop variation depend on polymer types and their interactions with soil nutrient availability and weed competition

Responses of Fine Root Morphological and Chemical Traits among Branch Orders to Forest Thinning in Pinus massoniana Plantations

Responses of belowground fine root biomass and morphology in Robinia pseudoacacia L. plantations to aboveground environmental factors

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