Enhancement of nutrient resorption efficiency increases plant production and helps maintain soil nutrients under summer grazing in a semi-arid steppe

Zhang, Tongrui; Li, Frank Y.; Shi, Chunjun; Li, Yanlong; Tang, Shiming; Baoyin, Taogetao

doi:10.1016/j.agee.2020.106840

Cited by 49 publications

(24 citation statements)

References 40 publications

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“…The information of NRE and PRE were helpful to understand nutrient-use strategies and nutrient limitation of plant(Zhang et al 2022a;Zhang et al 2020). KRE (> 65%) were higher in this study than NRE and PRE, as more K was resorbed from senesced leaves to mature leaves than retained in the senesced leaves, further con rming that K was resorbed preferentially during the process of regeneration of senesced and new leaves(Du et al 2016; Sartori et al 2022).…”

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confidence: 51%

Nutrient resorption and stoichiometric characteristics of Wuyi rock tea cultivars

Zhu

Peng

et al. 2022

Preprint

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Nutrient resorption is an important strategy for obtaining nutrition, it determines the ecosystems productivity and nutrient cycling. The Wuyi rock tea cultivars are used as important species for controlling soil erosion in hilly mountainous areas, but the mechanism of nutrient resorption is still unclear. The Wuyi Rock tea (Camellia sinensis) plantations are the main economic crops in Fujian province, China, and also have important ecological functions. The tea plants can absorb and conserve nutrients from the senesced leaves, but foliar nutrient resorptions of Wuyi Rock tea cultivars have not been well quantified. Three Wuyi Rock tea cultivars (e.g., Wuyi Jingui, Wuyi Rougui, and Wuyi Shuixian) were chosen in the Wuyishan National Soil and Water Conservation & Science and Technology Demonstration Park this study. Resorption efficiencies of nitrogen (NRE), phosphorus (PRE), potassium (KRE) and their stoichiometric characteristics were determined. KRE and NRE of the three tea cultivars were significantly higher than PRE, indicating that P was more limited than N and K. With the exception of Wuyi Rougui, the other two cultivars (Wuyi Jingui and Wuyi Shuixian) had strong stability in the leaf N and P contents under the changing soil environments. Leaf nutrient and leaf traits such as leaf thickness and specific leaf area had significant correlations with nutrient resorption efficiencies, indicating that leaf nutrient and traits can be used as indicators for nutrient resorption status. Wuyi Rock tea cultivars have strong adaptability to the environment, and they also have high carbon sequestration ability. Simultaneously, Wuyi Rock tea cultivars can reabsorb nutrients and be introduced into nutrient poor mountainous areas for soil and water conservation.

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confidence: 51%

Nutrient resorption and stoichiometric characteristics of Wuyi rock tea cultivars

Zhu

Peng

et al. 2022

Preprint

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“…In nutrient poor ecosystems, the longer residence time of N and P is conducive to the maintenance of plant tissue nutrients and can create conditions for plant rejuvenation the following year [19]. In the process of senescence, more N and P are resorbed and reused in the leaves of dominant plants in desert grassland, resulting in lower N and P concentrations in senescent leaves [50], hence resorption levels are high.…”

Section: Placing Nutrient Resorption-dependent Nutrient Cycling In Co...mentioning

confidence: 99%

Effects of water gradient change on nutrient resorption in the desert steppe of Northern China

Bai

Wang

et al. 2022

Preprint

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Background: Plant growth is often water limited in drylands, and it has been proposed that alleviation of this resource stress by future increases in reactive precipitation may affect internal plant nutrient cycling, thus influencing grassland ecosystem productivity. Methods: A 4-year field experiment was performed to examine the effects of water reduction and addition on nutrient concentrations in soil and plants. We studied five dominant plants in Stipa breviflora desert steppe in Inner Mongolia, and through a simulated precipitation experiment, measured the changes in plant leaf nitrogen (N) concentration, nitrogen resorption efficiency (NRE) and phosphorus resorption efficiency (PRE) natural precipitation, 50% water reduction, 50%water addition and 100% water addition. The effects of different water treatments on nutrient resorption efficiency and its influencing factors were analyzed. Results: Compared with natural precipitation, 100% water addition significantly increased soil moisture and significantly decreased soil available nitrogen. The aboveground biomass of the grassland ecosystem was significantly increased, and the nitrogen and phosphorus concentrations in green and senescent leaves were reduced, thus reducing NRE and PRE. NRE was significantly negatively correlated with N concentration in senescent leaves, and PRE was significantly negatively correlated with phosphorus concentration in senescent leaves. Conclusions: Water addition dilutes the nutrient concentration of plant leaves by increasing aboveground biomass, resulting in the reduction of plant nutrient resorption efficiency. Dominant plants are resistant to nutrient poor habitats in the desert steppe of northern China.

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“…Grazing and mowing are two of the most critical land-use types in grasslands [ 11 , 14 ]. They could alter plant nutrient content and stoichiometry [ 15 ], and soil properties, including soil micro-communities and their activities [ 8 ], thus affecting litter decomposition [ 16 , 17 ]. Mowing reduces the aboveground plant inputs to soil [ 18 , 19 ], while grazing presents more complex effects on grasslands [ 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Mowing Facilitated Shoot and Root Litter Decomposition Compared with Grazing

Zhang

Wei

Liu

et al. 2022

Plants

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Shoot and root litter are two major sources of soil organic carbon, and their decomposition is a crucial nutrient cycling process in the ecosystem. Altitude and land use could affect litter decomposition by changing the environment in mountain grassland ecosystems. However, few studies have investigated the effects of land use on litter decomposition in different altitudes. We examined how land-use type (mowing vs. grazing) affected shoot and root litter decomposition of a dominant grass (Bromus inermis) in mountain grasslands with two different altitudes in northwest China. Litterbags with 6 g of shoot or root were fixed in the plots to decompose for one year. The mass loss rate of the litter, and the environmental attributes related to decomposition, were measured. Litter decomposed faster in mowing than grazing plots, resulting from the higher plant cover and soil moisture but lower bulk density, which might promote soil microbial activities. Increased altitude promoted litter decomposition, and was positively correlated with soil moisture, soil organic carbon (SOC), and β-xylosidase activity. Our results highlight the diverse influences of land-use type on litter decomposition in different altitudes. The positive effects of mowing on shoot decomposition were stronger in lower than higher altitude compared to grazing due to the stronger responses of the plant (e.g., litter and aboveground biomass) and soil (e.g., soil moisture, soil bulk density, and SOC). Soil nutrients (e.g., SOC and soil total nitrogen) seemed to play essential roles in root decomposition, which was increased in mowing plots at lower altitude and vice versa at higher altitude. Therefore, grazing significantly decreased root mass loss at higher altitude, but slightly increased at lower altitude compared to mowing. Our results indicated that the land use might variously regulate the innate differences of the plant and edaphic conditions along an altitude gradient, exerting complex impacts in litter decomposition and further influencing carbon and nutrient cycling in mountain grasslands.

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Enhancement of nutrient resorption efficiency increases plant production and helps maintain soil nutrients under summer grazing in a semi-arid steppe

Cited by 49 publications

References 40 publications

Nutrient resorption and stoichiometric characteristics of Wuyi rock tea cultivars

Nutrient resorption and stoichiometric characteristics of Wuyi rock tea cultivars

Effects of water gradient change on nutrient resorption in the desert steppe of Northern China

Mowing Facilitated Shoot and Root Litter Decomposition Compared with Grazing

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