Water source partitioning and nitrogen facilitation promote coexistence of nitrogen-fixing and neighbor species in mixed plantations in the semiarid Loess Plateau

Tang, Yakun; Wu, Xu; Chen, Chen; Jia, Chang; Chen, Yunming

doi:10.1007/s11104-019-04301-9

Cited by 18 publications

(19 citation statements)

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“…CC BY 4.0 License. Furthermore, mixed afforestation increased the total biomass of H. rhamnoides and P. davidiana that calculated through the allometric equation indicated in Zhou et al (2018) and Tang et al (2019) (Table S5). Thus, rainfall pulse sensitive species in pure plantation, and plant species in mixed plantation that can adopt physiological or morphological adjustment to enhance rainwater uptake and reduce excessive 505 water uptake from deep soil layers, should be more considered for use in the studied region.…”

Section: Implications For Plantation Species and Type Selection Based On Rainwater Uptake And Consumptionmentioning

confidence: 80%

“…CC BY 4.0 License. however, overlapping water sources among plant species may lead to competition in arid and semiarid regions (Tang et al, 2019;Yang et al, 2020). Rainfall pulses have been observed to relieve or eliminate water competition and thus maintain or increase plant water consumption in some water limited regions 70 (Du et al, 2011;Tfwala et al, 2019).…”

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confidence: 99%

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“…through afforestation activities since the 1990s, to deal with vegetation degradation and water and soil loss (Tang et al, 2019;Wu et al, 2021). Hippophae rhamnoides and Populus davidiana are typical dominant tree species, with high survival rate and drought tolerance, and occupy nearly 30% of the plantation area in this region (Liu et al, 2017;Tang et al, 2019). In addition to H. rhamnoides and P. davidiana pure plantations, mixed plantations of these two species were also widely promoted due to 85 the higher soil and water conservation capacity than pure plantations in the original afforestation stage (Tang et al, 2019;Wang et al, 2020).…”

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confidence: 99%

“…Hippophae rhamnoides and Populus davidiana are typical dominant tree species, with high survival rate and drought tolerance, and occupy nearly 30% of the plantation area in this region (Liu et al, 2017;Tang et al, 2019). In addition to H. rhamnoides and P. davidiana pure plantations, mixed plantations of these two species were also widely promoted due to 85 the higher soil and water conservation capacity than pure plantations in the original afforestation stage (Tang et al, 2019;Wang et al, 2020). Rainwater has obvious seasonal variability and is the only replenished soil water source in this region because of the soil is approximately 100 m deep (Li et al, 2016;Zhang et al, 2017).…”

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Differential response of plant water consumption to rainwater uptake for dominant tree species in the semiarid Loess Plateau

Tang

Wang

et al. 2021

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Abstract. Whether uptake of rainwater can increase plant water consumption in response to rainfall pulses requires investigation to evaluate the plant adaptability, especially in water limited regions where rainwater is the only replenishable soil water source. In this study, the water sources from rainwater and three soil layers, predawn (Ψpd), midday (Ψm) and gradient (Ψpd−Ψm) of leaf water potential, and water consumption in response to rainfall pulses were analyzed for two dominant tree species, Hippophae rhamnoides and Populus davidiana, in pure and mixed plantations during the growing period (June–September). In pure plantations, the relative response of daily normalized sap flow (SFR) was significantly affected by rainwater uptake proportion (RUP) and Ψpd−Ψm for H. rhamnoides, and was only significantly influenced by Ψpd−Ψm for P. davidiana (P < 0.05). Meanwhile, the large Ψpd−Ψm was consistent with high SFR for H. rhamnoides, and the small Ψpd−Ψm was consistent with the low SFR for P. davidiana, in response to rainfall pulses. Therefore, H. rhamnoides and P. davidiana exhibited sensitive and insensitive responses to rainfall pulses, respectively. Furthermore, mixed afforestation significantly enhanced RUP, SFR, and reduced the water source proportion from the deep soil layer (100–200 cm) for both species (P < 0.05). The SFR was significantly influenced by RUP and Ψpd−Ψm for both species in the mixed plantation. Lower Ψm and higher Ψpd were adopted by H. rhamnoides and P. davidiana in mixed plantation, respectively, to enlarge Ψpd−Ψm, enhance rainwater uptake, and decrease water source competition from the deep soil layer. These results indicate that mixed afforestation enhanced the influence of rainwater uptake to water consumption after rainfall pulse, regardless of sensitivity to rainfall pulses. This study provides insights into suitable plantation species selection and management considering the link between rainwater uptake and consumption in water limited regions.

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Section: Implications For Plantation Species and Type Selection Based On Rainwater Uptake And Consumptionmentioning

confidence: 80%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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