Water use strategy of <i>Platycladus orientalis</i> in Beijing mountainous area

Ziqiang, 刘自强 Liu; Xinxiao, 余新晓 Yu; Yuanhai, 娄源海 Lou; Hanzhi, 李瀚之 Li; Guodong, 贾国栋 Jia; Weiwei, 路伟伟 Lu

doi:10.5846/stxb201605261017

Cited by 2 publications

(3 citation statements)

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“…Additionally, in water-stressed areas such as Beijing, trees growing on sunny slopes are more susceptible to water stress than those growing on shady slopes [45,65,69]. Furthermore, the soil layer in S2 is deeper, and more water can be absorbed by the tree root [70,71], and S2 has better tree growth condition than S1 (Figure 1). RHD showed no difference between site conditions (Figure 1), consistent with previous research [72].…”

Section: Effect Of Site Condition and Density On Tree And Crown Growthmentioning

confidence: 99%

Tree Crown Affects Biomass Allocation and Its Response to Site Conditions and the Density of Platycladus orientalis Linnaeus Plantation

He,

Zhang,

Wang

et al. 2023

Forests

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Tree crown plays a crucial role in the process of photosynthesis and the formation of biomass. The site conditions and stand density have a significant impact on tree and crown growth, as well as biomass formation. Understanding crown growth and its influence on the allometric growth of the biomass of various organs under diverse site conditions and densities is critical to comprehending forest adaptation to climate change and management. This study examined the growth of trees, crown, and biomass in 36 plots of young Platycladus orientalis plantations across three site conditions (S1: thin soil on the sunny slope; S2: thick soil on the sunny slope; S3: thin soil on the shady slope) and four densities (D1: ≤1500 plants/hm2; D2: 1501–2000 plants/hm2; D3: 2001–3000 plants/hm2; and D4: ≥3001 plants/hm2). The findings of this study showed that S3 demonstrated the best tree growth, with considerably higher DBH and V than S1 and S2. In addition, as the number of trees grew, the average diameter at breast height (DBH), height (H), and volume (V) all decreased greatly. Poor site (S1) suppressed the canopy, decreasing crown width (CW), crown length (CL), crown ratio (CR), crown surface area (CCSA), and crown volume (CCV), while increasing crown efficiency (CEFF). This same trend was seen in D4, where CR, CCSA, and CCV were all much smaller than the other densities, but CEFF was the highest. Subjective and objective indicators were less responsive to changes in crown growth than crown composite indicators like CCSA, CCV, CEFF, and CR. Site condition and density had a major impact on biomass accumulation, with S1 and D4 having a much lower biomass than S2, S3, D1, D2, and D3. More biomass was allocated to the stem in S3 and D1, and more biomass was allocated to branches and leaves in S2, S3, D1, D2, and D3, resulting in a nearly isotropic growth of branches and leaves. The effect of crown indicators on the biomass of each organ varied according to site condition and density. In varied site conditions, crown and DBH ratio (RCD) contributed the most to stem biomass, whereas CL contributed the most to branch and root biomass. CL had the largest effect on biomass accumulation at various densities. This study demonstrates how site condition and density affect tree and crown development and biomass accumulation, providing theoretical guidance for plantation management under climate change.

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Section: Effect Of Site Condition and Density On Tree And Crown Growthmentioning

confidence: 99%

Tree Crown Affects Biomass Allocation and Its Response to Site Conditions and the Density of Platycladus orientalis Linnaeus Plantation

He,

Zhang,

Wang

et al. 2023

Forests

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“…Soil moisture is an important parameter in the water cycle of terrestrial ecosystems [1][2][3] that determines soil evolution and land productivity and is also an important influence on soil erosion processes, plant growth, and vegetation recovery [4]. In the groundwater-soilvegetation-atmosphere continuum (GSPAC) water cycle of forest ecosystems, soil water movement is a key link between water transformation processes at all levels [5,6] and is a key factor affecting forest water retention [4] and soil [7] and vegetation recovery [8].…”

Section: Introductionmentioning

confidence: 99%

“…Soil moisture is closely related to precipitation processes, and precipitation is an important factor that directly affects soil moisture distribution [9] and vegetation water use patterns [8]; the impact of precipitation on ecosystems is also mainly realized through changes in soil moisture, which regulates the structure and function of ecosystems. Soil moisture changes further regulate ecosystem structure and function [6].…”

Section: Introductionmentioning

confidence: 99%

Response of Soil Moisture to Long-Duration Rainstorms in Three Forest Stands in Mountainous Areas of North China

2022

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Rainfall is one of the core components of the water cycle in terrestrial ecosystems and is closely related to hydrothermal balance, plant and animal growth, and stability of the whole ecosystem. Long-duration rainstorms can alter the soil structure of forest ecosystems and affect the spatial distribution of soil moisture, thus affecting the water supply from the soil to trees and being one of the factors that increase the vulnerability of forest ecosystems. In recent years, changes in rainfall patterns have normalized prolonged heavy rainfall in the mountainous areas of North China. However, there are few reports on the response of soil water at different depths to historically long rainstorms in forested areas. By quantifying the relationship between precipitation characteristics and soil water, the soil water transport patterns of Platycladus orientalis (PO), Quercus variabilis (QV) and Pinus tabuliformis (PT) during the long-duration rainstorms of 21–22 July 2012 were evaluated separately, and the roles of different plants in response to the historically long rainstorm were determined. The results showed that (1) the response of different forest stands to rainfall had a lag. Among them, the soil water of PO and PT were less affected by rainfall and could maintain a relatively stable state. (2) The soil moisture transport trend of PO was significantly greater than that of other vegetation zones and covered the whole process of rainfall. Under the three typical vegetation covers, there was a continuous zero-flux plane in the soil at each observed depth (the direction of soil moisture flow is more stable over the rainfall period), but there was no regular transport trend. (3) The root system was an important factor, influencing the differences in soil moisture response of the three vegetation types. QV had a higher average effective water recharge rate than lateral cypress and oleander and could better utilize the water recharge from storm water.

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Water use strategy of Platycladus orientalis in Beijing mountainous area

Cited by 2 publications

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Tree Crown Affects Biomass Allocation and Its Response to Site Conditions and the Density of Platycladus orientalis Linnaeus Plantation

Tree Crown Affects Biomass Allocation and Its Response to Site Conditions and the Density of Platycladus orientalis Linnaeus Plantation

Response of Soil Moisture to Long-Duration Rainstorms in Three Forest Stands in Mountainous Areas of North China

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