The Effect of Fertilization and Grazing Applications on Root Length and Root Biomass of Some Rangeland Grasses

Yavuz, Tamer; Karadağ, Yaşar

doi:10.17557/.36557

Cited by 6 publications

(2 citation statements)

References 33 publications

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“…Grazing affects plant growth, degrades the physical structure of soil, and reduces water permeability of soil, thereby affecting soil spatial distribution (Chen et al, 2013 ; Liu, Lü, et al, 2018 ; Yavuz & Karadag, 2015 ). Studies have shown that plants can preferentially find nutrients in “exotic” soil patches in spatially heterogeneous soils, which may reduce imbalance of inter‐species competition (Hendriks et al, 2015 ; Xue et al, 2018 ).…”

Section: Discussionmentioning

confidence: 99%

Heavy grazing causes plant cluster fragmentation of sparse grasses

Wang,

Lv,

Liu

et al. 2023

Ecology and Evolution

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Cleistogenes songorica, as a clustered grass, is the main grassland flora of the Stipa breviflora desert grassland. Some studies have shown that the constructive species of S. breviflora (sparse cluster type) is prone to cluster fragmentation; however, research on C. songorica is relatively rare. Then will the C. songorica plant population (dense cluster type) also have cluster fragmentation under the influence of intense grazing? To answer this question, we used variance analysis and geo‐statistical methods. The spatial distribution of C. songorica in S. breviflora desert steppe in Inner Mongolia was measured under four grazing intensities (no grazing, CK, 0 sheep·ha−1·half year−1; light grazing, LG, 0.93 sheep·ha−1·half year−1; moderate grazing, MG, 1.82 sheep·ha−1·half year−1; and heavy grazing, HG, 2.71 sheep·ha−1·half year−1) and four scales (10 cm × 10 cm, 20 cm × 20 cm, 25 cm × 25 cm, 50 cm × 50 cm). We then analyzed C. songorica whether fragmentation was present. The results showed that increased grazing intensity is associated with increased density and decreased height, coverage, and standing crop of C. songorica. The spatial distribution of C. songorica was affected by structural factors, and spatial heterogeneity decreased with increased spatial scale. With increased grazing intensity and spatial scale, the patch area of C. songorica gradually increased and tended toward band distribution. In summary, increased grazing intensity and spatial scale led to weakened heterogeneity of C. songorica spatial distribution and increased consistency.

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Section: Discussionmentioning

confidence: 99%

Heavy grazing causes plant cluster fragmentation of sparse grasses

Wang,

Lv,

Liu

et al. 2023

Ecology and Evolution

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“…On one hand, grazing disturbance influences seed availability for seedling emergence by affecting seed production and seed distribution in soil; for instance, research showed that total seed density and species richness in the soil seed bank was higher in grazed grassland than in enclosed grassland (Zuo et al, 2013). On the other hand, grazing alters the habitats on which seedling emergence and survival rely, such as soil compaction, water permeability, and holding capacity (Oesterheld & Sala, 1990; Osem et al, 2006; Taddese et al, 2002; Yavuz & Karadağ, 2015). The changes in seed availability and environmental factors further cause the difference in seedling number, richness and composition, and determine seedling growth and survival (Schuster et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Grazing alters seedling emergence number, dynamics, and diversity of herbaceous plants in a semiarid sandy grassland

Liu

Wang

et al. 2022

Ecological Research

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Overgrazing in semiarid grassland is a major cause of vegetation degradation. Understanding the changes in seedling patterns driven by grazing is crucial to unveiling mechanisms of plant community regeneration and succession in grazed grassland. However, the dynamics of seedling emergence and species diversity under grazing are rarely studied. This study used periodical field investigation to examine the variation in seedling emergence, plant diversity, species composition, and seedling survival of herbaceous plants under four grazing intensities, including light (LG), moderate (MG), heavy (HG), and non-grazed (NG), in a semiarid sandy grassland. The results showed that seedling number and density were significantly higher in HG plots, while the seedling survival rate was significantly lower in HG, and that seedling emergence dynamics varied with grazing. Seventy-five percent of the seedlings in HG emerged during early spring in April, while approximately 50% of the seedlings in LG, MG, and NG emerged in May. Differences in species richness and diversity varied with growth stages and the diversity was always higher in LG than in other grazing habitats during the main growing season. Annual forb seedlings increased while annual grass seedlings decreased after grazing with no perennial grass seedlings in HG. Our study suggests that high seedling emergence but low seedling survival rate, and simple species composition especially the disappearance of perennial plants caused by HG may be an important factor leading to vegetation degradation in the semiarid grazed grassland.

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