English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Abstract. Rocky desertification is a major ecological problem of land degradation inkarst areas. In these areas, the high soil calcium (Ca) content has become animportant environmental factor that can affect the restoration of vegetation.Consequently, the screening of plant species that can adapt to high Ca soilenvironments is a critical step in vegetation restoration. In this study,three grades of rocky desertification sample areas were selected in karstareas of southwestern Hunan, China (LRD: light rocky desertification; MRD:moderate rocky desertification; and IRD: intense rocky desertification). Eachgrade of these sample areas had three sample plots in different slope positions,each of which had four small quadrats (one in rocky-side areas, three innon-rocky-side areas). We measured the Ca content of leaves, branches, androots from 41 plant species, as well as soil total Ca (TCa) and exchangeableCa (ECa) at depths of 0–15, 15–30, and 30–45 cm in each small quadrat. Theresults showed that the soil Ca2+ content in rocky-side areas wassignificantly higher than that in non-rocky-side areas (p&lt;0.05). The meansoil TCa and ECa content increased gradually along with the grade of rockydesertification, in the order IRD &gt; MRD &gt; LRD. Forall plant functional groups, the plant Ca content of aboveground parts wassignificantly higher than that of the belowground parts (p&lt;0.05). The soilECa content had significant effects on plant Ca content of the belowgroundparts but had no significant effects on plant Ca content of the abovegroundparts. Of the 41 plant species that were sampled, 17 were found to bedominant (important value &gt; 1). The differences inCa2+ content between the aboveground and belowground parts of the17 dominant species were calculated, and their correlations with soil ECacontent were analyzed. The results showed that these 17 species can bedivided into three categories: Ca-indifferent plants, high-Ca plants, andlow-Ca plants. These findings provide a vital theoretical basis and practicalguide for vegetation restoration and ecosystem reconstruction in rockydesertification areas.

Calcium content and high calcium adaptation of plants in karst areas of southwestern Hunan, China