Soil addition improves multifunctionality of degraded grasslands through increasing fungal richness and network complexity

被引：10

作者：

Li, Yuhui ^{[1
,2
]}

Han, Xu ^{[1
,2
,3
]}

Li, Bing ^{[1
,2
]}

Li, Yingbin ^{[1
]}

Du, Xiaofang ^{[1
]}

Sun, Yixin ^{[1
,2
]}

Li, Qi ^{[1
]}

Bezemer, Martijn ^{[4
,5
]}

机构：

[1] Chinese Acad Sci, Inst Appl Ecol, Erguna Forest Steppe Ecotone Res Stn, Shenyang 110016, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Beihua Univ, Forestry Coll, Jilin 132013, Peoples R China

[4] Netherlands Inst Ecol NIOO KNAW, Dept Terr Ecol, NL-6700 AB Wageningen, Netherlands

[5] Leiden Univ, Inst Biol, Above Belowground Interact Grp, NL-2300 RA Leiden, Netherlands

来源：

GEODERMA | 2023年 / 437卷

关键词：

Fungal richness; Network complexity; Ecosystem multifunctionality; Soil addition; Grassland restoration; ECOSYSTEM MULTIFUNCTIONALITY; PLANT DIVERSITY; BIODIVERSITY; PRODUCTIVITY; PATTERNS; NITROGEN;

D O I：

10.1016/j.geoderma.2023.116607

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Soil addition is now widely used in the restoration of degraded ecosystems, but how soil addition influences multiple ecological functions of degraded grasslands, and whether these effects depend on the amount and type of soil inoculum, are still not clear. We performed two parallel experiments to examine how two different donor soil types and two amounts of donor soil addition affect the restoration of degraded grassland. In a field experiment at a degraded grassland site where the top layer of the soil was removed (5 cm), we assessed the effect of addition of soil collected from two different ecosystems (upland meadow and meadow steppe) and addition of different amounts of soil (0 cm, 1 cm and 3 cm) on ecosystem multifunctionality. In a microcosm experiment, we examined the effects of soil biotic and abiotic factors on ecosystem functions by inoculating sterilized and non-sterilized soil. Soil addition promoted the restoration of degraded grassland, particularly when higher amounts of soil were added. Both biotic and abiotic factors increased ecosystem multifunctionality. Biotic factors, especially fungal richness and network complexity, had the strongest positive effects on ecosystem multifunctionality. Our study reveals the importance of fungal communities in soil for improving ecosystem multifunctionality in restoration of degraded grassland. Future studies should explore the effects of joint addition of arbuscular mycorrhizal fungi and saprophytic fungi on the ecosystem functions of degraded grasslands.

引用

页数：13