气候变化领域集成服务门户(CCPortal): Nutrient addition alters plant community productivity but not the species diversity of a mountain meadow in Tajikistan

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DOI	10.3389/fpls.2023.1235388
	Nutrient addition alters plant community productivity but not the species diversity of a mountain meadow in Tajikistan
	Mekhrovar, Okhonniyozov; Li, Yao-ming; Abdullo, Madaminov; Sino, Yusupov; Fan, Lianlian
发表日期	2024
ISSN	1664-462X
起始页码	14
卷号	14
英文摘要	Introduction: Tajikistan is a typical mountainous country covered by different mountain grasslands that are important pasture resources. Recently, grassland degradation has become widespread due to climate change and human activities and fertilization has been used to improve grassland production. However, fertilizer inputs can substantially alter species diversity, but it is uncl\ear how productivity and species diversity respond to nutrient enrichment in the mountain meadows of Tajikistan. Methods: Therefore, a 5-year (2018-2022) continuous in-situ mineral fertilizer experiment was conducted to examine the effects of three nitrogen (N) levels (0, 30, and 90 kg N ha(-1) year(-1)), two phosphorus (P) levels (0 and 30 kg P ha(-1) year(-1)), and their combinations on above-ground biomass (AGB) and species diversity in a mountain meadow grassland in Ziddi, Varzob region, Tajikistan. Five species diversity metrics-Margalef's species richness (D-ma), the Shannon-Wiener index (H), the Simpson index (C), Pielou's equitability index (E-pi), and the Evar Species Evenness index (E-var)-were used to measure species diversity. Results and discussions: The results indicated that the addition of different N and P amounts and their various combinations considerably increased both total and dominant species AGB, with the highest increase occurring in the N90P30 (90 kg N ha(-1) year(-1) combined with 30 kg P ha(-1) year(-1)) treatment in 2022; during the experiment, the importance value of Prangos pabularia (dominant species) first decreased and then increased, but its dominant status did not change or fluctuate among the years. Furthermore, N, P, and their different combinations had no significant effect on species diversity (D-ma, H, C, E-pi, and E-var). All the species diversity indexes fluctuated among years, but there was no interaction with mineral fertilizer addition. Total AGB had a negative relationship with species diversity and low concentration N fertilizer addition (N30; P30) strengthened this negative trend. However, this trend decreased under the high N fertilizer condition (N90P30). Overall, nutrient addition to the natural mountain grassland of the Varzob region improved AGB, which meant that there was more forage for local animals. Mineral fertilizers had no significant effect on species diversity, but may enhance P. pabularia dominance in the future, which will help maintain the stability of the plant community and improve the quality of the forage because P. pabularia is an excellent and important winter fodder. Our study suggests that scientific nutrient management could effectively promote grassland production, conserve plant variety, and regenerate degraded grassland, which will counteract the desertification process in northwest Tajikistan mountain meadows.
英文关键词	Prangos pabularia Lindl.; nutrient addition; above-ground biomass; grassland; Central Asia
语种	英语
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:001150746000001
来源期刊	FRONTIERS IN PLANT SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/306390
作者单位	Chinese Academy of Sciences; Xinjiang Institute of Ecology & Geography, CAS; Chinese Academy of Sciences; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Academy of Sciences of Republic of Tajikistan
推荐引用方式 GB/T 7714	Mekhrovar, Okhonniyozov,Li, Yao-ming,Abdullo, Madaminov,et al. Nutrient addition alters plant community productivity but not the species diversity of a mountain meadow in Tajikistan[J],2024,14.
APA	Mekhrovar, Okhonniyozov,Li, Yao-ming,Abdullo, Madaminov,Sino, Yusupov,&Fan, Lianlian.(2024).Nutrient addition alters plant community productivity but not the species diversity of a mountain meadow in Tajikistan.FRONTIERS IN PLANT SCIENCE,14.
MLA	Mekhrovar, Okhonniyozov,et al."Nutrient addition alters plant community productivity but not the species diversity of a mountain meadow in Tajikistan".FRONTIERS IN PLANT SCIENCE 14(2024).