干旱区生态环境知识资源中心(Arid): Soil rock content influences the maximum seedling emergence depth of a dominant arid zone grass

Arid

DOI	10.1007/s11104-020-04493-5
	Soil rock content influences the maximum seedling emergence depth of a dominant arid zone grass
	Masarei, Monte 1; Astfalck, Lachlan C.2; Guzzomi, Andrew L.1; Merritt, David J.3,4; Erickson, Todd E.3,4
通讯作者	Masarei, Monte
来源期刊	PLANT AND SOIL
ISSN	0032-079X
EISSN	1573-5036
出版年	2020
卷号	450 期号:1-2 页码:497-509
英文摘要	Aims We aimed to understand the influence of differing soil rock content on seedling emergence of a dominant arid zone grass critical to mine restoration (Triodia pungens R.Br.). We assessed whether emergence mortality resulting from seedlings failing to navigate rocky soils contributes meaningfully to failed recruitment and the maximum emergence depth. Methods Cleaned seeds and florets (the natural dispersal unit) were buried at discrete depths of 0, 5, 10, 15, 20, 30, and 40 mm in three soil-rock matrices of varying rock content (soil sieved to <5 mm, sieved to <25 mm, or left un-sieved). Results Rock content reduced emergence of seeds buried below 15 mm and truncated the maximum emergence depth. When seeds were buried at 5 mm; near the modelled 6.0 mm optimal depth, any failure to emerge was largely attributable to failed seed germination. However, when seeds were buried greater than 20 mm, failure of pre-emergent seedlings to reach the surface became the significant factor contributing to failed emergence. Florets failed to recruit under all scenarios. Conclusions Soil rock content can influence critical seed germination and emergence life stages and therefore the optimal seed recruitment depth. Emergence of deeply (>20 mm) buried seeds is likely restricted by rocks imposing a physical barrier to recruitment.
英文关键词	Burial depth Dryland Native seeds Precision placement Restoration Rocky soil
类型	Article
语种	英语
国家	Australia
收录类别	SCI-E
WOS记录号	WOS:000528502700002
WOS关键词	GERMINATION ; DESERT ; RESTORATION ; BURIAL ; PLANT ; RECRUITMENT ; DYNAMICS ; TRAITS ; SEEDS ; FIRE
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS研究方向	Agriculture ; Plant Sciences
来源机构	University of Western Australia
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315331
作者单位	1.Univ Western Australia, Sch Engn, Crawley, WA, Australia; 2.Univ Western Australia, Oceans Inst, Crawley, WA, Australia; 3.Kings Pk Sci, Dept Biodivers Conservat & Attract, Kings Pk, WA, Australia; 4.Univ Western Australia, Sch Biol Sci, Crawley, WA, Australia
推荐引用方式 GB/T 7714	Masarei, Monte,Astfalck, Lachlan C.,Guzzomi, Andrew L.,et al. Soil rock content influences the maximum seedling emergence depth of a dominant arid zone grass[J]. University of Western Australia,2020,450(1-2):497-509.
APA	Masarei, Monte,Astfalck, Lachlan C.,Guzzomi, Andrew L.,Merritt, David J.,&Erickson, Todd E..(2020).Soil rock content influences the maximum seedling emergence depth of a dominant arid zone grass.PLANT AND SOIL,450(1-2),497-509.
MLA	Masarei, Monte,et al."Soil rock content influences the maximum seedling emergence depth of a dominant arid zone grass".PLANT AND SOIL 450.1-2(2020):497-509.