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	Grain yield, dry matter accumulation and remobilization, and root respiration in winter wheat as affected by seeding rate and root pruning
	Fang, Yan1,2,3,4; Xu, Bing-cheng1,2,3; Turner, Neil C.5,6; Li, Feng-Min1,2,3
刊名	European journal of agronomy
	2010-11-01
卷号	33期号:4页码:257-266
关键词	Drought Photosynthesis Semi-arid loess plateau Triticum aestivum Water-use efficiency
ISSN号	1161-0301
DOI	10.1016/j.eja.2010.07.001
通讯作者	Li, feng-min(fmli@lzu.edu.cn)
英文摘要	Field experiments conducted in 2007/08 and 2008/09 at the changwu agricultural research station on the loess plateau of china comprised three seeding rates (sr1: 225 seeds m(-2), sr2: 280 seeds m(-2), and sr3: 340 seeds m(-2)) and two root pruning treatments (w: root pruning in the over-wintering period and s: root pruning at the spring-growth stage), with the un-pruned wheat plants as controls. in the severe drought toward the end of the growing season of 2008, grain yield decreased as the seeding rate increased, but under the more favorable conditions in 2009 the reverse was true. averaged over the seeding rates, grain yield was significantly increased in both w and s in both years; grain yield and yield components were higher in w; and s recorded the highest water use efficiency. the interaction between seeding rate and root pruning was not statistically significant. leaf area index (lai) and tiller density were higher as seeding rates increased whereas in w and s. increased lai and decreased tillers significantly, but had no effect on fertile tillers. the rate of leaf photosynthesis was lower and root respiration was significantly higher at higher seeding rates, whereas in root pruning treatments, significantly higher leaf photosynthetic rate and lower root respiration were observed. soil water contents were lower as seeding rate increased. a significant decrease in water use before stem elongation was observed in w, while s consumed less soil water than w and the control over the whole growing season. post-heading accumulation of dry matter and its remobilization from vegetative parts to the grain was significantly greater at higher seeding rates. post-heading accumulations of dry matter and grain yield were also significantly greater in w and s than the un-pruned plants, although pruning reduced both dry matter remobilization and its contribution to grain yield. the possibility of reducing the proliferation of roots to increase yields at higher seeding rates and conserving the soil water at different growing stages in water-limited environments is discussed. 2010 elsevier b.v. all rights reserved.
WOS关键词	WATER-USE EFFICIENCY ; DURUM-WHEAT ; SOIL TYPE ; NO-TILL ; NITROGEN ACCUMULATION ; COMPETITIVE ABILITY ; CULTIVAR INFLUENCE ; WESTERN-AUSTRALIA ; GENETIC-VARIATION ; PLANTING DATE
WOS研究方向	Agriculture
WOS类目	Agronomy
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000284345800001
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2408856
专题	中国科学院大学
通讯作者	Li, Feng-Min
作者单位	1.Lanzhou Univ, MOE Key Lab Arid & Grassland Ecol, Lanzhou 730000, Gansu, Peoples R China 2.Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi Prov, Peoples R China 3.Minist Water Resources, Yangling 712100, Shaanxi Prov, Peoples R China 4.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 5.Univ Western Australia, Ctr Legumes Mediterranean Agr, Crawley, WA 6009, Australia 6.Univ Western Australia, Inst Agr, Crawley, WA 6009, Australia
推荐引用方式 GB/T 7714	Fang, Yan,Xu, Bing-cheng,Turner, Neil C.,et al. Grain yield, dry matter accumulation and remobilization, and root respiration in winter wheat as affected by seeding rate and root pruning[J]. European journal of agronomy,2010,33(4):257-266.
APA	Fang, Yan,Xu, Bing-cheng,Turner, Neil C.,&Li, Feng-Min.(2010).Grain yield, dry matter accumulation and remobilization, and root respiration in winter wheat as affected by seeding rate and root pruning.European journal of agronomy,33(4),257-266.
MLA	Fang, Yan,et al."Grain yield, dry matter accumulation and remobilization, and root respiration in winter wheat as affected by seeding rate and root pruning".European journal of agronomy 33.4(2010):257-266.

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