干旱区生态环境知识资源中心(Arid): Exploring the effect of tillers on the water economy, plant growth and kernel set of low-density maize crops

Arid

DOI	10.1016/j.agwat.2020.106424
	Exploring the effect of tillers on the water economy, plant growth and kernel set of low-density maize crops
	Diego Hernan, Rotili; Gabriela, Abeledo L.; deVoil, Peter; Daniel, Rodriguez; Gustavo Angel, Maddonni
通讯作者	Hernan, RD (corresponding author), Univ Buenos Aires, Fac Agron, Dept Prod Vegetal, Catedra Cerealicultura, Av San Martin 4453,C1417DSE, Buenos Aires, DF, Argentina.
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2021
卷号	243
英文摘要	In semi-arid production regions having a high inter-annual rainfall variability, farmers use low plant densities, that promote tillering in maize (Zea mays L.). Tillering in maize is a scarcely researched trait, even though it offers vegetative and reproductive plasticity. However, the production of tillered maize crops may be risky due to a possible early soil water depletion and/or low reproductive efficiency. Here, we explored the potential effects of tillers (0, 1 and 2 tillers pl(-1)) on the water economy, plant growth and kernel set of maize crops at a low plant density (2 pl m(-2)) through the combination of simulations (using an adapted version of APSIM Sorghum model) and field experiments. The simulated scenarios included six locations across Argentina and Australia and three levels of available soil water content at sowing (50 %, 70 % and 90 %). In humid environments, simulated crops with increased number of tillers pl(-1) expressed high vegetative plasticity (up to three-fold increases in leaf area index at flowering), driving high values of crop evapotranspiration during the pre-flowering period (EtaPF). In drier environments, simulated EtaPF was similar between crops with different tiller number pl(-1). Manipulative field experiments were established to parameterize the function between kernel number per plant (KNP) as a function of plant growth rate around flowering (PGRF) for tillered and non-tillered plants. At low PGRF, tillered plants had lower KNP than non-tillered plants, though the opposite was evident at high PGRF. Interestingly, when simulated PGRF values were used to predict kernel number m(-2) (KN m-2), increases in KN m(-2) of tillered maize crops in humid environments were larger than the decreases in drier environments. Consequently, farmers could benefit by choosing tillering maize genotypes in the long term when sowing low plant densities.
英文关键词	Tillering Evapotranspiration Kernel setting Low plant population density Crop simulation models
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000594659800004
WOS关键词	GRAIN-YIELD COMPONENTS ; CORN ZEA-MAYS ; LEAF-AREA ; NUMBER DETERMINATION ; POPULATION DENSITY ; USE EFFICIENCY ; WINTER-WHEAT ; EVAPOTRANSPIRATION ; TRANSPIRATION ; RESPONSES
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/347668
作者单位	[Diego Hernan, Rotili; Gabriela, Abeledo L.; Gustavo Angel, Maddonni] Univ Buenos Aires, Fac Agron, Dept Prod Vegetal, Catedra Cerealicultura, Av San Martin 4453,C1417DSE, Buenos Aires, DF, Argentina; [Diego Hernan, Rotili; Gustavo Angel, Maddonni] Univ Buenos Aires, Fac Agron, Inst Invest Fisiol & Ecol Vinculadas Agr IFEVA, Consejo Nacl Invest Cient & Tecn CONICET, Buenos Aires, DF, Argentina; [Gabriela, Abeledo L.] Consejo Nacl Invest Cient & Tecn CONICET, Buenos Aires, DF, Argentina; [deVoil, Peter; Daniel, Rodriguez] Univ Queensland, Ctr Crop Sci, Queensland Alliance Agr & Food Innovat QAAFI, Gatton Campus, Gatton, Qld 4343, Australia
推荐引用方式 GB/T 7714	Diego Hernan, Rotili,Gabriela, Abeledo L.,deVoil, Peter,et al. Exploring the effect of tillers on the water economy, plant growth and kernel set of low-density maize crops[J],2021,243.
APA	Diego Hernan, Rotili,Gabriela, Abeledo L.,deVoil, Peter,Daniel, Rodriguez,&Gustavo Angel, Maddonni.(2021).Exploring the effect of tillers on the water economy, plant growth and kernel set of low-density maize crops.AGRICULTURAL WATER MANAGEMENT,243.
MLA	Diego Hernan, Rotili,et al."Exploring the effect of tillers on the water economy, plant growth and kernel set of low-density maize crops".AGRICULTURAL WATER MANAGEMENT 243(2021).