干旱区生态环境知识资源中心(Arid): Growing Corn in Clumps Reduces Canopy Temperature and Improves Microclimate

Arid

DOI	10.1080/15427528.2016.1217445
	Growing Corn in Clumps Reduces Canopy Temperature and Improves Microclimate
	Thapa, Sushil; Stewart, B. A.; Xue, Qingwu; Pokhrel, Pramod; Barkley, Timber; Bhandari, Mahendra
通讯作者	Thapa, S
来源期刊	JOURNAL OF CROP IMPROVEMENT
ISSN	1542-7528
EISSN	1542-7536
出版年	2016
卷号	30 期号:6 页码:614-631
英文摘要	Uniform or evenly spaced planting (ESP) geometry is practiced when resources, such as water, are nonlimiting for growing crops, but under resource-limited environments, nonuniform treatment of the land can be an advantage. Corn (Zea mays L.) field studies were conducted in Gruver (Gruver field study, GFS) and Bushland (Bushland field study, BFS), Texas to compare plant canopy temperature, within-canopy vapor pressure deficit (VPD), grain yield, and yield components for clump (3 plants clustered) and ESP geometries with the same plant populations. At different growth stages for both studies, thermal images were taken for calculating canopy temperature (CT), and temperature and relative humidity (RH) within the plant canopy weremeasured. Overall, CTs were significantly lower for clumps compared with ESPs, andmean VPDs within the clumps were consistently lower than those for ESPs, indicating that clumps improved the microclimate. Compared with ESPs, clumps produced similar or higher grain yields, and harvest index (HI) was significantly higher for clumps than that for ESPs in both studies (0.56 vs. 0.54 in GFS and 0.48 vs. 0.45 in BFS). In GFS, plants were grown under three water levels (high, medium, and low). With decreasing irrigation level, canopy temperature and VPD increased and aboveground biomass, grain yield, and HI decreased. Results suggested that growing corn in clumps might be a useful strategy under semi-arid climatic conditions because they reduced CT, improved microclimate, decreased number of tillers, and increased HI with comparable grain yield compared with conventional ESPs.
英文关键词	Canopy temperature dryland evenly spaced planting microclimate vapor pressure deficit Zea mays
类型	Article
语种	英语
收录类别	ESCI
WOS记录号	WOS:000452745500002
WOS类目	Agronomy ; Plant Sciences
WOS研究方向	Agriculture ; Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/332033
作者单位	[Thapa, Sushil; Xue, Qingwu] Texas A&M AgriLife Res & Extens Ctr, 6500 W Amarillo Blvd, Amarillo, TX 79106 USA; [Thapa, Sushil; Stewart, B. A.; Pokhrel, Pramod; Barkley, Timber; Bhandari, Mahendra] West Texas A&M Univ, Dryland Agr Inst, Canyon, TX USA
推荐引用方式 GB/T 7714	Thapa, Sushil,Stewart, B. A.,Xue, Qingwu,et al. Growing Corn in Clumps Reduces Canopy Temperature and Improves Microclimate[J],2016,30(6):614-631.
APA	Thapa, Sushil,Stewart, B. A.,Xue, Qingwu,Pokhrel, Pramod,Barkley, Timber,&Bhandari, Mahendra.(2016).Growing Corn in Clumps Reduces Canopy Temperature and Improves Microclimate.JOURNAL OF CROP IMPROVEMENT,30(6),614-631.
MLA	Thapa, Sushil,et al."Growing Corn in Clumps Reduces Canopy Temperature and Improves Microclimate".JOURNAL OF CROP IMPROVEMENT 30.6(2016):614-631.