干旱区生态环境知识资源中心(Arid): CO2 exchange, dry matter accumulation and growth response of sorghum (Sorghum bicolor L. Moench) to terminal drought as affected by potassium and blended-NPSBZn fertilization

Arid

DOI	10.1111/jac.12469
	CO2 exchange, dry matter accumulation and growth response of sorghum (Sorghum bicolor L. Moench) to terminal drought as affected by potassium and blended-NPSBZn fertilization
	Endris, Solomon; Fetene, Masresha; Amede, Tilahun
通讯作者	Endris, S (corresponding author), Ethiopian Inst Agr Res, Addis Ababa, Ethiopia.
来源期刊	JOURNAL OF AGRONOMY AND CROP SCIENCE
ISSN	0931-2250
EISSN	1439-037X
出版年	2021
卷号	207 期号:3 页码:450-464
英文摘要	Sorghum production is constrained by terminal drought stress in semi-arid areas of north-eastern Ethiopia. Data from field experiments conducted in the region for two consecutive years (2015 - 2016) were used to investigate the effect of potassium (K) and NPSBZn-blended fertilizer (BF) inputs on the drought response of sorghum through analysis of gas exchange, dry matter accumulation and growth parameters. Leaf gas exchange properties varied strongly with K and BF application both under normal rainfall and drought conditions. Data taken at anthesis in drought-exposed sorghum indicated reduction of net photosynthetic rate (A(N)) with BF supply. A(N) declined from 15.7 mu mol CO2/m(2)/s in the control to 13.4 mu mol CO2/m(2)/s with application of 164 kg/ha BF. However, higher total dry matter yield was recorded at maturity in response to blended fertilizer and K inputs. Increasing supply of NPSBZn-blended fertilizer was associated with declining leaf K content, increasing intercellular CO2 concentration and water use efficiency (WUE) during anthesis. Significant variations in crop growth rates were also observed in response to K and BF inputs. At physiological maturity, net assimilation rate (NAR) increased with K and BF inputs both under drought and normal rainfall conditions. In general, K application modulated the response of sorghum to BF input under both normal rainfall and drought conditions. Therefore, grain sorghum could benefit from early supply of K and BF fertilizer in drought prone areas of Northeastern Ethiopia.
英文关键词	blended fertilizer chlorophyll drought gas exchange growth sorghum
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000633541400001
WOS类目	Agronomy
WOS研究方向	Agriculture
来源机构	International Crops Research Institute for the Semi-Arid Tropics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350651
作者单位	[Endris, Solomon] Ethiopian Inst Agr Res, Addis Ababa, Ethiopia; [Fetene, Masresha] Addis Ababa Univ, Addis Ababa, Ethiopia; [Amede, Tilahun] Int Crops Res Inst Semi Arid Trop, Addis Ababa, Ethiopia
推荐引用方式 GB/T 7714	Endris, Solomon,Fetene, Masresha,Amede, Tilahun. CO2 exchange, dry matter accumulation and growth response of sorghum (Sorghum bicolor L. Moench) to terminal drought as affected by potassium and blended-NPSBZn fertilization[J]. International Crops Research Institute for the Semi-Arid Tropics,2021,207(3):450-464.
APA	Endris, Solomon,Fetene, Masresha,&Amede, Tilahun.(2021).CO2 exchange, dry matter accumulation and growth response of sorghum (Sorghum bicolor L. Moench) to terminal drought as affected by potassium and blended-NPSBZn fertilization.JOURNAL OF AGRONOMY AND CROP SCIENCE,207(3),450-464.
MLA	Endris, Solomon,et al."CO2 exchange, dry matter accumulation and growth response of sorghum (Sorghum bicolor L. Moench) to terminal drought as affected by potassium and blended-NPSBZn fertilization".JOURNAL OF AGRONOMY AND CROP SCIENCE 207.3(2021):450-464.