干旱区生态环境知识资源中心(Arid): Leaching fraction impacts water use efficiency and nutrient losses in maize crop under salt stress

Arid

DOI	10.1590/1807-1929/agriambi.v26n11p797-806
	Leaching fraction impacts water use efficiency and nutrient losses in maize crop under salt stress
	Freitas, Emanuel D.; de Lacerda, Claudivan F.; Amorim, Aiala, V; Ferreira, Jorge F. da S.; Costa, Carlos A. G.; da Silva, Alexsandro O.; Gheyi, Hans R.
通讯作者	Freitas, ED
来源期刊	REVISTA BRASILEIRA DE ENGENHARIA AGRICOLA E AMBIENTAL
ISSN	1415-4366
EISSN	1807-1929
出版年	2022
卷号	26 期号:11 页码:797-806
英文摘要	Although leaching fraction (LF) is used to remove salts from the root zone under conditions of salinity, if miscalculated, it can decrease water use efficiency and lead to major losses of essential nutrients. This study evaluated the water use efficiency, leaf nutrient concentrations in maize plants, and nutrient losses as a function of two ways of determining the LF in maize crop grown in soil columns under salt stress. The experimental design used was completely randomized, with treatments arranged in split plots, with seven replicates. The plots were formed b two methods of determination of LF, and the subixots by four electrical conductivities of irrigation water - ECw (0.5, 2.0, 4.0, and 6.0 dS m(-1)). The leaching fractions were established according to 1) the formula proposed by Rhoades (RHO) and 2) by applying a LF of 0.15 calculated according to the soil water balance (SWB). The leaf concentrations of N, P, Ca, and Mg were higher in plants under SWB than under RHO method. The leaf concentrations of N, P, and K decreased with increased salinity, regardless of the LF. Adding a LF of 0.15 according to SWB resulted in decreased losses of nutrients and hither physical water productivity, as compared to the RHO. Thus, a more precise determination of the LF is needed to increase economic returns for maize cultivation in semi-arid regions when using brackish water for irrigation.
英文关键词	Zea mays L. salt stress leaching of nutrients water productivity
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000843950500005
WOS关键词	PLANT-TISSUE ; NITROGEN ; NITRATE ; SOIL
WOS类目	Agricultural Engineering
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/394288
推荐引用方式 GB/T 7714	Freitas, Emanuel D.,de Lacerda, Claudivan F.,Amorim, Aiala, V,et al. Leaching fraction impacts water use efficiency and nutrient losses in maize crop under salt stress[J],2022,26(11):797-806.
APA	Freitas, Emanuel D..,de Lacerda, Claudivan F..,Amorim, Aiala, V.,Ferreira, Jorge F. da S..,Costa, Carlos A. G..,...&Gheyi, Hans R..(2022).Leaching fraction impacts water use efficiency and nutrient losses in maize crop under salt stress.REVISTA BRASILEIRA DE ENGENHARIA AGRICOLA E AMBIENTAL,26(11),797-806.
MLA	Freitas, Emanuel D.,et al."Leaching fraction impacts water use efficiency and nutrient losses in maize crop under salt stress".REVISTA BRASILEIRA DE ENGENHARIA AGRICOLA E AMBIENTAL 26.11(2022):797-806.