干旱区生态环境知识资源中心(Arid): Effects of Saline and Deficit Irrigation on Soil-Plant Water Status and Potato Crop Yield under the Semiarid Climate of Tunisia

Arid

DOI	10.3390/su11092706
	Effects of Saline and Deficit Irrigation on Soil-Plant Water Status and Potato Crop Yield under the Semiarid Climate of Tunisia
	Ghazouani, Hiba 1; Rallo, Giovanni 2; Mguidiche, Amel 3; Latrech, Basma 4; Douh, Boutheina 4; Boujelben, Abdelhamid 4; Provenzano, Giuseppe 5
通讯作者	Provenzano, Giuseppe
来源期刊	SUSTAINABILITY
EISSN	2071-1050
出版年	2019
卷号	11 期号:9
英文摘要	Water supplies have been decreasing in several semi-arid regions, and it is therefore necessary to adopt irrigation strategies aimed at maximizing water use efficiency. In this paper, the effects of saline and deficit irrigation on water use efficiency and on potato crop response, based on observations of soil and plant water status, were investigated. Experiments were carried out in Central Tunisia, by monitoring potato crop growth during two seasons in four distinct treatments (T1-T4), represented by two different irrigation doses and two water qualities. For irrigation scheduling purposes, thresholds of soil matric potential, soil water content and Crop Water Stress Index (CWSI) were identified with the aim to quantify the effects of water and/or salinity stress on the achievable yield. Experiments allowed verifying that crop yield is strongly affected by the seasonal amount and quality of applied water. Despite differences of crop yield between treatments T2, T3 and T4 not being statistically significant (P < 0.05), crop yield varied between 26.3 t/ha (T3 in 2015) to 16.3 t/ha (T4 in 2015). However, crop yield decline of 17.0 t/ha and 12.0 t/ha per each 100 mm decrease of applied water were observed under the application of water electrical conductivity of 1.6 dS/m and 4.1 dS/m respectively. On the other hand, an increase of 1.0 dS/m in water electrical conductivity caused a yield decline rate of about 10%. The results achieved showed that under the semi-arid climate of Tunisia, potato crop irrigation should be scheduled to avoid water deficit; however, the possibility to reduce water supply can be envisaged when water availability is limited, but with the awareness to accept the shortage of production. Finally, when saline water is the only source available to the farm, it is necessary to avoid the reduction of irrigation doses, to prevent excessive salt accumulation in the root zone with unavoidable effects on crop yield.
英文关键词	crop water status thermal imaging crop water stress index full irrigation deficit irrigation water use efficiency
类型	Article
语种	英语
国家	Tunisia ; Italy
开放获取类型	Green Published, Green Submitted, gold
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000469518700254
WOS关键词	DRIP IRRIGATION ; ECOPHYSIOLOGICAL RESPONSE ; GROWTH ; PRODUCTIVITY ; ORCHARDS ; SURFACE ; STRESS ; MODEL ; TREES
WOS类目	Green & Sustainable Science & Technology ; Environmental Sciences ; Environmental Studies
WOS研究方向	Science & Technology - Other Topics ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218997
作者单位	1.Higher Inst Biotechnol Beja, Dept Plant Biotechnol, Ave Habib Bourguiba,BP 382, Beja 9000, Tunisia; 2.Univ Pisa, DAFE, Via Borghetto 80, I-56124 Pisa, Italy; 3.Olive Inst, Unit Sousse, Ibn Khaldoun 14, Sousse 4061, Tunisia; 4.Univ Sousse, High Agron Inst Chott Meriem, Dept Rural Engn, BP 47, Chott Meriem Sousse 4042, Tunisia; 5.Univ Palermo, Dept Agr Food & Forest Sci, Viale Sci 12,Ed 4, I-90128 Palermo, Italy
推荐引用方式 GB/T 7714	Ghazouani, Hiba,Rallo, Giovanni,Mguidiche, Amel,et al. Effects of Saline and Deficit Irrigation on Soil-Plant Water Status and Potato Crop Yield under the Semiarid Climate of Tunisia[J],2019,11(9).
APA	Ghazouani, Hiba.,Rallo, Giovanni.,Mguidiche, Amel.,Latrech, Basma.,Douh, Boutheina.,...&Provenzano, Giuseppe.(2019).Effects of Saline and Deficit Irrigation on Soil-Plant Water Status and Potato Crop Yield under the Semiarid Climate of Tunisia.SUSTAINABILITY,11(9).
MLA	Ghazouani, Hiba,et al."Effects of Saline and Deficit Irrigation on Soil-Plant Water Status and Potato Crop Yield under the Semiarid Climate of Tunisia".SUSTAINABILITY 11.9(2019).