Growth and yield of oleic sunflower (Helianthus annuus L.) under drip irrigation in very strongly saline soils

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	Growth and yield of oleic sunflower (Helianthus annuus L.) under drip irrigation in very strongly saline soils
	Jiang Shufang; Wan Shuqin
	2013
关键词	Subirrigation Cultivation Forestry Soil moisture
英文摘要	A four-year trial was set up to test the feasibility of growing oleic sunflower in a very strongly saline wasteland with drip irrigation in the Ningxia plain of Northwest China. The soil salinity expressed as electrical conductivity of the saturation paste extract (ECe) was around 28 dS/m, and soil nutrient was deficient in the upper 120 cm depth. The experiment included five soil matric potential (SMP) treatments, with the SMP at 20-cm depth immediately under the emitters maintained to be higher than -5, -10, -15, -20 and -25 kPa after sunflower establishment. Drip irrigation consistently created a favourable soil moisture and low-salinity region in the root zone when the SMP was maintained higher than -25 kPa. The sunflower dry seed yield decreased by 3.8 % for each unit increase in seasonal average soil salinity in the root zone. Plant vegetative growth, yield characteristics, irrigation frequency and irrigation amount all increased with the increase in SMP from -25 to -5 kPa, and the highest irrigation water use efficiency was available when the SMP was between -10 and -15 kPa (the amount of applied water was around 750 mm). Leaching of salts by drip irrigation gradually turned the very strongly saline soil into a moderately saline soil. This research suggests that drip irrigation can be successfully used in oleic sunflower cultivation in this highly saline soil and a SMP threshold between -10 and -15 kPa is suggested for irrigation scheduling. 2012 Springer-Verlag.
出处	Irrigation Science
卷	31 期:5 页:943-957
收录类别	EI
内容类型	EI期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/31378]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Jiang Shufang,Wan Shuqin. Growth and yield of oleic sunflower (Helianthus annuus L.) under drip irrigation in very strongly saline soils. 2013.