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	Chinese rose (Rosa chinensis) cultivation in Bohai Bay, China, using an improved drip irrigation method to reclaim heavy coastal saline soils
	Chen X. L.; Kang, Y. H.; Wan, S. Q.; Chu, L. L.; Li, X. B.
	2015
关键词	Soil matric potential Reclamation Chinese rose Salt-sensitive plant reclamation growth management sodicity india water l.
英文摘要	This study investigated whether an improved drip irrigation method for reclaiming heavy coastal saline silt-soils could improve the growth of salt-sensitive plants threatened by soils with high salt contents and poor soil structures in Bohai Bay, China. Chinese rose (Rosa chinensis), an ornamental salt-sensitive plant, was chosen as the experiment material. The improved method used a non-saline root environment during the early stages of salt-leaching, a gravel-sand layer settled below the saline soil but above the water table and optimal soil moisture conditions. To determine the optimal soil moisture conditions, five soil matric potentials (SMPs) at 20 cm depth at -5, -10, -15, -20 and -25 kPa were studied. The results indicated that the mean soil electrical conductivity of the saturated paste extracts (ECe) and the sodium adsorption ratio (SAR) significantly declined in all five treatments. After three growing seasons, the highest desalinization ratios and SAR reductions reached 89% and 73%, respectively, compared with their initial values and these occurred in the roots of the seedlings exposed to the -5 kPa treatment. The mean ECe and SAR values increased linearly as the SMP declined. The plant survival ratio was not affected by the SMP treatment in the first growing season, due to the non-saline root zone, but decreased significantly as the SMP threshold fell in the spring of the second year, and then remained stable in the following season. The highest survival ratio reached 97% for the -5 kPa SMP treatment after three growing seasons. Stem diameter and plant height increased during three growing seasons and the largest increases occurred when the SMP was -5 kPa in first year, -10 kPa in second year and -20 kPa in third year. The largest crown diameters were recorded in the -5 kPa treatment plots in second year and -20 kPa in third year. After three years of reclamation, our results showed that this improved method, which utilized a non-saline root environment during the early stages of salt-leaching, a gravel-sand layer below the saline soil and controlled the SMP threshold of -5 kPa in the first year, -10 kPa in second year and -20 kPa in third year, can be used to reclaim coastal urban saline land for vegetation rehabilitation around Bohai Bay, China. (C) 2015 Elsevier B.V. All rights reserved.
出处	Agricultural Water Management
卷	158
页	99-111
收录类别	SCI
语种	英语
ISSN号	0378-3774
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/38566]
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	Chen X. L.,Kang, Y. H.,Wan, S. Q.,et al. Chinese rose (Rosa chinensis) cultivation in Bohai Bay, China, using an improved drip irrigation method to reclaim heavy coastal saline soils. 2015.

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