Influence of mulches on urban vegetation construction in coastal saline land under drip irrigation in North China

摘要: In order to generate information for reclaiming coastal saline sandy-loam soil urban vegetation construction around Bohai Bay in North China, a field experiment combined with drip irrigation and setting gravel-sand layer beneath the but above water table was conducted study effect of mulches on irrigated amount, salt control willow (Salix babylonica L) growth, costs were also estimated during 2012 2013. The three mulch treatments treatment no (C1), black shading net (C2) straw (C3). leach salts profile, triggered by matric potential threshold at 20-cm depth -5 kPa early stage, this changed -10 until end first growing year, -20 second year. results showed that (1) consumed least water, followed treatment. Compared treatment, amount had decreased 12% 27% (2) salinity reduction mainly related rainfall strategy irrigation; mulches, especially mulch, risk accumulation spring. (3) best growth characteristic plants optimal investment cost high due preparation willows, gravel sand then it 90% From points saving, plant cost, use could aid land China. (C) 2015 Elsevier B.V. All rights reserved.