【摘要】 为了研究一种新造林模式——穴状衬膜基盘造林模式在滨海泥质盐碱地的应用效果,本文对试验地穴状衬膜基盘造林模式(New)、对照Ⅰ造林模式(ConⅠ)和对照Ⅱ造林模式(ConⅡ)造林穴内外土壤电导率值、含水量及苗木生长情况进行了分析.结果表明,通过盐碱地台田整地,试验地盐分含量逐年降低;试验地的水分和盐分含量关系密切且变化趋势相反;New模式造林穴内土壤水分较ConⅠ和ConⅡ模式分别提高16%和4%;使用衬膜技术的New模式和ConⅡ模式造林穴内土壤电导率值较ConⅠ模式分别低76%和73%;New模式桑苗的存活率、苗高和冠幅较ConⅠ模式同比高出29%,70%和30%,较ConⅡ模式同比高出11%,9%和7%;同时,使用衬膜的New模式和ConⅡ模式的根系较不使用衬膜的ConⅠ更多分布于盐分含量低的土壤浅层.研究表明,New模式具有保水阻盐,提高苗木成活率和生长量,促进浅层根系生长的作用.结合台田整地,可为苗木提供良好的生长环境,在滨海泥质盐碱地区有广阔的推广前景.更多还原

【Abstract】 In order to investigate the application effect of hole-base padded film afforestation model(New) in coastal argillaceous saline-alkali land.the survival rate and growth of Morus alba L.,the soil moisture and conductivity in and out afforestation hole in New model,contrastive Ⅰ and Ⅱ afforestation model(ConⅠ and ConⅡ) were analyzed.The results showed that the soil salt content in platform field was excluded year by year through platform field preparation.There was a close inverse relationship between the water and salt content.The soil moisture in New model raised 16% than ConⅠ model and 4% than ConⅡ model.The soil conductivity in New model and ConⅡ model decreased by 76% and 73% than Con Ⅰmodel which without film.The seedling survival rates,height and canopy area using the New model increased by an average of 29%,70% and 30% than ConⅠ model.Compared with the ConⅡ model,those values were higher by an average of 11%,9% and 7%.The seedling root using film was distributed more in the soil shallow layer which the salt content is lower than those in deep layer.These results show that New model can prevent the infiltration of salt,reduce the evaporation,improve the seedling survival rate and growth as well as promote shallow root growth.The New model along with the platform field preparation could provide a good environment and will be great prospect for the coastal argillaceous saline-alkali land.更多还原