發(fā)布時(shí)間：2018-07-24 15:23

【摘要】：鹽堿地作為中國一種分布較為廣泛的土壤類型,主要分布在東北、華北、西北內(nèi)陸地區(qū)及中國沿海區(qū)域。因其土壤的特殊性質(zhì),鹽堿地的利用率相對較低,但在土地資源日益稀缺的今天,加快鹽堿地的開發(fā)利用顯的尤為重要。對于鹽堿地綠化,目前國內(nèi)外尚未完全攻克這一難題,而國內(nèi)針對鹽堿地綠化也提出了許多鹽堿地綠化改良技術(shù),但不同地區(qū)對相同的改良方法都表現(xiàn)出了不同的效果。本文以具有典型杭州灣沿岸鹽堿地特性的慈溪慈東濱海區(qū)為研究對象,針對慈東濱海區(qū)近年來在鹽堿地綠化施工技術(shù)上所做的嘗試,選擇具有可比性的樣本,對客土回填抬基,添加土壤改良介質(zhì)和增加土壤隔離層這三種鹽堿地綠化施工技術(shù)進(jìn)行分析比較。作者本人通過實(shí)地調(diào)查與數(shù)據(jù)采集比較后發(fā)現(xiàn),采用了隔離法的綠化工程,在工程竣工后的幾年內(nèi),無論是喬木、灌木以及土壤的理化性質(zhì)均要優(yōu)于未采用的隔離層法的其它兩項(xiàng)工程。在對土壤pH與TDS值的測量比較中,增加了隔離層法的綠化工程土壤未出現(xiàn)明顯的返堿返鹽現(xiàn)象,而其它兩項(xiàng)工程都發(fā)生了次生鹽堿化現(xiàn)象,特別是返堿現(xiàn)象尤為突出。本文通過對于慈東濱海區(qū)工程實(shí)地的試驗(yàn)與分析,結(jié)合其它地區(qū)在鹽堿地綠化上的成功案例與實(shí)際經(jīng)驗(yàn),建議慈東濱海區(qū)在重要景觀節(jié)點(diǎn)處的綠化工程采用隔離層法作為改良方法,并按照景觀要求選擇適宜的改良方法。此外,建議有著大面積綠化需求的濱海區(qū)能夠設(shè)立自己的鹽堿地引種篩選試驗(yàn)場并培育鹽堿地原生苗。希望這些建議能夠提高慈東濱海區(qū)鹽堿地綠化的景觀形象,同時(shí)為有著類似濱海鹽堿成因的環(huán)杭州灣地區(qū)的鹽堿地綠化造景提供參考與借鑒。
[Abstract]:As a widely distributed soil type in China, saline-alkali land is mainly distributed in Northeast China, North China, the inland areas of Northwest China and the coastal areas of China. The utilization rate of saline-alkali land is relatively low because of its special soil properties, but it is particularly important to accelerate the exploitation and utilization of saline-alkali land in the present day when land resources are increasingly scarce. At present, the problem of saline-alkali land greening has not been solved completely at home and abroad, and many improvement techniques for saline-alkali land greening have been put forward in our country, but different areas have different effects on the same improvement methods. In this paper, the typical saline-alkali land along the coast of Hangzhou Bay is taken as the research object. In view of the attempts made in recent years in the construction technology of saline-alkali land in the coastal area of Cixi, a comparative sample is selected to carry the base back to the guest soil. The greening construction techniques of saline-alkali soil were analyzed and compared by adding soil improvement medium and increasing soil isolation layer. Through the field investigation and data collection comparison, the author found that the greening project adopted the isolation method, in the years after the completion of the project, no matter the tree, The physicochemical properties of shrub and soil were superior to those of the other two projects. In the comparison of soil pH and TDS value, no obvious phenomenon of soil salinization occurred in the greening project with the addition of isolation layer method, while the secondary salinization phenomenon occurred in the other two projects, especially the phenomenon of returning alkali. Based on the field test and analysis of the Cidong Binhai area project, this paper combines the successful cases and practical experiences of other areas in the greening of saline-alkali land. It is suggested that the isolation layer method should be used in the greening project at the important landscape nodes in the Cedong Binhai area, and the suitable improvement method should be selected according to the landscape requirements. In addition, it is suggested that the coastal area with large green demand should set up its own test ground for introduction and screening of saline-alkali soil and cultivate the original seedlings in saline-alkali land. It is hoped that these suggestions can improve the landscape image of saline-alkali land in the coastal area of Cidong, and provide reference and reference for the greening and landscaping of the saline and alkaline land in the Huanzhou Bay area similar to the origin of the coastal salinization and alkali-alkali at the same time.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：S728.5

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