作　　者： ; ; ; ; ; ; ;

机构地区： 北京林业大学林学院

出　　处： 《林业科学研究》 2012年第1期107-110,共4页

摘　　要： 龟裂碱土主要分布在宁夏银川平原,是贺兰山碱化山体土壤在山洪冲击下淤积于银川平原而成。由于这种土壤干时地表皲裂似龟背状,故称＂龟裂碱土＂,也因土壤质地坚硬,表面呈白色,又称＂白僵土＂[1]。 In this study,the rhizosphere soil properties of Takyr Solonetzs ameliorated with FGDG,and its effect on root growth of Lycium barbarum were studied.The results indicated that with increasing applications of FGDG,the contents of Na＋,K＋,Mg2＋,Cl-,and HCO3-in rhizosphere soil decreased gradually with the ratio of 51.9%,16.7%,42.7%,44.7% and 28.2%,respectively,while the contents of Ca2＋ and SO42-showed an increasing trend and increased by 96.9% and 80.4% compared with those of the CK.As the content of exchangeable Na＋ decreased with the increasing application of FGDG,the exchangeable sodium percentage（ESP） and soil pH values decreased from 32.2% and 10.5 to 18.1% and 7.82,respectively and thus the soil physical properties improved.However,the lowest total salt content（2.91 g·kg-1） was found in T2（2.5 t/（667m2））,and similarly,the highest values of taproot length（44.78 cm）,root surface area（179.97 cm2） and root dry weight（17.53 g） were also found in T2,which suggested that applications of FGDG were not always positively correlated with soil reclamation,and excessive amount of FGDG would inhibit root＇s growth.Overall,application of FGDG is effective in ameliorating Takyr Solonetzs,but high amount of FGDG would result in excess salts against root growth and subsequently influence production.

关 键 词： 脱硫石膏 龟裂碱土 土壤盐分 枸杞 根系

领　　域： [农业科学]