摘要
为探讨黄土高原不同盐碱化程度草地土壤的理化性质,分别于2008年秋季、2009年春季和秋季,在山西省右玉县盐碱草地0～10、10～20、20～30、30～50、50～75和75～100cm土层取土样,分析其物理特性和化学特性。结果表明,样地平均土壤容重在1.37～1.44g.cm-3,平均土壤比重在2.67～2.81,土壤呈砂质壤土的机械组成。所调查土壤碱化程度较高,土壤pH值平均在8.69～9.19,碱化度平均在20%以上。土壤可溶性盐分含量平均在0.61%～0.98%,阴离子以Cl-和HCO3-为主,阳离子以Na+和Ca2+为主,有机质和全氮缺乏。
To explore the physico chemistry properties of saline-alkaline grassland soil in the Loess Plateau, the soil of saline alkaline grassland at layers of 0--10 cm, 10 20 cm, 20--30 cm, 30--50 cm, 50--75 cm and 75--100 cm were sampled and analyzed in the fall of 2008, the spring and autumn of 2009 respectively. The results indicated that the average soil bulk density of plots was 1.37 to 1.44 g/cm^3 , and the average specific gravity of soil was 2.67 to 2.81. The soil was sandy loam of the mechanical compo nents. The soil alkalized degree was high with average soil pH between 8. 69 to 9. 19 and average exchangeable sodium percentage above 20 %. The average soil soluble salinity content was between 0.61 to 0.98%, the anion by Cl and HCO3^- primarily and the positive ion by Na＋ and Ca2＋ primarily. The organic matter and the total nitrogen in the soil were lack.
出处
《草业科学》
CAS
CSCD
北大核心
2012年第2期174-178,共5页
Pratacultural Science
基金
"十一五"国家科技支撑计划课题"退化草地植被恢复与重建关键技术研究(2007BAD56B01)"
关键词
草地
盐碱
土壤
理化性质
grassland
saline-alkaline
soil
physico-chemical properties
