土壤学报2012，Vol.49Issue(4)：665-672,8.
基于盐(碱)生植被盖度的土壤碱化分级
CLASSIFICATION OF SOIL ALKALIZATION BASED ON HALOPHYTE COVERAGE
摘要
Abstract
Qitai Oasis in Xinjiang has a large tract of sodic alkali soil and was hence selected as a study zone to explore relationships of halophyte coverage with soil alkalization indices (pH) exchangeable sodium percentage (ESP) , sodium adsorption ratio (SAR) , residual sodium carbonate (RSC) , total alkalinity (TA) ). It was found that in the soil of the study zone, existed large volumes of exchangeable sodium, strongly alkalizing the soil. Halophyte coverage was negatively related to all the soil alkalization indices to an extremely significant extent, especially to soil pH, being the highest (0. 810) , which was followed by ESP. Soil alkalization was the major factor affecting halophyte coverage, which could, therefore, be used as a good indicator of the former. Based on halophyte coverage as the major index in combination with some soil alkalizaiton indices, such as pH and ESP, alkalized soil in the study zone was classified. Soils 50% or so in hal- ophyte coverage, <8. 0 in pH, < 3% in ESP and < 3 in SAR were classified as non-alkaline soil, those 10%~40% in halophyte coverage, 8. 0 ~9. 5 in pH, 3%-35% in ESP and 3 ~ 40 in SAR as alkaline soil, and those < 10% in halo-phyte coverage, >9. 5 in pH, > 35% in ESP and >40 in SAR as Solonetz. Such classification not only broadens the look angle of the study on grading of alkalized soils, but also tallies with the local practical situation.关键词
盐(碱)生植被盖度/土壤碱化指标/土壤碱化分级Key words
Halophyte coverage/ Soil alkalization indices/ Classification of alkalized soils分类
农业科技引用本文复制引用
张芳,熊黑钢,安放舟,夏倩柔..基于盐(碱)生植被盖度的土壤碱化分级[J].土壤学报,2012,49(4):665-672,8.基金项目
国家自然科学基金项目(41171165)、北京市属高等学校人才强教计划(PHR200906125)、新疆大学博士启动项目(BS110124)资助 （41171165）
