北京林业大学学报Issue(5)：39-43,5.DOI:10.13332/j.cnki.jbfu.2014.05.008
黑土区不同林龄落叶松人工林土壤磷的吸附与解吸特性
Soil phosphorus sorption and desorption characteristics of larch plantations at different ages in black soil region
摘要
Abstract
Phosphorus ( P) adsorption and desorption characteristics of surface soil (0-10 cm) from 21-, 30-, 40- and 52-year-old larch plantations and undisturbed secondary forest were studied by analyzing their maximum adsorption amount (Qm), maximum buffer capacity (MBC) and desorption rate, and other related soil properties in typical black soil region. Results showed that the extent and rate of P adsorption of larch plantations’ soils were all higher than that of undisturbed secondary forest soil. Soil phosphorus Qm of larch plantations with different ages varied from 692. 24 to 759. 41 mg/kg. Soil phosphorus Qm, adsorption intensity factor ( K) and MBC of different larch plantations increased and then decreased with increasing stand age, and the values described above for 30-year-old were significantly the highest among four forests. The amount and rate of soil phosphorus desorption reduced firstly to the minimum at 30-year-old and then increased with increasing stand age to the maximum at 52-year-old larch plantation. Soil of larch plantation at 30-year-old had a strong phosphorus-fixation capacity;and 52-year-old larch plantation released easily phosphorus to soil, with the sorption and desorption capacity approaching to the levels of undisturbed black soil.关键词
黑土/落叶松人工林/磷/吸附/解吸Key words
black soil/larch plantations/phosphorus/adsorption/desorption分类
农业科技引用本文复制引用
杨小燕,杨淼焱,王恩姮,夏祥友,陈祥伟..黑土区不同林龄落叶松人工林土壤磷的吸附与解吸特性[J].北京林业大学学报,2014,(5):39-43,5.基金项目
国家自然科学基金项目(41271293)、大学生创新创业训练计划项目(201310225002)。 （41271293）
