摘要
研究了渭北黄土高原侧柏、刺槐人工纯林及其混交林对土壤的培肥效应。结果表明:在黄土高原地区,种植人工林后能增强土壤腐殖化作用,促进土壤有机质的形成发育,对土壤的有机质、全氮、全磷、及碱解氮、速效钾等营养元素含量提高有很大帮助。不同林型植被,土壤的腐殖化作用有明显差异,土壤有机质、各营养元素和阳离子交换量增加不同,除全钾、速效磷以外,表现为刺槐侧柏混交林>刺槐>侧柏>荒地。固氮树种与非固氮树种混交栽植对土壤肥力质量的提高较纯林栽植效果显著。因此在退耕还林时,避免营造单一树种纯林,应该以固氮树种为主,合理搭配非固氮树种,混交栽植。
The improving effects of Platycladus orientalis, Robinia pseudoacacia and the two mixed plantations on soil fertility on the Loess Plateau were investigated. In the Loess Plateau area, planting plantation had much help for the improvement of the nutritional element content, such as soil organic matter, total nitrogen, total phosphorus, available nitrogen and quick-acting potassium, and different plantations had different enhancement degrees. Except total potassium and quick-acting phosphorus, every target in nitrogen fixation plantation was higher than that in non-nitrogen fixation plantation. In general, the enhancement of soil fertility in nitrogen fixation plantation is more remarkable than that in non-nitrogen fixation plantation.
出处
《水土保持通报》
CSCD
北大核心
2006年第3期26-28,62,共4页
Bulletin of Soil and Water Conservation
基金
教育部重点科技项目(03157)
国家自然科学基金项目(30170790)
国家科技攻关项目(2001BA510B01)
关键词
黄土高原
人工纯林
混交林
土壤肥力
培肥效应
Loess Plateau
pure plantation
mixed plantation
soil fertility
improvement effect to soil fertility
