摘要
以黑土区小黑杨—大豆、长白落叶松—大豆和红皮云杉—大豆农林复合系统及大豆纯农地土壤为对象,通过对土壤水分物理性质,有机质、N、P、K等指标的测定与分析,对比研究了不同农林复合模式对黑土区土壤物理性质与土壤养分环境的影响。结果表明:农林复合生态系统能够显著改善黑土区土壤结构,提高土壤养分质量分数,增加表层土壤的有机质和C/N。其中以小黑杨—大豆模式效果最好,土壤含水量可达41.20%,总孔隙度和土壤密度分别为60.60%、1.02g/cm3,CP/NCP高于大豆纯农地,且该模式在提高土壤有机质、水解氮及有效磷质量分数方面最为突出;长白落叶松—大豆和红皮云杉—大豆模式的速效钾质量分数较高。
An experiment was conducted to study the effects of different agroforestry systems,lesser black poplar-soybean,Korean larch-soybean and Korean spruce-soybean,on soil physical properties and nutrient recycling in terms of soil physical properties,organic matters,and contents of N,P,K,using soybean monoculture in the black soil region as the control. Result shows that agroforestry can significantly improve soil structure and enhance nutrient content in the soil; it can also increase organic matter and C/N in surface soil. Among these three systems,the effect of lesser black poplar-soybean system is most significant with soil moisture content of 41.20%,total porosity of 60.60%,and density of 1.02g/cm3; the ratio of non-capillary porosity to capillary porosity （CP/NCP） is higher than that of the control. Lesser black poplar-soybean system can also significantly improve contents of soil organic matter,hydrolyzed N and available P. The available K content in Korean larch-soybean and Korean spruce-soybean agroforestry systems is comparatively higher.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2010年第5期68-70,共3页
Journal of Northeast Forestry University
基金
国家林业科技支撑计划(2006BAD03A0502-01)
关键词
黑土区
农林复合
土壤水分
土壤养分
土壤效应
Black soil region
Agroforestry
Soil moisture
Soil nutrients
Soil effects
