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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。
Based on black poplar-soybean, white-larch-soybean and red spruce-soybean agroforestry system and soya-bean pure agroforestry system in black soil region, the soil physical properties, organic matter, N, P and K The effects of different agroforestry models on soil physical properties and soil nutrient environment in black soil were compared and analyzed. The results showed that agroforestry ecosystem could significantly improve soil structure, increase soil nutrient content and increase soil organic matter and C / N in black soil. Among them, Populus simonii-Soybean had the best effect with soil moisture content up to 41.20%, total porosity and soil density were 60.60% and 1.02g / cm3, respectively, and CP / NCP was higher than pure soybean farmland, Improve the soil organic matter, hydrolyzed nitrogen and available phosphorus content of the most prominent; long white larch - soybean and red spruce - soybean model higher available potassium mass fraction.