植物营养与肥料学报2011，Vol.17Issue(1)：103-109,7.
长期施用化肥对黄土丘陵区坡地土壤物理性质的影响
Effects of long-term chemical fertilization on soil physical properties of slope lands in the Loess Hilly Region
摘要
Abstract
Based on 17 years field experiments, the effects of long-term located application of chemical fertilizer on soil physical properties were studied in cultivated slope lands in the hilly Loess Plateau of China.The results indicate that: under the condition of long-term chemical fertilization, soil physical properties in the surface layer(0-15 cm) do not show a trend of degradation, and those in the middle layer( 15-30 cm)and lower layer( 30-45 cm) are improved in different degrees.The influence of chemical fertilizer on soil water-stable aggregate is stronger than that on soil density or soil porosity.Soil aggregate content and aggregate stability are improved in all the three soil layers, while the soil density and soil porosity are slightly degraded in the surface and lower soil layer, but are improved in the middle layer.The long-term different levels of single-applying fertilization have no significant effect on the soil physical properties, however, the interaction of combined applying of nitrogen and phosphor is obviously higher than that of the single-applying.The rank of the effects of chemical fertilizer on soil physical properties under different fertilizer treatments is combined applying ＞ single-nitrogen ＞ single-phosphor.The N2P1 is the optimal fertilizer treatment in improving soil properties as well as sustaining soil stability in the research region.关键词
黄土丘陵区/长期定位试验/化肥/坡耕地/土壤物理性质分类
农业科技引用本文复制引用
李强,许明祥,齐治军,王恒威..长期施用化肥对黄土丘陵区坡地土壤物理性质的影响[J].植物营养与肥料学报,2011,17(1):103-109,7.基金项目
国家重点基础研究发展规划项目(2007CB407205) （2007CB407205）
中科院知识创新重要方向项目(KZCX2-YW-443) （KZCX2-YW-443）
中科院"西部之光"人才培养计划项目资助. （）
