鲁西北平原长期种植粮棉作物耕层土壤的微形态特征

摘要

The convention morphological and micro-morphological methods were used to study the effect of planting grain and cotton crops on soil property in Gaotang County,Shandong Province to provide the scientific basis for rationally improving the micro-structure of soil long-term planting crops.Results:Long-term planting grain and cotton crops has an obvious impact on soil micro-structure.The surface soil with 0～10 cm depth of planting wheat-maize field has higher organic matter content,uniform aggregate size,high separation and strong packing void connectivity,which forms the good micro-structure type for agricultural production.The soil matrix characteristics inherits soil parent materials mainly and the effect of crops cultivation on soil matrix is weak.The Fe nodules,Mn nodules and excrement are only observed due to less pedological features in the soil.%为合理改善长期种植农作物土壤的微结构提供依据,采用常规与微形态学方法研究山东省高唐县种植粮棉作物对土壤性质的影响.结果表明:粮棉作物长期种植对土壤微结构影响明显,其中,麦-玉地块0～10 cm土层有机质含量较高,团聚体大小均一、分离度高,堆集性孔隙连通性强,形成了有利于农业生产微结构类型;土壤基质特征主要继承自成土母质,作物种植影响很弱;土壤形成物数量很少,仅发现铁锰凝团、排泄物.