摘要
将近期采集的土壤样品各指标与第2次土壤普查结果进行了分析比对,在分析聊城市20年来集约经营投入变化的基础上,讨论了经营集约度对土壤质量的影响。选择施肥量、机械总动力、农药投入量等指标反映土地利用集约度的变化。结果表明:大量化肥的施用,提高了土壤的养分供给水平,提高了土壤质量级别,但速效钾含量降低、变异性加大,同时也导致化肥产出率逐年降低;机械化水平的不断提高,使土壤容重增加,孔隙度减小;管理措施不一致、农业结构调整等因素导致速效养分、有机质等土壤质量特征的区域性差异加大。
Through the recent soil samples analysis and comparison with the results of second soil survey, and based on the analysis of intensive farming changes in Liaocheng over the past 20 years, we discussed the effects of changes in intensity of land management on soil quality. The main results are as follows： The application of a large number of chemical fertilizer improved soil nutrient levels, while led to lower rate of fertilizer output year by year. Improve of mechanization level lead to the increasing of soil bulk density, porosity decreases; values of ph lower in some regions and the soil acidity. Management measures and the adjustment of agricultural structure and other factors lead to the regional differences of soil quality characteristics such as active-nutrients and organic material increasing.
出处
《河南农业科学》
CSCD
北大核心
2010年第1期50-54,共5页
Journal of Henan Agricultural Sciences
基金
山东省优秀中青年科学家科研奖励基金(2007BS08026)
关键词
土地经营
集约度
土壤质量
Land management
Intensive condiction
Soil quality
