摘要
成渝地区是国家正式列为全国重点发展的四大经济区之一。通过对成渝经济区耕地主要土壤类型的质量状况进行分析,看出耕地的非农业占用、土壤肥力和土壤环境质量退化问题,呈现不同程度的严重态势,加强土壤保护已经刻不容缓。研究结果表明,成渝经济区的耕地土壤质量退化主要表现为"蚀、旱、板、酸、薄、生(熟化度低)和毒化(污染)",已成为成渝经济区农业发展的障碍。针对土壤质量主要的特点和问题,提出了扭转土壤利用结构性逆向变化等几点保障成渝经济区农业可持续发展的对策。
Cheng-Yu （Chengdu-Chongqing） economic area is officially recognized as one of the four national key developmental economic zones. Based on the analysis of the main types of soil quality status in Cheng-Yu economic area, the non agricultural occupation of cultivated soil, soil fertility and soil environmental quality degradation showed severe situation in different degrees and the soil protection was imperative. The results showed that the degradation of cultivated soil quality had become the obstacle to agricultural development and been mainly manifested as ＂erosion, drought, soil hardening, soil acidification, thin, low ripening degree and contamination＂. Based on the soil quality characteristics and degradation, the following soil protection countermeasures were brought forward ： the retortion of the reverse change of land use structure ; the implementations of cultivated soil protective tillage integrated technologies and the restoration of fallow system to prevent soil fertility degradation; the implementations of ＂three decrease and three increase＂ （to decrease chemical fertilizer, pesticide,plastic sheeting and to increase organic fertilizer, straw returning, green manure） to improve the soil environmental quality to guarantee the agricultural sustainable development in Cheng-Yu economic area.
出处
《地理科学》
CSCD
北大核心
2009年第3期375-380,共6页
Scientia Geographica Sinica
基金
中国科学院知识创新工程重要方向项目(KZCX2-YW-409)资助
关键词
成渝经济区
土壤肥力特点
土壤环境质量
土壤保护对策
Cheng-Yu economic area
soil fertility characteristics
soil environmental quality
soil protection countermeasures
