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.
HE Yu-rong, XU Xiang-ming, WU Xiao-jun
. Soil Quality Characteristics and Protection Countermeasures of Cultivated Land in Chengdu-Chongqing Economic Zone[J]. SCIENTIA GEOGRAPHICA SINICA, 2009
, 29(3)
: 375
-380
.
DOI: 10.13249/j.cnki.sgs.2009.03.375
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