鲁西南夏玉米区土壤耕层情况调查研究

Investigation on Soil Plough Layer Condition in Maize-Growing Areas,Southwest of Shandong Province

[目的]为明确鲁西南地区土壤的耕层情况。[方法]对鲁西南玉米生产的5个主要县（市）（嘉祥县、微山县、兖州市、滕州市、郓城县）30个有代表性的地块，调查了耕层深度、有效土壤活土量和土壤容重。[结果]鲁西南夏玉米区3个县（市）耕层深度在15cm左右，2个县（市）深度在18～20cm，有效耕层活土量介于1．83×10^6～2．93×10^6kg／hm2，表层土壤容重介于1．37～1．49g/cm3。[结论]鲁西南部分地区的耕层结构已显著制约玉米生产，亟需改善。

[Objective I The research aimed to explicit the soil plough layer in southwest of Shandong Province. [ Method ] 30 representative samples were selected in 5 main counties （cities） （Jiaxiang County, Weishan County, Yanzhou City, Tengzbou City, Yuncheng County）. The depth of plough layer, living soil mass of effective soil and soil bulk density were investigated. [ Result ] The depth of plough layer of 3 summer maize production regions in southwest of Shandong Province was about 15 cm, and the depth of 2 counties（cities） was 18 -20 cm. Living soil mass of effective soil ranged from 1.83× 106 kg/hm2 to 2.93 × 106 kg/hm2 , and soil bulk density in surface layer ranged from 1.37 g/cm3 to 1.49 g/cm3. [ Conclusion] The structure of plough layer in some regions of southwest of Shandong Province had restricted obviously the maize production, which should be improved.