鲁西南夏玉米区土壤耕层情况调查研究

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。

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

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.