山东省高产井灌区土壤机械深松探索与实践

为探索适合山东省高产井灌区的最佳深松深度和深松周期，在具有代表性的济南市章丘区，选用山东省普遍使用的1S-250型全方位倒梯形（铲）式深松机进行25、30和35 cm深松免耕播种作业对比，分析其土壤容重、土壤养分、小麦玉米产量、深松作业成本和单位面积新增经济效益等数据。试验结果表明，在含水量适中、壤性土质的高产井灌区，深松30 cm为最佳深松深度，2~3年深松1次无法满足农业生产需要，建议采用周期组合耕作模式。 

Exploration and Practice of Soil Mechanical Subsoiling in High Yield Well Irrigation Area in Shandong Province

To explore the best depth and period of subsoiling suitable for high yield well irrigation area in Shandong province，in the representative Zhangqiu district of Jinan city，1S-250 type omni-directional inverted trapezoid（shovel）deep subsoiling machinery was selected to carry out the comparison of no till sowing operations with depth of 25，30 and 35 cm，respectively.Data of soil bulk density，soil nutrient，yield of wheat and maize，cost of subsoiling operation and new economic benefit per unit area were analyzed.Results showed that in the high yield well irrigation area with moderate water content and loamy soil，the best depth of subsoiling was 30 cm.Deep subsoiling once every 2-3 years could not meet the needs.Thus，it was suggested to adopt periodic combination cultivation mode.