不同轮作方式下烟土供肥规律的研究

Study on the laws of nutrient-supply movements under different rotations of the tobacco field

采取小区试验方法,通过设置烤烟-休闲、烤烟-小麦轮作、烤烟-油菜轮作和烤烟-黑麦草轮作4种处理分析不同轮作方式下碱解氮、铵态氮、速效钾、有效磷的供应规律。结果表明:烤烟休闲轮作区的养分的供应规律要劣于其他处理;小麦、黑麦草烤烟轮作处理优于其他轮作处理,土壤的释放养分效率与烟株需肥规律相一致,为贵州地区筛选出合理的轮作方式提供了理论参考。

By using cell test method, four treatments including applying flue-cured tobacco - leisure, wheat rotation, rape rotation and ryegrass rotation were set up to analyze the law of Nutrient-supply movements of nitrogen, ammonium nitrogen, available phosphorus and potassium nutrient under different rotations of soil. The results showed that the law of Nutrient-supply movements of flue-cured tobacco - leisure to be inferior to other treatments,but the wheat and ryegrass rotation is slightly better than others. The Laws of soil release nutrient efficiency and tobacco plants need fertilizer is consistent in wheat and ryegrass rotation. It provides a theoretical of screened reasonable rotations reference for the Guizhou region.