辽宁省水稻土壤养分丰缺指标建立初探

Discussion on the Establishment of Nutrient Plentiful-Lack index on Paddy Soil in Liaoning Province

根据"3414"试验结果,初步建立了辽宁省水稻土养分丰缺指标。水稻相对产量与土壤碱解氮、速效P、速效K含量进行方程拟合,以相对产量50%、50%～65%、65%～75%、75%～85%和大于85%为标准,得出土壤肥力等级为极低、低、中、高、较高对应的土壤碱解氮含量为小于58mgkg-1、58～120mgkg-1、120～196mgkg-1、196～318mgkg-1、大于318mgkg-1;以相对产量80%、80%～85%、85%～90%和大于95%为标准,得出土壤肥力等级为极低、低、中、高、较高对应的土壤速效P含量为小于7mgkg-1、7～9mgkg-1、9～12mgkg-1、12～15mgkg-1、大于15mgkg-1;对应的土壤速效K含量为小于6mgkg-1、6～20mgkg-1、20～63mgkg-1、63～205mgkg-1、大于205mgkg-1。

Rice is the second large crop in Liaoning Province. The establishment of index system for paddy soil testing and fertilizer recommendation is of great significance to guide the scientific fertilization of Liaoning farmers and the production of formulated fertilizer by enterprises. In 2007 ,The ＂3414＂ tests for fertilizers were carried on soils in the whole Liaoning Province, and the rich-lack indices of nutrients in paddy soils was established.