利用钼值作为冬小麦缺钼土壤诊断指标的探讨

STUDY ON SOIL MOLYBDENUM VALUE AS A SOIL DIAGNOSIS STANDARD FOR WINTER WHEAT

摘要: 连续2年的盆栽试验结果说明，冬小麦产量随土壤有效钼含量或钼值提高而增加，当钼值大于8.0时，冬小麦籽粒产量大于最高产量的90％，冬小麦施钼增产不显著;结合多年以各地土壤进行的盆栽、田间试验结果说明，冬小麦施钼增产效果与土壤有效钼含量相关性不大，但冬小麦施钼增产率随土壤钼值提高而下降，钼值作为冬小麦土壤钼有效性指标能适用于不同土壤条件，拟定钼值8.0～8.5是冬小麦施钼的临界值。

Abstract: There was good relationship between winter wheat yield and molybdenum value in soil culture experimens, when the molybdenum value was up to 8. 0, the yleid of winter wheat was over 90 percent of the maximum yield. But the further increase of Mo value by adding more molybdenum fertilizer did not significantly increase yield. This result could be proved by field trials, the relationship between the increase rate of wheat yield and soil available Mo content was poor. however,wheat yield was increased significantiy by application molybdenum fertilizer when soil molybdenum value was below 8. 0 to 8. 5.