不同生育期钾营养亏缺对番茄褐变型筋腐果发生的影响

Effects of Potassium Deficiency at Different Growth Stage on Brown Blotchy Ripen ing of Tomato

通过在番茄不同生育期进行少钾处理，研究了钾营养亏缺对番茄褐变型筋 腐果发生的影响。结果表明：任何一个时期钾营养亏缺都可使筋腐果发生率、综合筋腐果 指 数提高，产量降低，并且低钾的时期越长，影响越大。尤其是坐果至采收期间，钾亏缺的影 响显著提高。

The experiment results indicated that the brown blotch y ripening of tomato was closed related to the application of K element. Whichev er stage K deficiency，the incidence and integrated index of tomato brown blotch g ripening were increased. Moreover，the longer K deficiency period，the worse r esults were obtained. Especially at fruit setting to harvesting stage the e ffects of K deficiency increased significantly. In the growing period, K ferti lizer deficiency can affect the yield too.