Effects of Exogenous Brassinolide Application at the Silking Stage on Nutrient Accumulation, Translocation and Remobilization of Waxy Maize under Post-Silking Heat Stress

Exogenous brassinolide (BR) application is a feasible measure to alleviate abiotic stresses on crop productivity. The effects of BR at the silking-stage accumulation, translocation, and remobilization dry matter (DM) nutrients (nitrogen, phosphorus, potassium) waxy maize exposed post-silking high temperature (HT) were studied using Jingkenuo2000 (JKN2000, heat-tolerant) Yunuo7 (YN7, heat-sensitive) as materials. mitigated penalty HT grain yield. reduced accumulation increased translocation pre-silking DM in YN7. In JKN2000, unaffected by HT. contribution rate yield JKN2000 Under HT, application, whereas nitrogen, potassium response dependent hybrids. harvest index different between two conclusion, relieved negative mainly caused alleviation was more obvious heat-tolerant hybrid.