Mowing Improves Chromium Phytoremediation in Leersia hexandra Swartz

To improve the efficiency of chromium (Cr) phytoextraction by Leersia hexandra Swartz, effects mowing on Cr accumulation in L. were investigated using hydroponic experiments. Mowing heights (0, 5, and 10 cm), interval (30, 60, 90 120 days), frequencies (1, 2, 3 times) optimized. at cm above roots significantly increased shoot biomass (32.9 g/pot). The days achieved highest (62.8 with thrice (67.0 g/pot) was higher than those one twice mowing, as well no (CK). increases might ascribe to changes endogenous hormone balance mowing. Proper contents Gibberellin (GA3), 6-Benzylaminopurine (6-BA), 6-Kinetin (6-KT), trans-Zeatin-riboside (TZR) leaves, 3-Indolepropionic acid (IPA) stems, but decreased Jasmonic (JA) leaves thereby enhancing regeneration plant. enhancement plant resulted accumulation. Compared CK, optimal method (10 cm, days, 91.4% 36.0%, respectively. These findings suggested that proper had application potential promote hexandra.