多效唑对小麦的形态和生理效应

本文初步研究了多效唑对小麦的形态和生理效应及大田应用技术。多效唑有抑制小麦胚芽鞘、地中茎和株高的效应,并可增加单株分蘖和提高分蘖成穗率,有利于培育壮苗、壮株和防止倒伏。多效唑可提高小麦植株的生理活性,使茎叶含氮量和叶绿素含量增加,这种生理优势可一直维持到成熟。浸种和根施的适宜浓度为50～100PPm;叶面喷洒浓度以100-200PPm为宜;浓度过高,抑制过甚,对生长不利。

THE EFFECTS OF MULTIPLE-EFFECT TRIAZOLE(MET) ON MORPHOLOGICAL AND PHYSIOLOGICAL PROPERTIES OF WHEAT

The morphological and physiological effects and the field applicationtechnics of multiple-effect triazole(MET) on wheat were preliminarilystudied. MET could retard the elongation of coleoptile and rhizome, dec-rease plant heights,and increase the number of tillers per plant and thenumber of panicles per unit area,so that MET was beneficial to raisingstrong seedlings, improving plant type,preventing plants from lodging, im-proving panicle properties, and increasing grain number per panicle,if appliedin the range of proper concentration. Also, MET Application could increasethe physiological activities of wheat plants: for example nitrogen and chl-orophyll contents in wheat leaves increase,and these physiological super-iorities could maintain until maturity.The optimum concentration of METapplied were 50-100 ppm for seed-soaking or root application, and 100-200ppm for foliar spraying at pre-elongation stage or heading stage.Excessiveconcentration was unfavourable to wheat growth because of undue retarda-tion.It can be concluded, according to the results, that MET is one of thegrowth regulators possessing favourable regulating effects to wheat.