盐碱胁迫对俄罗斯黄花草木樨生长的影响

摘要

In order to explore the influence of salinity-alkalinity stress on Melilotus officinalis and the effect of trace elements to the resistance of M. officinalis,the saline soil improvement experiment and the trace elements spraying experiment were studied. The results showed that M. officinalis was under salinity stress when it grew in pH 8.5~9.5 and occurred a series of plants ecological variation phenomenon like low germination rate,plant small,sluggish growth,flowering shortened,reluctant ripen and few pods,premature aging,et al. It indicated that the suitable soil pH to M. officinalis was 8.0~8.5,and not more than 9.0. M. officinalis lacks of various trace elements under salinity stress which restrained its growth and reproduction. By spray-ing P-K fertilizer and B fertilizer,M. officinalis grass yield increased by 27.59% and 27.21%,respectively. By spraying Mn fertilizer and Mo fertilizer,seed yield increased by 85.45% and 58.10%,respectively.%为探究盐碱胁迫对俄罗斯黄花草木樨(Melilotus officinalis)生长的影响和微量元素增强对黄花草木樨抗逆性的作用,进行盐碱土改良试验和微量元素喷洒试验.结果表明,生长于pH为8.5~9.5的盐碱土中的黄花草木樨受盐碱胁迫的危害十分严重,出现发芽率低、植株矮小、生长滞缓、花期缩短、荚少子小、老化早衰等一系列的生态变异现象.种植黄花草木樨的土壤pH以8.0~8.5为宜,最高不宜超过9.0.在碱胁迫下黄花草木樨往往缺乏多种微量元素,从而制约其生长繁殖.通过喷洒P-K肥和B肥,牧草分别增产27.59%和27.21%,喷洒Mn肥和Mo肥,种子分别增产85.45%和58.10%.