薏苡耐盐性研究

Study on Salt Tolerance of Coix Lacroyma-JobiL.

目前我国有大面积的滨海盐化土壤尚未得到开发利用。薏苡是一种多用途植物,为了综合开发利用这一植物资源,我们对薏苡的耐盐性进行了初步研究,以明确薏苡在盐化土壤上种植的可能性。通过室内试验,测定了薏苡种子萌发期、出苗期和中后期的耐盐性;并利用盐池微区试验和田间小区试验,通过籽粒产量和秸秆产量2个指标,鉴定和验证了薏苡在不同程度盐化土壤上的适应性。结果表明:薏苡种子正常萌发的盐溶液浓度为7个大气压以下;在以氯离子为主的滨海盐化潮土上,薏苡正常出苗的土壤盐渍度为0.20%以下;苗期以后能够正常生长发育的土壤盐渍度为0.30%以下。薏苡可以在滨海轻度盐渍土壤上栽培或在中度盐渍土壤上进行保护性栽培。

At present a large area of coastal salinized soil in China was not developed and utilized.Coix lacroyma-jobi L.was a multipurposal plant.In order to exploit and utilize comprehensively this resource,the salt tolerance was studied.The salt tolerance was determined at the germination stage,the seedling emergence stage and the middle-late period through laboratory experiments,and the grain yield and the straw yield were determined through saltpond micro-plot experiment and the field plot experiment.The results showed that the salt solution concentration for the normal seed germination was below 7 atmosphere pressure.The soil salinity for the normal seedling emergence was less than 0.20% and for the normal growth and development was less than 0.30% on the coastal salined flavo-aquic soil mainly with chloride ion.It was determined that C.lacroyma-jobi L.could be planted on the mild coastal salinized soil or planted protectively on the moderate salinized soil.