盐碱胁迫下海稻86土壤养分吸收特征及其对盐碱土壤“植物修复”效果

Characteristics of Soil Nutrient Uptake and Phytoremediation Effect of Ocean rice 86 under Saline and Alkaline Stress

采用盆栽试验方法,以黄华占为对照,以自然碱土及配制盐土为载体,研究种植海稻86前后土壤养分含量、pH值及土壤全盐含量变化特征。结果表明:盐胁迫下海稻86对速效磷吸收增加,速效钾吸收减少,对碱解氮和有机质的吸收无显著变化;碱胁迫下海稻86对碱解氮和速效磷吸收量增加,速效钾吸收量减少,有机质无显著变化。与黄华占相比,盐、碱胁迫下海稻86对土壤速效磷吸收量均更高,在本试验最高盐胁迫(土壤全盐含量为11.78 g/kg)下,海稻86对土壤速效磷吸收量较黄华占高57.11%。海稻86具有降盐碱的效果,与黄华占相比,海稻86未表现出显著降碱优势,在高盐度土壤中,海稻86降盐效果显著。

The pot experiment was used to study the changes of soil nutrient content,pH value and total salt content before and after planting Oceanrice 86 under salt and alkali stress with Huanghuazhan as control.The results showed that:Under salt stress,the absorption of available phosphorus of Oceanrice 86 increased and the available potassium inhibited significantly,but available nitrogen and organic matter utilization was not significant.However,Under alkali stress,the uptake of available nitrogen and available phosphorus of Oceanrice 86 increased compared with the control,while the available potassium decreased,organic matter showed no difference.Compared with Huanghuazhan,Oceanrice 86 showed stronger ability to absorb available phosphorus under salt and alkali stress,The absorption of available phosphor of Oceanrice 86 was 57.11%higher than that of Huanghuazhan under the most severe salt stress(total salt content of soil was 11.78 g/kg)in the experiment.The salinity of saline soil and alkalinity of alkaline soil can be reduced by Oceanrice 86.Compared with Huanghuazhan,the superiority of Oceanrice 86 in reducing soil alkalinity was not significant in the experimental alkaline soil,but significant on reduce soil salinity.