不同种植年限黄蜀葵根际土养分变化规律

Status and changes of soil nutrients in rhizosphere of Abelmoschus manihot different planting age

采用土壤农化分析方法结合ICP-AES测定不同种植年限黄蜀葵根际土中的矿质营养元素含量,对比结果显示:随着种植年限的增加,黄蜀葵根际土中常量元素氮、磷及有机质含量逐年下降,土壤酸化;重金属有害元素含量未超过国家农业用地标准,但黄蜀葵根际土中汞元素含量逐年降低。根际土中微量元素锰、锌的含量也逐年降低,而中量元素镁、钠的含量呈上升趋势。其他元素营养成分无规则变化规律或无变化。因此,探究黄蜀葵不同种植年限根际土养分变化规律,为黄蜀葵栽培种植合理使用化学肥料、有机肥和微肥提供理论依据,并为消减黄蜀葵连作障碍提供指导。

Using soil chemical analysis method and combining with ICP-AES determination of mineral nutrition element content in rhizosphere soil of different planting age Abelmoschus Corolla. Results show that along with the increase of planting age, the nitrogen （total N） , available P and organic matter in rhizosphere soil of Abelmoschus Corolla content declined year by year and the soil got acidification. Heavy metal element content in agricultural land does not exceed national standards, but the content of element mercury （Hg） in rhizosphere soil of different planting age Abelmoschus Corolla declined. Request of microelement such as manganese（Mn） and zinc （Zn） had a increase tendency, but the content of magnesium （Mg） and sodium （Na） increased, and other nutrient elements had no changed rules or unchanged apparently. Consequently, exploring the change rules of different planting age Abelmoschus Corolla soil in rhizosphere as theoretical guidance of rational fertilization and subducting continuous cropping obstscles.