石灰性土壤上花生缺铁黄化与土壤水分和重碳酸盐的关系

Effects of Soil Moisture and Bicarbonate on Iron Chlorosis of Peanut Grown on Calcareous Soil

通过盆栽试验探讨了石灰性土壤上土壤含水量变化对花生铁营养状况的影响.结果表明,水分过多造成石灰性土壤上花生根际pH和重碳酸盐含量的增加是诱导花生缺铁黄化的重要原因.所以控制土壤含水量能有效地防止石灰性土壤上花生缺铁黄化症状的发生.

Pot experiment showed that pH and HCO3 in rhizosphere of peanut grown on calcareous were higher than that in bulk soil through all growing stage under high soil moisture condition, especially in the late growing stage, HCO^ was higher both in rhizosphere soil and bulk soil as compared to low soil moisture condition. It is suggested that iron chlorosis of peanut grown on calcareous soil could be prevented by controlling soil water content.