【摘要】 为探明不同水分供应条件下苹果幼树锰素营养状况,设置不同施锰量和土壤水分管理的盆栽试验,研究水分胁迫对苹果幼树生长和锰积累的影响。结果表明:随着土壤田间持水量增加,苹果幼树干物质积累量升高。水分间歇饱和、中度干旱胁迫未施锰处理苹果幼树干物质积累量分别比施锰处理提高36.4%和28.7%,差异显著(P<0.05)。随着土壤田间持水量的降低,树体锰积累增加,较高土壤水分的条件下,施锰对树体锰的积累不明显,而中度干旱胁迫、干旱胁迫处理施锰后树体锰的积累分别较未施锰的树体提高39.5%和35.7%,差异显著(P<0.05)。施锰处理土壤锰含量高于未施锰处理,其中干旱胁迫处理土壤有效锰、交换性锰、易还原锰含量均较高,其次是水分间歇饱和处理。更多还原

【Abstract】 A pot experiment with two manganese rates(0mg kg,Mn0;400mg kg,Mn400) and four conditions of soil water(water saturation,WS;common water content,CW;moderate drought,MD;severe drought,SD) was designed to study the effect of water stress on growth and manganese accumulation of young apple tree.The results showed that dry matter accumulation of young apple tree increased with soil water content.Dry matter accumulation of WS+Mn0 and MD+Mn0 increased 36.4% and 28.7% respectively compared with WS+Mn400 and MD+Mn400(P<0.05).There was no difference of Mn accumulation in plant between Mn400 and Mn0 treatments at higher soil water content.But MD+Mn400 and SD+Mn400 increased 39.5% and 35.7% respectively compared with WS+Mn0 and MD+Mn0(P<0.05).Application of manganese increased soil manganese content,and the contents of soil available manganese,exchangeable manganese and reducible manganese of SD+Mn400 were the highest.更多还原