夏秋反季节莴苣的营养吸收规律初探

Primary Study on Nourishment Absorption Regulation of Lettuce Planted in Late Summer

对夏秋反季节莴苣营养吸收规律的试验结果表明，莴苣的生物量随莴苣的生长进程逐渐增加。移栽45d后干物质积累量占全生育期的80％以上；氨、磷、钾的吸收最高峰出现在移栽后的45～60d，吸收强度分别这22．47mg／株·d、8．01mg／株·d和35．61mg／株·d。

The results from two years＇ experiments indicate that the biomass of lettuce increases with its growth progress and the dry matter accumulation amount after transplanting 45 d accounts for over 80- in the whole growth period, the absorbing peak of N, P and K appears at 45-60 d after transplanting and the absorbing intensily is up to 22.4 mg/plant · d, 8.01mg/plat·d and 35.61 mg/plant·d respectively.