陆地棉对叶面施硼的吸收和分配

 通过水培试验结合室内分析，研究陆地棉对叶面施硼的吸收和分配。结果表明：施硼显著提高植株体内的硼含量和硼吸收量；棉花各器官硼含量及硼吸收量顺序均为叶片>茎秆>根系；与根系营养吸硼处理相比，叶面施硼后棉花的根系含硼量显著降低，其中部分叶片施硼处理的棉花根系硼含量降低了41.9%，全株叶片施硼的根系硼含量降低11.2%；部分叶片施硼后棉花茎秆硼含量比根系营养吸硼处理降低了5.9%，叶片硼含量比根系营养吸硼处理增加149.1%，硼主要停留在施硼叶片中，被转移到不施硼叶片的硼含量只占5.2%，难以通过输导组织进入其他叶片；全株叶片施硼，进入茎秆的硼素比根系营养吸硼处理增加22.5%，但进入叶片的硼素较根系营养吸硼增加203.7%。

Absorption and Distribution of Foliar Applied Boron in Upland Cotton

In this paper we studied the absorption and distribution of foliar applied boron in upland cotton(Gossypium hirsutum L.) in a hydroponic experiment. The results showed that both boron concentration and uptake in different cotton plant organs were the greatest in the leaves, followed by the stem, and lowest in the roots. boron absorption in the cotton plants increased significantly after foliar boron application except in roots. Compared with the control treatment, boron concentration in roots decreased by 41.9% when boron was partially applied on the leaves and by 11.2% when boron was applied to all leaves. Stalk boron concentration in the partial application treatment decreased by 5.9% compared to the control, but boron concentration in cotton leaves increased by 149.1%, significantly greater than the control treatment. In the partial application treatment, the amount of boron that was transferred to untreated leaves was only 5.2%, showing that boron absorbed by leaves can be partially transferred to conductivity organs but hardly enters other leaves. In the whole plant boron application treatment, the absorption of boron increased by 22.5% in the stalk and 203.7% in leaves.