外施不同形态硼对棉花吸收利用硼及其他矿质元素的影响

Effects of different forms of boron on absorption and utilization of boron and other mineral elements in cotton

【目的】研究外施不同形态硼对棉花吸收利用硼及其他矿质元素的影响。【方法】采用土培方法,以中棉所83为试验材料,设置空白对照、无机硼酸(硼酸)、有机硼(硼酸二甘油酯)3个处理,施硼量均为1.00 mg·kg^(-1),棉花生长65 d后取样并测定相关指标。【结果】施用无机硼酸和有机硼均促进了棉花细胞壁和叶绿体的发育,增加了棉花叶、茎和根部及其细胞壁的硼含量,同时促进了棉花对磷和镁的吸收,但减少了棉花对钙的吸收,使单株生物量分别增加15.09%和22.49%。相比无机硼酸,有机硼处理对棉花叶和茎硼含量的增加效果更显著,增幅分别为16.88%和10.72%,且增加的主要为移动性高的自由态硼或原生质体硼。【结论】有机硼较无机硼酸更有利于植物对硼的吸收利用。

[Objective]The purpose of this study was to investigate the effects of different forms of boron on the absorption and utilization of boron and other minerals.[Methods]Using the potted soil culture method,CCRI 83 as the experimental material three treatments were set up:control(CK),inorganic boric acid(B),organic boron(OB),and the boron application amount was 1 mg·kg^(-1).Cotton was sampled at 65 days after growth and related indicators were determined.[Results]The application of B and OB promoted the development of cotton cell wall and chloroplast,increased the boron contents in the leaves,stems,roots,and cell wall,and promoted the absorption of phosphorus and magnesium,but reduced the absorption of calcium by cotton,and increased the biomass per plant by 15.09%and 22.49%,in comparison with CK,respectively.Compared with B treatment,OB treatment has a more significant effect on increasing boron content(mainly free or protoplasmic boron with high mobility)in cotton leaves and stems,increasing by 16.88%and 10.72%,respectively.[Conclusion]Organic boron was more conducive to the absorption and utilization of boron by plants than inorganic boric acid.