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在盆栽条件下,采用严重缺硼的灰紫色土为供试土壤,研究硼对棉花~(32)P、~(36)Rb和~(14)c的吸收及其在体内分布的影响。结果表明,~(32)P无论土施、涂叶或茎部浸泡,缺硼棉株各器官中~(32)P的含量均高于施硼棉株,而单株总吸收量则比施硼棉株少。~(32)P的根部吸收或叶部吸收,均不因施硼与否而影响其在体内的分布规律,但~(32)P浸泡茎部则干扰其在棉株中的正常分布。适量施硼增加棉株各器官中~(36)Rb的含量,并促进单株~(36)Rb的吸收,高硼使~(36)Rb吸收受到抑制,但对其在各器官中含量的影响无明显规律,不同硼水平对~(36)Rb在棉株各器官中的分布也无显著影响,施硼可提高棉叶中~(14)C光合产物,并促进这些产物向其它器官转移,苗期转移到根、茎以及蕾期转移到果枝的~(14)C光合产物均比缺硼棉株高。
Under potted condition, the purple soil with serious boron deficiency was used as tested soil to study the effect of boron on the uptake and distribution of ~ (32) P, ~ (36) Rb and ~ (14) c in cotton. The results showed that the content of ~ (32) P in various organs of boron-deficient cotton plants was higher than that of boron-applying cotton plants, regardless of soil application, leaf application or stem soaking, Borax less. The root absorption or foliar uptake of ~ (32) P did not affect its distribution in the body due to the application of boron, but the ~ (32) P soaking of the stem interfered with its normal distribution in the cotton. Appropriate amount of boron increased the content of ~ (36) Rb and promoted the absorption of ~ (36) Rb in various organs of cotton plants. The absorption of ~ (36) Rb was inhibited by high boron, but the contents of There was no obvious rule in the effect. Different boron levels had no significant effect on the distribution of ~ (36) Rb in various organs of cotton plants. Application of boron could increase ~ (14) C photosynthetic products in cotton leaves and promote the transfer of these products to other organs , The photosynthate of ~ (14) C translocated to the shoots at the seedling stage to the root, stem and buds were all higher than those of the boron-deficient cotton plants.