不同光质下青甘韭粗纤维含量及5种中微量元素吸收特性的差异分析

Differential analysis of crude fiber content and absorption characteristics of fivemediumand trace elements of Allium przewalskianum Regelunder different light quality

为明确不同光质下青甘韭对中微量元素的需求特性及粗纤维含量变化规律,对6月龄青甘韭苗移栽于有外源施加中微量元素的基质中,以红光(R)、蓝光(B)、红蓝光1:1(R1B1)、红蓝光13:2(R13B2)、白光(W)、日光(CK)进行6个月的不同光质处理。结果表明,与自然光相比较,红光对青甘韭地下茎和叶中的Fe、Zn、Ca、Se吸收具有显著促进作用。蓝光和白光对Fe、B、Zn、Ca和Se吸收在地下茎和叶中有不同程度的抑制作用。两种红蓝配比光对地下茎的B、Zn、Se吸收有不同程度促进作用,对叶的Fe、B、Zn吸收有明显促进作用。蓝光和白光均能促进粗纤维含量的增加,两种红蓝配比光能降低粗纤维含量,红光能降低地下茎的粗纤维含量,但能提高叶的粗纤维含量。综合来看,光质能影响青甘韭对Fe、B、Zn、Ca和Se五种中微量元素的吸收、分配以及粗纤维含量,栽培上可通过调控光质改变其地下茎和叶中的中微量元素及粗纤维含量。

To clarify the demand characteristics of medium and trace elements and the variation of crude fiber(CF)content of Allium przewalskianum Regel under different light quality,6-month-old seedlings were transplanted in a substrate with exogenous application of medium and trace elements,treated with red light(R),blue light(B),red blue light 1:1(R1B1),red blue light 13:2(R13B2),white light(W),and sunlight(CK)for 6 months.The results showed that compared with natural light(CK),red light had a significant effect on the uptake of Fe,Zn,Ca and Se in the un-derground stems and leaves of A.przewalskianum.Blue light and white light inhibited Fe,B,Zn,Ca,and Se absorp-tion in underground stems and leaves.The red-blue ratio light promoted the absorption of B,Zn,and Se in under-ground stems to different degrees,and significantly promoted the absorption of Fe,B,and Zn in leaves.Both blue light and white light could promote the increase of CF content.The red-blue ratio light could reduce CF content,while red light could reduce the Cfcontent of underground stems,but could increase the CF content of leaves.In sum-mary,light quality could affect the absorption and distribution of the five medium and trace elements,Fe,B,Zn,Ca,and Se,as well as the CF content of A.przewalskianum.In course of cultivation,the content of medium and trace ele-ments and CF in its underground stems and leaves could be changed by adjusting light quality.