摘要
以玫瑰(Rosa Rugosa)实生苗为试材,在砂培条件下研究氮磷钾营养亏缺对玫瑰幼苗根系总长度、表面积、体积、根尖数、分枝角度、分形维数等根构型参数与根系活力的影响。研究结果表明:氮磷钾营养亏缺条件下,玫瑰幼苗细根数量占总根量的比例降低;侧根密度增大;根系直径变大;分枝角度整体增大,根系趋向水平分布;根系活力显著下降,比对照分别下降19.08%、29.96%和55.59%;根系分形维数减小;其中缺氮或缺磷处理后,玫瑰幼苗侧根数量和长度、根系总长度、表面积、根系体积明显增大,缺钾与之相反,比对照分别下降了8.70%、53.95%、47.75%、55.91%和47.50%;缺钾比缺氮、缺磷处理的根系活力和分形维数下降得更多。因此,氮磷钾营养亏缺与玫瑰根构型的构建有很大的关联,玫瑰因氮磷钾营养亏缺而形成不同的根构型,这有利于根系对营养元素的吸收利用,促进玫瑰生长。
The sand culture system was used to research the effect of N,P,K deficiency on the parameters of root architecture and activity of Rosa Rugosa young seedlings.The results showed that proportion of tiny root decreased,the density,diameter of root increased significantly,and the branches angles enlarged,and the roots tended to horizontal distribution,root activity obviously declined 19.08%,29.96% and 55.59% than that of control respectively,and the root fractal dimension diminished significantly under N,P,K deficiency condition.Under N,P deficiency condition,the length and number of lateral root,the total length,surface area and volume of root increased significantly.In contrast,under K deficiency condition,which were 8.70%,53.95%,47.75%,55.91% and 47.50% less than those of control respectively.The root activity and fractal dimension under K deficiency condition was less than under N,P deficiency.There was great correlation between N,P,K deficiency and root architecture contruction.The different types of root architecture had been formed because N,P,K deficiency.It was conducive to the nutrient absorption,and promoting growth of Rosa Rugosa.
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2013年第3期43-48,共6页
Soil and Fertilizer Sciences in China
基金
山东省良种产业化资助项目"玫瑰种质资源收集
研究与创新利用"[鲁科字(2002)228号]
关键词
玫瑰
营养亏缺
根构型
分形维数
Rosa Rugosa
N, P, K-deficiency
root architecture
fractal dimension
