Root growth and calcium uptake in relation to calcium concentration
Root growth and calcium uptake in relation to calcium concentration
复制标题
根系生长和钙吸收与钙浓度的关系
作者：
J. Emanuelsson
本研究旨在探讨供钙对大麦根系生长的影响。植株生长在盆栽中，上半部分是沙子-珍珠岩混合物，下半部分是不同钙浓度(10−6-10−2 M CaCl2)的试验液。两部分之间被泥炭层隔开，泥炭层阻碍了钙从上到下的运输。通过计算总根数和有侧根的根数，每天观察根在试验介质中的生长。在所有钙浓度下，根数的发育均呈指数规律，且随钙浓度的增加而增加。收获时，根的大小(长度和干重)随钙浓度的降低而减小。
SummaryThe purpose of the present work has been to investigate the influence of calcium supply on root growth in barley. The plants were grown in pots, in which the upper part was a sand-perlite mixture and the lower part a test solution with varying calcium concentration (10−6–10−2 M CaCl2). The two parts were separated by a peat layer impeding a calcium transport from the upper to the lower part.The growth of the roots in the test media was examined daily by counting the total number of roots and the number of roots with laterals. The development of the number of roots had an exponential course at all calcium concentrations and was enhanced by increased calcium concentration. At harvest it was found that the size of the roots (length and dry weight) decreased with decreasing calcium concentration to a certain extent.