Wafaa,H.Mohamed.; Nashwa,I.Abo El-Fadl ; M.A.Shama; N. A.A.E. El-Saied ( 2012). Response of Jerusalem artichoke to rate and placement methods of potassium humate under conditions of three different soilsEgypt. J. Soil Sci., 52, No. 4, pp. 481 – 497 (2012)
Abstract: The present study was carried out during two successive summer seasons of 2008 and 2009 at soil salinity lab. Alexandria, to evaluate the influence of three types of soil clay, calcareous and sandy soil, applied K-humate as foliar on the plant and soaking tubers before planting and K-humate levels at (0.0% as control, 0.05%, 0.10% and 0.15 %) ,as well as, their interactions on the vegetative growth, yield ,its components, and tuber quality attributes of Jerusalem artichoke crop. The results showed that, all growth characters except plant height, tuber yield and inulin content a significant response when Jerusalem artichoke grows on sandy soil followed by clay then calcareous soils. The contents of K% and P% in tubers were significantly higher when grow on clay soil, followed by the sandy soil and then the calcareous soil. K-humate levels affected most studied traits significantly. Generally, with increasing potassium humate concentration from 0.0% up to .15% most of the studied characters were increased positively. The results also indicated that tuber Cu, Mn and K% content seemed to be affected significantly with K- humate rates during both summer seasons. The same trend was reached by spraying K-humate application compared with soaking K- humate application. The required concentration of K-humate within the foliar spray should be 0.15 % under sandy soil condition to produce higher tuber production of good quality.
Keywords: (Potassium humate; Soaking; Foliar application; Jerusalem artichoke plants; inulin; Yield quality)
