Water and nitrogen interactively increased the biomass production of Jerusalem artichoke (Helianthus tuberosus L.) in semi-arid area

  • K Gao
  • T Zhu
  • G Han
Keywords: Helianthus tuberosus L., yield, height, irrigation, nitrogen addition.

Abstract

The response of height, aboveground and underground biomass of Jerusalem artichoke (Helianthus tuberosus L.) to water and nitrogen fertilization were studied in north-eastern Inner Mongolia, China. The results showed that water was a main limiting factor on the height and yield of Jerusalem artichoke; it significantly improved the height and yield of Jerusalem artichoke (including leaf, stem, root and tuber yields) (p<0.01). Nitrogen fertilizer significantly influence height and yield during irrigation and achieved higher yield during addition of nitrogen (25-50 kg ha-1) (p<0.01). On the contrary, it was not significantly influenced without irrigation. By analyzing the correlation among tuber, leaf, stem and root, stem-leaf ratio, root-tuber ratio and root-shoot ratio under different condition (including irrigation and no irrigation), leaf size showed significant positive correlation with stem size and negative correlation with root-shoot ratio and root-shoot ration in two different conditions; during irrigation, leaf size indicated significant positive correlation with tuber size and the positive correlation between leaf and root size was not significant (p<0.01); without irrigation condition showed significant positive correlation between leaf and root size and the positive correlation between leaf and tuber size was not significant (p<0.01).

Key words: Helianthus tuberosus L., yield, height, irrigation, nitrogen addition.

Published
2013-09-26
Section
Articles

Journal Identifiers


eISSN: 1684-5315