Effects of water deficit in different growth stages and N fertilizer levels on maize growth and water use efficiency in Northwest China

DOI

10.2991/emcpe-16.2016.10How to use a DOI?

Keywords

Maize; water deficit; nitrogen; water use efficiency

Abstract

Soil water and nutrients are key factors for plant growth and development as they are involved in many processes in plants. The purpose of this study was to investigate the effect of water deficit in different growth stages on maize growth and water use efficiency. Randomized block design with three replications and the treatments consisted of three levels of irrigation and three levels of N fertilizer were used. Three irrigation levels were W1 (water deficit at seedling stage), W2 (water deficit at jointing stage), W3 (water deficit at filling stage) and nitrogen (N) fertilizer levels were F1 (0.1 g pure N kg-1 soil), F2 (0.2 g pure N kg-1 soil) and F3 (0.3 g pure N kg-1 soil). The control treatment was composed of full irrigation and without N fertilizer application (CK). The results indicated that the interactions between irrigation and N fertilizer were important for shoot dry matter and root dry matter. The ranking of N fertilizer treatments, from high to low accumulations of root and stem-leaf dry matter averages, was F1>F3>F2. The falling of accumulation of nitrate in plants was mainly attributed to the proper enhancing ammonium reduced the adsorptive capacity of nitrate. Water deficit at different growth stages were significantly increase the total N content of stem-leaf. In conclusion, the maize can repair itself so they stop growing when water deficit at seedling stage, but do not die. They simply resume growth later when the water supply is plenty.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xiukang Wang
PY  - 2016/08
DA  - 2016/08
TI  - Effects of water deficit in different growth stages and N fertilizer levels on maize growth and water use efficiency in Northwest China
BT  - Proceedings of the 2016 5th International Conference on Environment, Materials, Chemistry and Power Electronics
PB  - Atlantis Press
SP  - 43
EP  - 46
SN  - 2352-5401
UR  - https://doi.org/10.2991/emcpe-16.2016.10
DO  - 10.2991/emcpe-16.2016.10
ID  - Wang2016/08
ER  -