Meteorological Grading Indexes of Water–saving Irrigation for Corn

DOI

10.2991/jrarc.2013.3.2.4How to use a DOI?

Keywords

maize, water-saving irrigation, Meteorological index

Abstract

To optimize irrigation and provide a technical guide on agricultural production, the water-saving irrigation meteorological grading indexes of different development stages of maize were built in this paper, based on the principle of farmland water balance, the theories of insufficient irrigation and regulated deficit irrigation, and by using multidimensional information including day-by-day meteorological data in 1961-2008 from 500 meteorological stations, soil moisture data in ten-day periods in 1993-2008 from 239 agro-meteorological stations (of which, the data in 1980-2008 came from 68 agro-meteorological stations),irrigation amount and yield data were collected to analyze the relationship between the moisture deficiency rates, the quantity of water deficit and yield reduction rates at sowing-jointing stage, jointing-heading stage, heading-mature stage and the whole growth stage of maize referring to the product-water function(FAO-1979). Results indicated that water-saving irrigation meteorological grading indexes from I-III levels of moisture deficiency rate and the quantity of water deficit (secondary indicators) were [10%, 25%), [25%, 40%) and >40%, corresponding to 1-2 irrigations (600m3 hm–2 each time), 2-3 irrigations and >3 irrigations for the whole growth stage of maize, respectively. For sowing-jointing stage, the indicators were [15%, 30%), [30%, 45%) and >45%, corresponding to 0.5 irrigation, 1 irrigations and >1 irrigation, respectively. For jointing-heading stage, the indicators were [15%,30%), [30%, 45%) and >45%, corresponding to 0.5 irrigation, 1 irrigation and >1 irrigation, respectively. For heading-mature stage, the indicators were [15%, 30%), [30%, 50%) and >50%, corresponding to 1 irrigation, 1-2 irrigations and >2 irrigations, respectively. These indices could supply scientific support for the optimization of irrigation, and give guidance to agricultural production.

Copyright

© 2013, 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  - JOUR
AU  - Jingjing Xiao
AU  - Zhiguo Huo
AU  - Dapeng Huang
AU  - Fenfen Guo
AU  - Yan Jiang
AU  - Gaofeng Fan
AU  - E. Youhao
AU  - Y.U. Caixia
PY  - 2013
DA  - 2013/08/01
TI  - Meteorological Grading Indexes of Water–saving Irrigation for Corn
JO  - Journal of Risk Analysis and Crisis Response
SP  - 95
EP  - 102
VL  - 3
IS  - 2
SN  - 2210-8505
UR  - https://doi.org/10.2991/jrarc.2013.3.2.4
DO  - 10.2991/jrarc.2013.3.2.4
ID  - Xiao2013
ER  -