Water requirement regulation and irrigation forecast of corn in western Liaoning

doi:10.7523/j.issn.2095-6134.2010.5.006

Abstract

Abstract:

The corn water requirement and irrigation forecast in semi-arid area in western Liaoning were studied by using CROPWAT model, based on corn growth parameters and agro-meteorological data from 2004 to 2008. The results indicate that the trend of corn water requirement was in a normal distribution in the growth period and the annual water demand was between 572 and 645mm. The water requirements in the seedling, jointing, tasselling, and filling stages were 11.1%, 30.2%, 19.8% and 38.9% of the total water requirement, respectively. The corn irrigation requirement curves were of the parabolic type, the medium-term platform type, and double-peak type. The supplementary irrigation was fulfilled mainly in July, August and September.

Key words: corn, water requirement regulation, irrigation forecast, CROPWAT

CLC Number:

S271

KANG Zhen-Jun, YIN Guang-Hua, LIU Zuo-Xin, ZHANG Fa-Sheng, TONG Na, GU Jian. Water requirement regulation and irrigation forecast of corn in western Liaoning[J]. , 2010, 27(5): 614-620.

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