Evaluating Responses of Crop Water Use, Soil Water Storage and Infiltration to Precipitation Using Insentek Probes

DOI

10.2991/mmsa-18.2018.78How to use a DOI?

Keywords

insentek; precipitation; crop water requirement; lysimetry; zea mays L

Abstract

Precipitation has been shown to increase soil water storage (SWS) and soil infiltration depth (SID) while significantly restrain crop water use (i.e., crop evapotraspiration, ETc) during rainy days. However, the reducing effects on ETc and increasing effects on SWS and SID has not been well quantified due to a lack of automatic soil moisture measurement. Insentek probe is a newly developed soil moisture monitoring equipment that achieves automatic measurement of soil moisture. This enables the calculation of SWS and SID related to precipitation. Four Insentek probes were installed in four corresponding lysimeters to monitor SWS, SID and ETc for maize plants during rainy days at Xuchang Irrigation Experiment Station, in 2015 and 2016. Both lysimeter and Insentek ETc was related to precipitation in a power function. The reducing effect of precipitation on Insentek ETc was greater compared with lysimeter ETc. The relationships between SWS increment and precipitation, and between SID and precipitation were fitted to a positively linear function. The linearity indicated that per 10mm precipitation averagely increased SID by 17.9 cm and SWS by 7.3 mm, respectively. We conclude that precipitation is an independent factor that determines ETc of maize on rainy days despite of current soil moisture status in semi??"humid climate in the North China Plain.

Copyright

© 2018, 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  - Anzhen Qin
AU  - Dongfeng Ning
AU  - Zhandong Liu
AU  - Bin Sun
AU  - Ben Zhao
AU  - Junfu Xiao
AU  - Zugui Liu
PY  - 2018/03
DA  - 2018/03
TI  - Evaluating Responses of Crop Water Use, Soil Water Storage and Infiltration to Precipitation Using Insentek Probes
BT  - Proceedings of the 2018 International Conference on Mathematics, Modelling, Simulation and Algorithms (MMSA 2018)
PB  - Atlantis Press
SP  - 353
EP  - 356
SN  - 1951-6851
UR  - https://doi.org/10.2991/mmsa-18.2018.78
DO  - 10.2991/mmsa-18.2018.78
ID  - Qin2018/03
ER  -