Analysis of irrigation water requirement characteristics for wheat-maize continuous cropping in the five counties of Hebei Province
- Article
- Figures
- Metrics
- Preview PDF
- Reference
- Related
- Cited by
- Materials
Abstract:
The data of five typical counties in Hebei Plain were collected to analyses the irrigation water requirement characteristics o f the wheat-maize continuous cropping system. Crop effective precipitation was calculated based on a modified SCS-CN model using precipitation, soil, crop conditions, among other factors. Crop water requirement was estimated by the Penman Monteith equation and crop coefficient method recommended by FAO . Besides, the spatial and temporal distribution characteristics of irrigation water requirements in different hydrological years were also analyzed. The results showed that the crop effective precipitation, water requirement and irrigation water requirement for the whole growing period of wheat-maize continuous cropping were 389, 736 and 347 mm, respectively, in the study area. T he ir rig atio n water requirement of wheat-maize continuouscropping in the wet , median, and dry water year was 321, 382 and 423 mm, respectively. The irrigation water requirement of winter wheat was 271-350 mm. The irrigation water requirement of the whole growth period was 26% , 26% and 29% respectively, in the period of turning green to jointing, jointing to heading and heading to maturity . The irrigation water requirement of summer maize was 0-49 mm accounting for 52% and 48% of the total fertility period, respectively. The spatial distribution of crop effective precipitation was decreased slowly from west to east in Shijiazhuang and increased gradually from west to east in Handan. T he water requirement in three counties of Shijiazhuang was slightly higher than those in two counties of Handan. The irrigation water requirement had a zonal distribution in the study area.
Keywords:
Project Supported:
Clc Number:
Mobile website
® 2024 All Rights Reserved
冀公网安备13010502002656号
冀公网安备13010502002656号