| Cite this article: | 丁大伟,陈金平,申孝军,等.商丘地区不同降水年型冬小麦-夏玉米需水量和缺水量分析[J].灌溉排水学报,0,():-. |
| DING Dawei,CHEN Jinping,SHEN Xiaojun,et al.商丘地区不同降水年型冬小麦-夏玉米需水量和缺水量分析[J].灌溉排水学报,0,():-. |
|
| |
|
|
| This article has been：Browse 794Times Download 0Times |
|
|
|
| DOI： |
|
| Analysis of Crop Water Requirement and Crop Water Deficit of Winter Wheat and Summer Maize under Different Precipitation Years in Shangqiu |
|
DING Dawei1,2,3, CHEN Jinping1,2, SHEN Xiaojun2,4, SONG Ni1,2, XIE Kun1,2, REN Wen1,2, WANG Jinglei1,2
|
|
1. Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang, 453002, China;2. National Agro-ecological System Observation and Research Station of Shangqiu/ National Agricultural Experimental Station for Agricultural Environment, Shangqiu/ National Long-term Agricultural Green Development Experiment and Observation Station, Shangqiu 476000, China;3.4. Graduate School of Chinese Academy of Agricultural Sciences, Beijing 100081, China;4.3. College of Water Conservancy Engineering, Tianjin Agricultural University, Tianjin 300392, China
|
| Abstract: |
| 【Objective】In order to explore the crop water requirement of winter wheat and summer maize under different precipitation years and analyze the relationship between the change trend and meteorological factors, this study will provide support for improving agricultural water use efficiency and formulating a scientific irrigation schedule in wheat-maize double cropping areas.【Method】 Based on meteorological data from 1954 to 2019 in Shangqiu City, crop phenophase observations from 1999 to 2019 at National Agro-ecological System Observation and Research Station of Shangqiu in Henan province, and evapotranspiration observations from 2011 to 2018 at a large-scale lysimeter. Descriptive statistics and the Mann-Kendall trend test were used to explore the changing trend of crop water requirement and crop water deficit, and dominant analysis was used to clarify the influence of meteorological factors on crop water requirement.【Result】In the past 65 years, the annual effective precipitation had shown an increasing trend, rising by 3.09 mm·10a-1 and 5.23 mm·10a-1 for the wheat and maize seasons, respectively, and the effective precipitation had shown a falling trend in winter wheat seasons and annual under wet years. The annual crop water requirement had shown a highly significant falling trend (P<0.01), decreasing by 6.72 mm·10a-1 and 18.47 mm·10a-1 for the wheat and maize seasons, respectively, and the crop water requirement had shown a falling trend under different precipitation years. The annual crop water deficit has shown a highly significant falling trend (P<0.01), decreasing by 9.81 mm·10a-1 and 23.70 mm·10a-1 for the wheat and maize seasons, respectively, and the crop water deficit only showed a falling trend in winter wheat under wet years. In both normal and dry years, sunshine was the primary meteorological factor affecting the crop water requirement of winter wheat, but in wet years, humidity was the primary factor. The primary factors affecting the crop water requirement of summer maize were sunshine, wind speed, and high temperature. Sunshine was the primary factor under different precipitation years, and the sequence of wind speed and high temperature varies under different precipitation years. 【Conclusion】In wet years, winter wheat should be irrigated during jointing - heading period, while maize should not be irrigated during the season in Shangqiu. In normal years, irrigation should be irrigated during jointing - heading stage and once in tasseling stage. In dry years, in addition to irrigation before seeding, irrigation should be done in joint-heading stage and joint-tasseling stage for winter wheat and summer maize, respectively. |
| Key words: crop water requirement; winter wheat - summer maize continuous cropping; precipitation years; meteorological factors; dominant analysis; |
|
|
|
|
|
|
