ZHANG Rui,ZHANG Gaobin,HUANG Mingbin.Dynamic Changes of Winter Wheat Yield and Water Balance Elements of Dryland in Long Time Series in the Southern Shanxi on the Loess Plateau[J].Research of Soil and Water Conservation,2023,30(02):142-148.[doi:10.13869/j.cnki.rswc.2023.02.013]
黄土高原晋南旱塬长时间序列冬小麦产量与水量平衡要素动态变化
- Title:
- Dynamic Changes of Winter Wheat Yield and Water Balance Elements of Dryland in Long Time Series in the Southern Shanxi on the Loess Plateau
- 文章编号:
- 1005-3409(2023)02-0142-07
- 关键词:
- Hydrus-1D模型; 晋南旱塬; 冬小麦; 水量平衡
- 分类号:
- S512.1+1
- 文献标志码:
- A
- 摘要:
- 为揭示黄土高原旱地冬小麦田长期产量及水文变化,以山西省万荣县连作冬小麦为研究对象,分析了冬小麦产量1951—2020年变化趋势及气候年际波动对产量的影响,同时利用Hydrus-1D模型和标定的模型参数模拟了1965—2020年田间水量平衡要素各分量的变化过程。结果表明:试验地冬小麦产量多年平均增产率是31.9 kg/(hm2·a),年际气候变化对冬小麦产量的影响达到±22.4%,其中影响最为显著的气象要素是生育期平均相对湿度和全年降水量; 标定期和验证期Hydrus-1D模型的决定系数分别为0.65～0.68,0.57～0.65; 近56 a冬小麦平均蒸腾量为(176±29)mm,土壤蒸发量为(296±28)mm占降水量的60%～80%,渗漏量一般小于40 mm,土壤含水量变化为(-2±45)mm。综上,研究地70 a冬小麦产量呈上升趋势,且受年际气候变化的影响其产量波动较大。Hydrus-1D模型能够较好地模拟晋南旱塬冬小麦田的水文变化情况,多年来研究地冬小麦田土壤含水量呈下降趋势。
- Abstract:
- In order to understand the long-term yield and hydrological changes of dryland winter wheat fields in the Loess Plateau, the winter wheat grown in Wanrong County, Shanxi Province was used as the research sample to analyze the change trend of winter wheat production from 1951 to 2020 and the impact of interannual climatic fluctuations on wheat yield. At the same time, the Hydrus-1D model and the calibrated model parameters were used to simulate the changing process of each component of the field water balance elements from 1965 to 2020. The results showed that the annual average yield increase rate of winter wheat was 31.9 kg/(hm2·a), and the impact of interannual climate change on winter wheat yield was ±22.4%, among which the most significant meteorological factors were average relative humidity in growth period and annual precipitation; the determination coefficients of HYDRUS-1D model in standard period and validation period were 0.65～0.68 and 0.57～0.65, respectively; in recent 56 years, the change of transpiration in winter wheat was(176±29)mm, the evaporation was(296±28)mm, the leakage was generally less than 40 mm, and the change of soil water content was(-2±45)mm. In conclusion, the yield of winter wheat in the study area showed an upward trend in the past 70 years, and its yield fluctuated greatly due to the impact of inter-annual climate change. The Hydrus-1D model can well simulate the hydrological changes of winter wheat fields in the dryland of southern Shanxi Province, and the soil water content in winter wheat fields has been decreasing for many years.
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相似文献/References:
[1]王水献,周金龙,余芳,等.应用HYDRUS-1D模型评价土壤水资源量[J].水土保持研究,2005,12(02):36.
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备注/Memo
收稿日期:2021-11-04 修回日期:2022-01-10
资助项目:中国科学院战略先导科技专项(B类)“黄土高原植被-水相互关系及其对气候变化的响应过程”(XDB40020202)
第一作者:张锐(1998—),女,河南灵宝人,硕士研究生,研究方向为土壤物理。E-mail:ruiiizhang@qq.com
通信作者:黄明斌(1968—),男,湖北荆门人,博士,研究员,主要从事生态水文和土壤物理研究。E-mail:hmbd@nwsuaf.edu.cn