黑河中游地区作物用水效率比较及种植结构调整方向研究

doi:10.3724/SP.J.1047.2016.00977

地球信息科学学报 ›› 2016, Vol. 18 ›› Issue (7): 977-986.doi: 10.3724/SP.J.1047.2016.00977

• 地理空间分析综合应用 • 上一篇下一篇

黑河中游地区作物用水效率比较及种植结构调整方向研究

郑璐倩^1,^2,³(), 谈明洪^1,^2,^*()

1. 中国科学院地理科学与资源研究所,北京 100101
2. 中国科学院陆地表层格局与模拟重点实验室,北京 100101
3. 中国科学院大学,北京 100049

收稿日期:2015-07-09 修回日期:2015-10-01 出版日期:2016-07-15 发布日期:2016-07-15
通讯作者: 谈明洪 E-mail:zhenglq.13s@igsnrr.ac.cn;tanmh@igsnrr.ac.cn
作者简介:
作者简介：郑璐倩(1991-),女,硕士生,主要从事土地利用/覆被变化及其环境效应研究。E-mail: zhenglq.13s@igsnrr.ac.cn
基金资助:
国家自然科学基金重大研究计划项目（91325302）;国家自然科学基金重大国际合作项目(41161140352);国家自然科学基金面上项目（41271119）

A Comparative Study of Water Use Efficiency of Different Crops in the Middle Reaches of Heihe River and Its Implications for Planting Structure Adjustment

ZHENG Luqian^1,^2,³(), TAN Minghong^1,^2,^*()

1. Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
2. Key Laboratory of Land Surface Pattern and Simulation, Beijing 100101, China
3. University of Chinese Academy of Sciences, Beijing 100049, China

Received:2015-07-09 Revised:2015-10-01 Online:2016-07-15 Published:2016-07-15
Contact: TAN Minghong E-mail:zhenglq.13s@igsnrr.ac.cn;tanmh@igsnrr.ac.cn

摘要/Abstract

摘要：

黑河流域地处西北干旱区,水资源短缺是限制其中游绿洲农业发展、下游生态环境保护的首要原因。该流域的中游绿洲农业用水约占总用水量的80%,因此农业节水对流域发展至关重要。在干旱区绿洲农业节水探索中,众多学者主张通过节水技术来提高用水效率,而关于农业种植结构调整对农业节水影响的定量研究较少。本文采用2012年黑河流域蒸散发数据、土地利用数据、降水数据和农业经济统计数据,定量分析黑河中游主要作物需水特征和用水效率差异,尝试从调整作物种植结构角度为其绿洲农业节水提供依据。结果表明：(1)研究区4种主要作物中,玉米生长期需水量最大,其次为小麦、油菜和大麦;(2)考虑降水补给,发现大麦和油菜生长需水可很大程度上依赖降水,而小麦和玉米则需要灌溉,且玉米灌溉需水量远超小麦;(3)作物用水效率由高到低依次为大麦、油菜、小麦和玉米。从用水效率角度而言,考虑种植区位,在黑河中游适当扩大小麦种植规模更有利于提高中游农业用水效率。

关键词: 黑河流域, 农业结构, 蒸散发, 用水效率

Abstract:

The Heihe River Basin is located in the northwest arid region of China. Water shortage is the primary restrictive factor for oasis agriculture development and ecological environment protection in this region. Since the water consumed by the oasis agriculture in the middle reaches occupies about 80% of the total water resources in this basin, how to efficiently use the agricultural water resources is the key factor affecting the regional development. In the exploration of agricultural water saving measures in the arid region, most scholars advocate to improve the water use efficiency (WUE) through water-saving techniques. However, there are few quantitative studies focusing on the water saving effect of planting structure adjustment. This study takes the adjustment of agricultural planting structure as a breakthrough point to achieve the goal of agricultural water saving, considering that different crops have different water demands. We aim to explore the characteristics of the water demands of the main crops in the middle reaches of Heihe River and examine the different levels of WUE for those crops. In this paper, with the help of ArcGIS technique and based on the evapotranspiration (ET) data of Heihe River Basin and crop spatial distribution data, we extracted the ET information of the main crops during their growing seasons in 2012, which was represented as the water requirement of crop. Then, the crop ET data and crop yield data were used to calculate the WUE of four main crops. The results show that: (1) maize has the largest ET during its growing seasons, followed by wheat, rapeseed and barley; (2) considering the case of precipitation recharge, the water demands of barley and rapeseed may largely depend on rainfall, while maize and wheat require irrigation instead, and maize needs more water than wheat; (3) the WUE of crops ranking from high to low is barley, rapeseed, wheat and maize. This study argues that the appropriate increase in the size of wheat planting is helpful to improve the efficiency of agricultural water in the middle reaches of Heihe River.

Key words: Heihe River Basin, agricultural structure, evapotranspiration, water use efficiency

郑璐倩, 谈明洪. 黑河中游地区作物用水效率比较及种植结构调整方向研究[J]. 地球信息科学学报, 2016, 18(7): 977-986.DOI:10.3724/SP.J.1047.2016.00977

ZHENG Luqian,TAN Minghong. A Comparative Study of Water Use Efficiency of Different Crops in the Middle Reaches of Heihe River and Its Implications for Planting Structure Adjustment[J]. Journal of Geo-information Science, 2016, 18(7): 977-986.DOI:10.3724/SP.J.1047.2016.00977

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作物	指标
作物	产量（Y）/（kg/hm²）	生长期需水（ET）/mm	价格（P）/（元/kg）	用水效率（WUE_e）/（元/m³）
大麦	6349.50	192.92	2.30	7.57
油菜	3051.60	260.34	5.00	5.86
小麦	6189.75	314.29	2.04	4.02
玉米	7656.75	514.03	2.42	3.60

黑河中游地区作物用水效率比较及种植结构调整方向研究

A Comparative Study of Water Use Efficiency of Different Crops in the Middle Reaches of Heihe River and Its Implications for Planting Structure Adjustment

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