西藏地区春青稞耗水特征及适宜灌溉制度探讨

doi:10.11849/zrzyxb.2010.10.005

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自然资源学报 ›› 2010, Vol. 25 ›› Issue (10) : 1666-1675. DOI: 10.11849/zrzyxb.2010.10.005

资源利用与管理

西藏地区春青稞耗水特征及适宜灌溉制度探讨

尹志芳, 欧阳华, 张宪州

作者信息 +

Study on Water Consumption of Spring Naked Barley Land and Suitable Irrigation System in Tibet

YIN Zhi-fang, OUYANG Hua, ZHANG Xian-zhou

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文章历史 +

摘要

以中科院拉萨高原生态试验站为依托,通过开展春青稞生长与土壤水分定位观测实验,利用SHAW模型实现对春青稞农田蒸散发与土壤水深层渗漏与补给过程模拟,分析了春青稞的耗水特征,并对其适宜的灌溉制度进行了初步探讨:①春青稞生长期间,耗水450 mm左右,其中,分蘖—拔节、拔节—抽穗、抽穗—蜡熟这3个阶段是春青稞的耗水旺期,耗水量占整个生长期的72%。把握住该时期的水分供应,对提高作物产量十分重要。②在春青稞的需水关键期降水量仅能满足作物需水的58%,必须补充人工灌溉;但现行的灌溉制度由于灌溉量较大,不仅加大土壤蒸发,更造成较大的深层渗漏。③在播种—出苗、拔节—抽穗期分别灌溉50 mm,抽穗—蜡熟期灌溉60 mm,共减少灌溉用水125 mm后,深层渗漏减少了81%(131 mm);深层土壤水向上补给量增加了55%(44 mm)。节水灌溉不仅减少了土壤蒸发与深层渗漏也促使深层土壤水向上补给根系层,应该大力推广这一灌溉制度。

Abstract

Based on the crop growth and soil water content observed experiments in Lhasa Plateau Ecosystem Research Station, this paper used SHAW model to investigate the characteristics of water consumption and soil water deep percolation and deep soil water recharge of spring naked barley land. Then, the paper also discussed the prospective of the suitable irrigation scheduling according to the comparison of water consumption and water deep percolation and deep soil water recharge under sufficient irrigation and nonsufficient irrigation. Major results are reported as follows:1) Total water consumption of spring naked barley is estimated to be 450 mm. Hereinto, tillering to shooting, shooting to tasseling and tasseling to grain filling are the dominating water consumed stages, the water consumption of which accounts for 72%. So,it is important to ensure water supply in this stage.2) In the dominating water consumed stages, precipitation only covers 58% of the water requirement of spring naked barley, so, supplying irrigation is necessary. But, the existing irrigation scheduling enhances soil water evaporation and causes huge deep percolation.3) If the amount of 50 mm water is irrigated in the planting-emerging and shooting-tasseling stages respectively and 60 mm in the tasseling-grain filling stage, the total irrigation amount reduces 125 mm, deep percolation will reduce 81% (131 mm) and deep soil water recharge will increase 55% (44 mm). The prospective less irrigation would reduce deep percolation greatly and promote water recharge from deeper soil layer. Therefore, the prospective less irrigation should be extended.

导出引用

尹志芳, 欧阳华, 张宪州. 西藏地区春青稞耗水特征及适宜灌溉制度探讨[J]. 自然资源学报, 2010, 25(10): 1666-1675 https://doi.org/10.11849/zrzyxb.2010.10.005

YIN Zhi-fang, OUYANG Hua, ZHANG Xian-zhou. Study on Water Consumption of Spring Naked Barley Land and Suitable Irrigation System in Tibet[J]. JOURNAL OF NATURAL RESOURCES, 2010, 25(10): 1666-1675 https://doi.org/10.11849/zrzyxb.2010.10.005

中图分类号： S274.1

参考文献

[1] 楼惠新. 青藏高原青稞发展与对策[J]. 农业发展探索, 2000(2): 28-31. [2] 魏兴琥, 杨萍, 董光荣. 西藏"一江两河"中部地区的农业发展与农田沙漠化[J]. 中国沙漠, 2004, 24(2): 196-200. [3] 于铜钢. 西藏拉萨河谷农业开发潜在生存空间及其开发战略[J]. 农业工程学报, 1989, 5(1): 1-7. [4] 胡书银, 王建林. 西藏一江两河地区水资源及其开发利用[J]. 国土与自然资源研究, 1999(2): 16-18. [5] 李春, 许燕. 拉萨地区麦类作物需水状况和适宜灌溉问题探讨[J]. 西藏科技, 1999, 86(4): 28-34. [6] Flerchinger G N, Saxton K E. . Simultaneous heat and water model of freezing snow-residue-soil system. ⅠTheory and development [J]. Trans. ASAE, 1989, 32: 565-571. [7] Flerchinger G N, Pierson F B. Modeling plant canopy effects on variability of soil temperature and water [J]. Agricultural and Forest Meteorology, 1991, 56: 227-246. [8] Flerchinger G N, Saxton K E. Simultaneous heat and water model of freezing snow-residue-soil system Ⅱ Field verification [J]. Trans. ASAE, 1989, 32: 573-578. [9] Xu X, Nieber J L, Baker J M, et al. Field testing of a model for water flow and heat transport in variably saturated, variably frozen soil[M]//Transportation Research Record No.1307, Transp. Res. Board, Nat. Res. Council, Washington D. C., 1991: 300-308. [10] Pierson F B, Flerchinger G N, Wright J R. Simulating near-surface soil temperature and water on sagebrush rangelands: A comparison of models [J]. Trans. ASAE, 1992, 35: 1449-1455. [11] Flerchinger G N, Pierson F B. Modeling plant canopy effects on variability of soil temperature and water: Model calibration and validation [J]. J. Arid Environ., 1997, 35: 641-653. [12] Flerchinger G N, Sauer T J, Aiken R A. Effects of crop residue cover and architecture on heat and water transfer [J]. Geoderma, 2003, 116: 217-233. [13] Preston G M, McBride R A. Assessing the use of poplar tree systems as a landfill evapotranspiration barrier with the SHAW model [J]. Waste Management & Research, 2004, 22: 291-305. [14] Flerchinger G N, Kustas W P, Weltz M A. Simulating surface energy and radiometric surface temperatures for two arid vegetation communities using the SHAW model [J]. Journal of Applied Meteorology, 1998, 37(5): 449-460. [15] Kang Ersi, Cheng Guodong, Song Kechao, et al. Simulation of energy and water balance in soil-vegetation-atmosphere transfer system in the mountain area of Heihe River Basin at Hexi Corridor of Northwest China [J]. Science in China Ser. D Earth Sciences, 2005, 48(4): 538-548. [16] Huang M, Jacques Gallichand. Use of the SHAW model to assess soil water recovery after apple trees in the gully region of the Loess Plateau, China [J]. Agricultural Water Management, 2006, 85: 67-76. [17] 尹志芳, 欧阳华, 徐兴良, 等. 拉萨河谷灌丛草原与农田水热平衡及植被水分利用特征研究[J]. 地理学报, 2009, 64(3): 303-314. [18] 李瑞平, 史海滨, 赤江刚夫, 等. 基于水热耦合模型的干旱寒冷地区冻融土壤水热盐运移规律研究[J]. 水利学报, 2009, 40(4): 403-412. [19] 尹志芳, 欧阳华, 徐兴良, 等. 基于SHAW模型对拉萨河谷冬小麦农田生态系统水分传输特征的模拟研究[J]. 生态学报, 2009, 29(4): 2010-2019.