黄土高原半干旱区作物水分利用研究新途径

应用生态学报 ›› 1997, Vol. 8 ›› Issue (1): 104-109.

黄土高原半干旱区作物水分利用研究新途径

李凤民, 赵松岭

兰州大学干旱农业生态国家重点实验室, 兰州 730000

收稿日期:1996-01-15 修回日期:1996-02-29 出版日期:1997-01-25 发布日期:1997-01-25
基金资助:
国家自然科学基金(39400019);甘肃省中青年基金(ZQ-95-006);国家攀登计划资助项目

New approaches in researches of water use efficiency in semi arid area of Loess Plateau

Li Fengmin, Zhao Songling

The State Key Laboratory of Arid Agroecology, Lanzhou University, Lanzhou 730000

Received:1996-01-15 Revised:1996-02-29 Online:1997-01-25 Published:1997-01-25

摘要/Abstract

摘要： 以黄土高原半干旱区农业生产条件,特别是土壤水分特性为背景,结合植物根冠通讯方面的有关研究进展,讨论了根化学信号在本地区的研究与开发潜力.本地区节水农业的核心是提高作物的水分利用效率,其途径包括:1)减少土壤表面的无效蒸发量;2)增加深层根量,减少表土中的根量,优化资源分配模式,提高繁殖分配比例.根化学信号对这两方面都有重要影响.基于目前的知识积累,应在根化学信号对作物生产力的影响方面作深入研究,可揭示节水农业中某些重要的理论问题.

关键词: 黄土高原, 半干旱区, 水分利用效率, 根冠通讯, 根化学信号, 土壤无机碳, 碳稳定同位素, 土壤有机碳, δ¹³C值, 准噶尔盆地

Abstract: Based on the background of agricultural conditions, especially the soil water characters in semi arid area of Loess Plateau, and on combining with the progress in field of root to shoot communication, the research and developmental potential of root chemical signals were discussed in this paper. The core of water saving agriculture in this area is to increase crop's water use efficiency (WUE). The ways for increasing WUE should be included: 1)decreasing inefficient evaporation from soil surface, and 2)increasing roots in deep soil, decreasing those in top soil, optimizing resource allocation pattern, and increasing reproductive allocation proportion. Root chemical signals affect strongly all the two aspects. According to the present accumulation of knowledge, the study on effects of root chemical signal on crop productivity can reveal some important theoretical problems.

Key words: Loess Plateau, Semi arid area, Water use efficiency, Root to shoot communication, Root chemical signal, soil inorganic carbon, carbon stable isotope, soil organic carbon, δ¹³C value, Junggar Basin

李凤民, 赵松岭. 黄土高原半干旱区作物水分利用研究新途径[J]. 应用生态学报, 1997, 8(1): 104-109.

Li Fengmin, Zhao Songling . New approaches in researches of water use efficiency in semi arid area of Loess Plateau[J]. Chinese Journal of Applied Ecology, 1997, 8(1): 104-109.

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