文章摘要
庞琳娜,史文娟,张建丰,文利军,李涛.不同遮光度对冬小麦生长发育和水分利用效率的影响[J].水土保持通报,2018,38(4):53~59
不同遮光度对冬小麦生长发育和水分利用效率的影响
Effects of Different Shading Treatments on Growth and Water Use Efficiency of Winter Wheat
投稿时间:2017-06-07  修订日期:2018-03-21
DOI:10.13961/j.cnki.stbctb.2018.04.009
中文关键词: 遮光  冬小麦  生长发育  水分利用效率
英文关键词: shading  winter wheat  growth and development  water use efficiency
基金项目:国家自然科学基金项目“旱区盐碱地膜下滴灌间作棉田水盐迁移机制及土壤—植物系统响应”(51379172; 51379173);陕西省教育厅重点实验室科研计划项目(16JS085)
作者单位E-mail
庞琳娜 西安理工大学 西北旱区生态水利工程国家重点实验室培育基地, 陕西 西安 710048  
史文娟 西安理工大学 西北旱区生态水利工程国家重点实验室培育基地, 陕西 西安 710048  
张建丰 西安理工大学 西北旱区生态水利工程国家重点实验室培育基地, 陕西 西安 710048 zhangjf@xaut.edu.cn 
文利军 西安理工大学 西北旱区生态水利工程国家重点实验室培育基地, 陕西 西安 710048  
李涛 西安理工大学 西北旱区生态水利工程国家重点实验室培育基地, 陕西 西安 710048  
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中文摘要:
      [目的]探究不同程度遮光对冬小麦生长发育和水分利用效率的影响,分析遮光条件下小麦的生长发育状况及耗水特性,为节水灌溉提供新途径。[方法]通过小区试验,设置不遮光(CK)、20%遮光(L20)、40%遮光(L40)、60%遮光(L60)、80%遮光(L80)共5个处理组,分析冬小麦株高、叶面积、干物质、产量和水分利用效率的变化特征。[结果]遮光处理使冬小麦生育期延长,叶面积增加,但各处理间的株高无明显变化;L40,L60,L80处理抑制了冬小麦茎、穗干物质的积累;遮光使得光合产物在茎、叶、穗各器官中的分配比例发生变化,但L20处理对冬小麦茎、叶、穗干物质的积累和分配无明显影响;遮光使得土面蒸发量和冬小麦的总耗水量均明显降低,且遮光度越大,降低幅度越大;与CK相比,L20处理的产量下降了4.23%,水分利用效率则提高了10.11%,其他处理的产量和水分利用效率均有所下降。[结论]L20处理对产量无明显影响,但有效提高了水分利用效率,起到了明显的节水作用。
英文摘要:
      [Objective] To explore the influence of different shading on the growth and development of winter wheat and water utilization efficiency, and to analyze the growth and water consumption characteristics of wheat under the condition of shading, so as to provide a new way for water-saving irrigation.[Methods] The characteristics of leaf area, dry matter, yield and water use efficiency of winter wheat plants were studied through cell experiments, which sets five treatment groups:non-shading(CK), 20% shading(L20), 40% shading(L40), 60% shading(L60) and 80% shading(L80).[Results] The growth period of winter wheat was prolonged and the leaf area was increased through shading treatment, but there was no obvious change in plant height in each treatment; The shading of L40, L60 and L80 inhibited the accumulation of stems and ear dry matter in winter wheat, and had the function of inhibiting leaf dry matter first and then promoting it; The allocation proportion of dry matter in stems, leaves and ear organs of winter wheat was changed by shading, but there was no significant impacts on the accumulation and distribution of winter wheat stem, leaf, and dry matter in L20 shading; Both soil evaporation and total water consumption of winter wheat were significantly reduced in shading, and the larger the shading degree, the greater the decrease; Compared with CK, the yield of L20 treatment was decreased by 4.23%, the water use efficiency was increased by 10.11%, and the yield and water use efficiency of other shadings was decreased.[Conclusion] It can be seen that the water-use efficiency is effectively improved and the water saving effect is obvious without obvious effect on yield in L20 shading.
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