干旱逆境下药剂处理小麦种子对灌浆期某些生理影响与产量形成的关系  

Effects of Wheat Seed Treatment with Chemical Substances on Some Physiological Activities in The Grain Filling Stage and The Relationship to Yield Formation under Drought Stress

作　　者：汪沛洪[1] 王保莉[1] 张林生[1] 曹让[1] 王喜庆[1] 山仑[1] 

机构地区：[1]西北农业大学,西北水土保持研究所

出　　处：《干旱地区农业研究》1995年第3期58-66,共9页Agricultural Research in the Arid Areas

基　　金：国家攀登计划9219项目

摘　　要：在自然干旱条件下，进行田间小区试验，用１％ＣａＣｌ２、５０μｇ／ｍｌＧＡ及其１：１的Ｃａ＋ＧＡ混合剂处理小麦种子，观察对后期生长（灌浆期）某些生理变化与籽粒产量的关系。结果表明，药剂处理对灌浆期叶片含水量、叶绿素含量、光合作用参数、籽粒干物质积累都有不同程度的效应。其中以Ｃａ２＋处理的效果最佳。这些结果与考种分数综合分析是一致的。其原因是籽粒产量不仅受生长后期一些生理活动的影响，也受生长初期的影响，而经Ｃａ＋ＧＡ处理后成苗率高，成穗株数较多，对环境条件变化表现出较强的适应能力。Wheat seed dressing was treated with1%of solution of calcium(CaCl2)and 50 μg/ml of gibberelin(GA)and their mixture(1 :1)in the field plots;and its some physiological activities in the grain filling stage and the relationship between these activ- ities and the formation of the grain yield were observed. These experimental results showed that chemical (Ca2+, GA and Ca +GA)treatment to wheat seed can affect the changes in water content( in leaves ),chlorophyll content , photosynthetic parameters and dry matter accumulation during the grain filling stage. The effect of Ca2+treatment is the best among them. These results were in agreement with the results of the compre- hensive analysis for seed inspection. But in the grain yield, the effect of Ca+GA treat- ment is the best,The main reason was that the grain yield was affected by physiological activities not only in the late stage but also in the early stage. As a result,the rate of seedling maturity was increased through the Ca+GA treatment,thus ,showing the bet- ter adptation to changeable environmental conditions.

关 键 词：干旱逆境 药剂处理 小麦 种子 灌浆期 产量 

分 类 号：S512.104.1[农业科学—作物学]