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用盆栽试验在无氮（Ｎ０）、每公斤土壤０．１５ｇ氮（Ｎ１）、０．３０ｇ氮（Ｎ２）和干旱胁迫（正常供水Ｗ１、轻度干旱Ｗ２、中度干旱Ｗ３、重度干旱Ｗ４）以及品系抗旱性差异（ＴＡＭ品种的高抗Ｖ１和低抗Ｖ３）的条件下研究冬小麦抗旱性和硝酸还原酶活性（ＮＲＡ）的关系。结果表明，近等基因系抗旱性小麦高抗（Ｖ１）和低抗（Ｖ３）品系孕穗期功能叶ＮＲＡ存在显著的差异，在Ｗ２到Ｗ４的干旱胁迫过程中，Ｖ１的ＮＲＡ大于Ｖ３。Ｎ１下Ｖ１的ＮＲＡ也大于Ｖ３。对品系、干旱胁迫、氮肥３因素试验结果，通过把同一品系同一水分处理的ＮＲＡ平均消除氮素的干扰；把同一品系同一氮肥处理的ＮＲＡ平均消除水分的干扰的结果分别证明，在中等氮肥水平内，任何干旱强度（轻度、中度、重度干旱胁迫）下，高抗小麦Ｖ１的ＮＲＡ＞低抗小麦Ｖ３的ＮＲＡ。在此条件ＮＲＡ作为抗旱性的指标。同时Ｖ１和Ｖ３可用于筛选小麦抗旱的形态学、生理和生化指标。
Pot experiments were conducted under nitrogen (N0), 0.15g nitrogen (N) per kg of soil, 0.30g nitrogen (N2) and drought stress (normal water supply W1, mild drought W2, moderate drought W3, severe drought W4) And the relationship between drought resistance and resistance of winter wheat cultivars to high and low resistance to T and V 3, the relationship between drought resistance and nitrate reductase activity (NRA) in winter wheat was studied. The results showed that there was a significant difference in functional leaf NRA at the booting stage between the near-isogenic lines Drought resistant wheat (VI) and low resistant (V3) lines. The NRA of V1 was greater than V3 during the drought stress from W2 to W4. The NRA for V1 under N1 is also greater than V3. The results of the three factors of strain, drought stress and nitrogen fertilizer showed that the NRA of the same strain treated with the same water could eliminate the interference of nitrogen on average; the interference of the same strain of NRA treated with the same strain of nitrogen eliminated the interference of water, NRA of high resistant wheat V1> NRA of low resistant wheat V3 under any drought intensity (mild, moderate, severe drought stress). In this condition NRA is used as an indicator of drought resistance. At the same time, V1 and V3 can be used to screen wheat drought, morphological, physiological and biochemical indicators.