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盆栽试验结果表明 ,钾效率系数 (EI)和施钾效率 (KE)能很好评价小麦品种在钾缺乏条件下的钾营养效率 ;钾高效品种能在缺钾条件下获得较高产量 ;钾低效品种EI值小 ,但KE值大 ,施钾能获高产 ;钾高效品种在钾缺乏或充足条件下均能维持功能叶 ( 3～ 4叶 )中较高的钾含量 ,功能叶中 (第 3～ 4叶 )钾含量始终高于心叶和幼叶 ,钾运转系数低 ,可能是其根系吸钾能力强 ,因而能及时弥补功能叶的钾输出 ;钾高效品种籽粒中钾积累量及其占总量的百分数较高 ;钾低效品种植株功能叶中的钾含量低 ,茎、叶间钾含量差异小 ,只有在钾充足条件下 ,较多的钾积累在穗中 ;小麦品种钾营养效率与植株钾积累总量关系不大 ,而主要表现在体内钾运输、分配机制上的差异
The results of pot experiment showed that potassium efficiency coefficient (EI) and potassium application efficiency (KE) could evaluate potassium nutrition efficiency of wheat cultivars under potassium deficit condition. High potassium cultivars could achieve higher yield under potassium deficit condition. Potassium low However, the EI of the effective cultivars was small, but the value of KE was large and the yield of potassium was high. The high K fertilizers maintained high potassium content in functional leaves (3 ~ 4 leaves) under potassium deficient condition or adequate condition. 3 ~ 4 leaves) potassium content is always higher than the heart and young leaves, potassium operating coefficient is low, it may be its potassium absorption capacity of the root system, which can make up for the functional leaves of potassium output; K-efficient varieties of potassium accumulation and its Accounting for a high percentage of the total amount of potassium inefficient varieties of plant functional leaves of potassium content is low, the difference between the potassium content of stems and leaves, only under potassium sufficient conditions, more potassium accumulated in the spike; potassium varieties of potassium nutrition The efficiency has little to do with the total amount of potassium in plants, but mainly in the difference of potassium transport and allocation mechanism in vivo