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作 者 ：刘国栋;刘更另

期 刊 ：植物营养与肥料学报 1998年 4卷 4期 页码：360-365

关键词：水稻；钾素利用效率；微区试验；

摘 要 ：本研究用微区试验研究了4种典型基因型在田间条件下对钾、钠反应的遗传差异。这4种基因型是经液培方法从近300种基因型中筛选得到的。结果表明，在低钾条件下，钾高效基因型的钾素利用效率、钾素经济利用效率、对胡麻斑病的抗性等都显著高于钾低效基因型;不同基因型对钠的反应差异明显;茎叶的钾钠含量互成显著的反相关。

Abstract:A micro-plot experiment in the field was conducted in four typical indica rice genotypes of potassium efficiencies of utilization. The micro-plot was consisted of a PVP tube with both width and height of 30 cm. i.e. 7. 07× 10^-2 m². The tube was inserted into plowing player until subsoil, about 20 cm in the soil. Three clumps were planted in each micro-piot. There were three K levels: 0.1(60kg K₂SO₄ /hm²) and 2(120kg K₂SO /hm²) and two Na levels: 0 and 1 (39. 6kg Na₂SO₄ /hm²] with three replicates. There were 72 micro-plots in the trial. Four rice genotypes including two k-efficient ones, Xiangaizhao 9 and Xiangzhonuol, one medium K-efficient one, 89- 642 and one K-inefficient one P3299F4-78-3-1B-1 were used. The four genotypes were selected from about 300 genotypes in hydroponics. The results showed that k-efficient genotypes were much better in efficiencies of potassium utilization, economic efficiencies of potassium utilization and resisitance to brown spots than the K-inefficient ones. Grain yield of the K-efficient genotype, Xiangaizao 9 was as much as 3 to 5 times of that of the K-inefficient one, P3299F4-78-3-1B-1.The genntypic differences to sodlum were marked. The contents of potasslum in sho0t System were significantly inversely interrelated with those of sodium (r=-0. 5046^**, n=72).

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