摘要
探讨低钾胁迫下不同大豆品种钾吸收利用效率的差异,为培育钾高效率基因型大豆品种提供理论依据。以钾不敏感型大豆品种沈农6号、GD1617和钾敏感型大豆品系铁95079-2、铁95068-5为供试材料,设低钾和高钾2个处理,测定各生育时期干物质重和各器官的含钾量,比较不同大豆品种不同处理间的差异。结果表明:在低钾条件下,低钾不敏感型大豆沈农6号和GD1617植株地上部和根系的含钾量在各生育时期均表现为与高钾处理的植株比较接近,且成熟期无论是籽粒、荚皮,还是茎秆,均表现了相对较高的含钾量,分别为籽粒1.12%和1.01%、荚皮0.84%和0.76%、茎秆0.62%和0.56%,钾利用效率(64.8 g.g-1和65.8 g.g-1)和钾经济效率比(78.3 g.g-1和79.9g.g-1)亦均较高;而低钾敏感型大豆铁95079-2和铁95068-5各指标则表现相反,两品种含钾量分别为籽粒0.76%和0.88%、荚皮0.33%和0.38%、茎秆0.23%和0.16%,钾利用效率分别为57.8 g.g-1和61.9 g.g-1,钾经济效率比分别为68.2 g.g-1和70.6 g.g-1。说明低钾不敏感型大豆对钾肥的吸收利用效率较高,而低钾敏感型大豆较低。
The aim of this study was to investigate the differences in the potassium uptake and utilization efficiency of different genotype soybeans under the low-potassium stress and to offer a theoretical basis for breeding potassium efficient soybean varieties. The potassium uptake and utilization abilities of inefficient soybeans Shennong 6 and GD1617 and the efficient soybeans Tie95079-2 and Tie95068-5 were grown in pot experiment with two potassium content treatments （low-potassium and high-potassium） and the investigation was carried out at each period. Dry matter weight and potassium content in different organs were tested. The results showed that in the every development period, the total potassium contents in shoot or root under the low-potassium stress of the potassium uptake and utilization abilities of efficient soybeans Shennong 6 and GD1617 were similar to that under high-potassium level. And the potassium contents in seed, pod husk and stem of efficient genotype soybeans were high under the low-potassium stress. The potassium contents of Shennong 6 and GD1617 were 1.12% and 1.01% in seed, 0.84% and 0.76% in pod husk, and 0.62% and 0.56% in stem, respectively. The potassium utilizing efficiency （64.8 g.g-l and 65.8 g.g-1） and potassium economic efficiency ratio （78.3 g.g-1 and 79.9 g.g-1） of efficient genotype soybeans were high too. Whereas the characteristics above all of inefficient soybeans Tie95079-2 and Tie95068-5 were the contrary. Such as the potassium contents was 0.76% and 0.88% in seed, 0.33% and 0.38% in pod husk, and 0.23% and 0.16% in stem, respectively. The potassium utilizing efficiency was 57.8 g·g-1 and 61.9 g.g-1 and potassium economic efficiency ratio was 68.2 g.g-1 and 70.6 g.g-1, respectively. So it could be concluded that the characteristics in potassium uptake and utilizing efficiency of the efficient genotype soybeans were beneficial to that of inefficient genotype soybeans under the low-potassium stress.
出处
《沈阳农业大学学报》
CAS
CSCD
北大核心
2013年第1期7-12,共6页
Journal of Shenyang Agricultural University
基金
国家自然科学基金项目(31271644)
关键词
大豆
低钾胁迫
吸收效率
利用效率
soybean
low-potassium stress
potassium uptake efficiency
potassium utilization efficiency
