| 汤海军,周建斌,王春阳.矮壮素浸种对不同小麦品种萌发生长及水分利用效率的影响[J].干旱地区农业研究,2005,(5):29~34 |
| 矮壮素浸种对不同小麦品种萌发生长及水分利用效率的影响 |
| Effects of soaking seeds with Chlormequat on germination，seedling growth and water use efficiency of different wheat cultivars |
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| DOI：10.7606/j.issn.1000-7601.2005.05.06 |
| 中文关键词: 矮壮素 小麦品种 幼苗生长 水分利用效率 |
| 英文关键词:Chlormequat (CCC) wheat cultivars seedling growth water use efficiency |
| 基金项目:国家自然科学基金项目(30230230)； 国家863农业节水项目(2002AA6Z3031) |
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| 中文摘要: |
| 通过培养试验研究了不同浓度矮壮素浸种对不同小麦品种种子萌发、幼苗生长及水分利用效率的影响。室内培养试验表明,低浓度矮壮素(≤10.0g/kg)处理提高了小偃22和陕229的发芽率、发芽势和幼苗及根的干重,高浓度(>50.0g/kg)处理则表现出明显的抑制作用;与陕229相比,小偃22对矮壮素较敏感,更容易受高浓度矮壮素的危害。土培试验表明,不同浓度矮壮素浸种提高了小偃22和小偃6号小麦叶片的叶绿素含量、光合作用速率,促进了小麦根系生长及干物质的累积。用矮壮素浸种对小麦水分利用效率的影响与小麦品种及水分供应水平有关。正常水分下,小偃22水分利用效率提高幅度明显高于小偃6号,水分胁迫时则反之,且水分胁迫下,矮壮素2.0g/kg浸种小偃6号水分利用效率提高幅度最明显。两试验均以矮壮素浓度2.0g/kg浸种效果较好。 |
| 英文摘要: |
| Chamber cultured and pot experiments were used to evaluate the effects of soaking seeds with Chlormequat (CCC) on the germination, seedling growth and water use efficiency of different wheat cultivars. The results showed that, in chamber cultured experiment, the germination ratio (GR), germination index (GI), and dry weights of shoot and root of Xiaoyan 22 and Shaan 229 were increased by soaking seeds with low concentration of CCC (≤10.0 g/kg); these parameters were obviously decreased when the concentration of CCC was high (>50.0 g/kg); compared to Shaan 229, Xiaoyan 22 was more sensitive to high concentration of CCC. In pot experiment, soaking seeds with CCC increased the content of chlorophyll in leaves and photosynthetic rate of Xiaoyan 22 and Xiaoyan No. 6, and also improved the root growth and dry matter accumulation. The effects of soaking seeds with CCC on water use efficiency were related with wheat cultivars and soil water content. The increase rate of water use efficiency of Xiaoyan 22 was higher than Xiaoyan No.6 under normal water condition; but it was reverse under water stress condition, and the increase rate of water use efficiency of Xiaoyan No. 6 was the highest when the seeds were soaked with the concentration 2.0 g/kg of CCC. The adequate concentration of CCC was 2.0 g/kg for both chamber cultured and pot experiments. |
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