| 刘永红,高强,刘晓军.丘陵黄壤区不同土层厚度下3个玉米品种花后水分利用效率比较[J].干旱地区农业研究,2005,(6):42~46 |
| 丘陵黄壤区不同土层厚度下3个玉米品种花后水分利用效率比较 |
| Effect of soil layer thickness and genotype on water use of maize after flowering |
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| DOI：10.7606/j.issn.1000-7601.2005.06.09 |
| 中文关键词: 玉米 基因型 土层厚度 夏旱胁迫 水分利用 |
| 英文关键词:maize genotype soil layer thickness the summer drought stress water use |
| 基金项目:国家科技部863计划项目(2002AA2Z4261)； 四川省杰出青年基金项目(03ZQ026-031) |
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| 中文摘要: |
| 用水分试验池和人工干旱棚模拟0.4~1.0 m土层夏季干旱胁迫,研究不同基因型玉米花后水分利用特性。结果表明:花后植株伤流强度、叶片RW C、保水力与品种的抗旱性正相关,品种的抗旱性由强至弱的顺序为C 19>C 202>C 14,并且干旱处理的伤流强度和叶片RW C随土层增厚而增强;夏旱导致玉米灌浆持续期缩短24d,抽雄吐丝间隔期延长0~7 d;土层厚度和品种抗旱性均与籽粒产量和WUE正相关,土层深厚(1 m)夏旱胁迫处理有利于抗旱品种成单19提高籽粒产量和WUE。但以0.7 m土层的平均产量和WUE最高,其可作为坡耕地改造和利用的参考指标之一。 |
| 英文摘要: |
| The experiment was conducted with pit growing and waterproof shed to evaluate the water use characteristics of maize with different genotypes after blooming period under the condition of 0.4~1.0 m soil depth and summer drought stress.The results showed that the intensity of plant wound flow,relative water capacity(RWC) of leaves and water conserving ability were positively related to the drought-resistance of varieties.The drought-resistance of varieties was C19>C202>C14,and the intensity of wound flow and RWC were added with the increase of soil layer.The milk filling period was shortened 24 d and the intervel between tasselling and silking was prolonged 0~7 d by the treatment of summer drought.Soil layer thickuess and drought-resistance of varieties were positively related to yield and water use efficiency(WUE).Summer drought was effective to increase yield and WUE of C19 with the treatment of 1.0 m soil layer,but the average yield and WUE of maize varieties were the highest with 0.7 m soil layer,which could be used as an index to reconstruct slope farmlands. |
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