| 引用本文: | 马继梅,田军仓,张瑞弯.不同溶氧量对油麦菜生长、光合指标和产量的影响[J].灌溉排水学报,2017,36(7):. |
| MA Jimei,TIAN Juncang,ZHANG Ruiwan.不同溶氧量对油麦菜生长、光合指标和产量的影响[J].灌溉排水学报,2017,36(7):. |
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| 摘要: |
| 通过大棚立体种植油麦菜试验，以灌溉水中溶氧量为试验因素，研究不同溶氧量（T1处理6.8 mg/L、T2处理8 mg/L、T3处理7.4 mg/L、T4处理1.2 mg/L）对油麦菜生长量、光合指标、植株鲜质量、干质量和产量的影响。结果表明，①不同溶氧量对油麦菜株高、叶片数和茎粗有显著性影响；各处理株高均值次序为：T2处理> T3处理> T1处理> T4处理，叶片数均值次序与株高的相同；②不同溶氧量对叶绿素质量分数、净光合速率、蒸腾速率、气孔开度有显著性影响，但是对胞间CO2摩尔分数影响并不显著；③不同溶氧量对单株鲜质量和干质量影响显著，T2处理的单株鲜质量和干质量最大，分别为56.25、10.71 g； T4处理的最小，分别为42.64、3.52 g； T1、T2、T3处理与T4处理相比产量分别提高了13.2%、22.6%、28.3%。以产量为研究目标时，7.4 mg/L溶氧量+灌水定额45 m3/hm2为最佳组合。 |
| 关键词: 节水灌溉； 溶氧量； 油麦菜； 光合指标； 产量 |
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| Effects of Dissolved Oxygen on Growth, Photosynthesis and Yield of Leaf Lettuce |
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MA Jimei, TIAN Juncang, ZHANG Ruiwan
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College of Civil and Hydraulic Engineering ,Ningxia University, Yinchuan 750021, China;Ningxia Research Center of Technology on Water-saving Irrigation and Water Resources Regulation, Yinchuan 750021, China; .Center of Engineering Research of Education Department on Efficient Utilization of Water Resources in Modern Agriculture in Arid Regions, Yinchuan 750021, China
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| Abstract: |
| We studied the impact of dissolved oxygen concentration in irrigating water on growth, photosynthesis, fresh weight,dry weight and yield of leaf lettuce grown in a greenhouse. Four concentrations were examined: 6.8 mg/L (T1), 8 mg/L (T2), 7.4 mg/L (T3) and 1.2 mg/L(T4). The findings were as follows: ①The dissolved oxygen concentration has a significant impact on lettuce height, leaf numbers and stem diameter; both height and leaf number of the lettuce under different treatments decreased in the order of T2> T3> T1>T4. ②The dissolved oxygen concentration also has a significant effect on chlorophyll content, net photosynthetic rate, transpiration rate, and stomatal aperture, but has less impact on intercellular CO2 concentration. ③The dissolved oxygen has remarkable impact on fresh and dry plant weights. The highest fresh weight and dry weights were in T2, being 56.25 g and 10.71 g respectively. The lowest fresh and dry weights were in T4, being 42.64 g and 3.52 g respectively. The yield in T1, T2 and T3 increased by 13.2%, 22.6% and 28.3% respectively compared with that in T4. The results showed that a combination of dissolved oxygen concentration of 7.4 mg/L with amount of irrigation of 45 m3/hm2 achieved the highest yield. |
| Key words: water saving irrigation; dissolved oxygen concentration; leaf lettuce; photosynthesis indexes; yield |
