LIU Jie,HU Xiaotao,WANG Wene,et al.Response of Growth，Quality and Element Utilization Efficiency of Hydroponic Lettuce to Light Intensity and Photoperiod[J].Northern Horticulture,2019,43(05):70-78.[doi:10.11937/bfyy.20182895]
光强与光周期交互作用对水培生菜生长的影响
- Title:
- Response of Growth，Quality and Element Utilization Efficiency of Hydroponic Lettuce to Light Intensity and Photoperiod
- Keywords:
- hydroponic lettuce; light intensity; photoperiod; growth; quality; element utilization efficiency
- 文献标志码:
- A
- 摘要:
- 以香港“玻璃脆”散叶生菜为试材，在不同光强（150、200、250、300 μmol?m-2?s-1）和不同光周期（8、12、16 h?d-1）处理组合下，研究了光强和光周期对水培生菜生长、品质和元素利用效率的影响。结果表明：移栽后30 d内，增加光强和延长光照均能促进生菜叶片生长，光照时间和光强分别为16 h?d-1，300 μmol?m-2?s-1时最有利于生长，30~40 d时，16 h?d-1，278.67 μmol?m-2?s-1时最有利于生长。增大光强，可溶性糖、可溶性蛋白质、类胡萝卜素含量增加，但硝酸盐和维生素C含量先减小后增大，长光照有助于可溶性糖、可溶性蛋白质、维生素C和类胡萝卜素的合成并降低硝酸盐含量；主成分分析表明，300 μmol?m-2?s-1、16 h?d-1处理下对品质最有利。整个生长时期内，强光和长光照均可以提高N、P元素的利用效率，但不利于K的利用；N、P在前10 d的利用效率最大，K在后10 d时最大。综合分析，在试验范围内，前30 d，适当增加光强和延长光照时间有利于生长，但在后10 d适当降低光强（278.67 μmol?m-2?s-1）有利于生长；整个生长时期，增加光强和延长光照时间可以促进N和P元素的利用效率并提高生菜品质。
- Abstract:
- The Hong Kong ‘Iceberg’ lettuce was used as the test material,the effect of light intensity and photoperiod on the growth，quality and element utilization efficiency of lettuce in closed plant factory were studied.There were 4 light intensity levels (150,200,250,300 μmol?m-2?s-1) and 3 photoperiod levels(8 h?d-1，12 h?d-1 and 16 h?d-1) were set up.The results showed that the growth of lettuce leaves could be promoted by increasing light intensity and prolonging light within 30 days after transplanting.The growth was the best when the photoperiod and light intensity were 16 h?d-1 and 300 μmol?m-2?s-1.On the 30-40 day，the growth of lettuce leaves was optimal on condition that the photoperiod and light intensity were 16 h?d-1 and 278.67 μmol?m-2?s-1 respectively.As the increase of light intensity，soluble sugar，soluble protein and carotenoid content increased，but nitrate and vitamin C content decreased，then presented a increasing trend.The longer photoperiod contributed to synthesize soluble sugar，soluble protein，vitamin C and carotenoids，but depress nitrate，moreover，the principal component analysis showed that 300 μmol?m-2?s-1 and 16 h?d-1 were most beneficial to lettuce quality.In all growth stage，powerful beam and longer photoperiod could increase the utilization efficiency of N and P elements，but were not conducive to the utilization of K.In the first growth stage，the utilization N and P were the most efficient，but K was at the later latter stage.Comprehensive analysis showed that increasing light intensity and prolonging light time were beneficial to growth at first 30 days，but light intensity at 278.67 μmol?m-2?s-1 was beneficial to growth at later growth stage.In addition，it′s conducive to the element utilization of N，P and lettuce quality to increase light intensity and prolong photoperiod.
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备注/Memo
第一作者简介：刘杰（1992-），男，硕士研究生，研究方向为农业节水理论与技术。E-mail：1025727381@qq.com.责任作者：胡笑涛（1972-），男，博士，教授，博士生导师，现主要从事节水灌溉理论与技术等研究工作。E-mail：huxiaotao11@nwsuaf.edu.cn.基金项目：国家“863”计划资助项目（2013AA103004）。收稿日期：2018-10-25