LU Panling,GUO Shirong,ZHANG Jiarui,et al.Effects of Substrate Water Content on the Growth of Pak-choi[J].Northern Horticulture,2018,42(23):16-24.[doi:10.11937/bfyy.20181664]
基质含水量对不结球白菜生长的影响
- Title:
- Effects of Substrate Water Content on the Growth of Pak-choi
- 文献标志码:
- A
- 摘要:
- 以不结球白菜品种“新场青”“苏州青”“新夏青5号”和“抗热605”为试材，在温室里采用盆栽方式，设定4个白菜品种基质含水量处理，即基质最大持水量的100%（T1，灌水量上限，下同）、80%（T2）、60%（T3）、40%（T4），通过测定不结球白菜叶片的叶绿素荧光特性、叶绿素吸收率、类黄酮含量、氮平衡指数以及地上部和地下部干鲜质量、叶面积，比较不同基质含水量处理对不结球白菜叶绿素荧光与生长指标的影响，以期探索不结球白菜生长的灌溉依据。结果表明：4种不结球白菜在不同基质水分处理下，地上部鲜质量和叶片面积的变化规律为T2>T1>T3>T4，且各处理之间差异显著；T2、T3处理下4种不结球白菜的地上部干质量显著高于T1、T4处理；根系干鲜质量变化规律为T3>T4>T2>T1；随着基质含水量的降低，根冠比呈上升趋势，而叶片含水量呈下降趋势，类黄酮含量降低，氮平衡指数上升。基质含水量对4种不结球白菜叶绿素吸收率影响不同，且各个时期表现也不同，总体上T2处理高于其它处理。实际光量子产量和电子传递速率的变化规律均为T2>T1、T3>T4，T1、T3处理之间无显著差异。综上所述，不同基质含水量处理下不结球白菜的生长指标及叶绿素荧光差异显著，以基质最大持水量的80%为最适含水量。
- Abstract:
- Pak-choi varieties of ‘Xinchangqing’‘Suzhouqing’‘Xinxiaqing No.5’‘Kangre 605’ were used as test materials,to study the effect of different substrate water contents on the growth of Pak-choi.With the potting experiment in greenhouse,the differences among different levels of substrate water content were investigated at 100%(T1) of the biggest capacity,80%(T2),60%(T3),40%(T4).The effects of water capacity on photosynthetic characteristics and growth index were studied by measuring chlorophyll fluorescence parameter,chlorophyll,flavonoid,nitrogen balance index,biomass production of root and shoot,content of water,leaf area.The results showed that biomass production of shoot and leaf area followed by T2>T1>T3>T4,T2 and T3 were higher than T1 and T4.The root dry weight was ranked with T3>T4>T2>T1.With the decrease of substrate moisture content,the ratio of root to shoot showed an upward trend,while the water content of leaves showed a downward trend,the content of flavonoids decreased,and the nitrogen balance index increased.The moisture content of the substrate had different effects on the chlorophyll of different species,and it also showed different performances in different periods.Overall,T2 treatment was higher than other treatments.Actual quantum output of light(YII) and electron transfer rate(ETR) was ranked with T2>T1,T3>T4,there was no significant difference between T1,T3 treatment.In summary,the indicators of growth and chlorophyll fluorescence of Pak-choi treated with different substrate water content were significantly different,and 80% of the maximum water holding capacity of the substrate was the optimum moisture content.
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备注/Memo
第一作者简介：卢盼玲（1993-），女，硕士研究生，研究方向为无土栽培。E-mail：2016104125@njau.edu.cn.责任作者：朱为民（1969-），男，博士，研究员，现主要从事设施栽培技术和品种选育等研究工作。E-mail：wmzhu@126.com.基金项目：上海科技兴农资助项目（沪农科种字（2016）第1-13号）。收稿日期：2018-07-03