GAO Yaqing,FAN Shengnan,ZHOU Xinyuan,et al.Effects of Root Restriction Treatment on Vegetative Growth and Quality of Spinach[J].Northern Horticulture,2023,(05):10-17.[doi:10.11937/bfyy.20222987]
限根处理对空心菜营养生长与品质的影响
- Title:
- Effects of Root Restriction Treatment on Vegetative Growth and Quality of Spinach
- Keywords:
- root restriction; photosynthesis; spinach; quality
- 文献标志码:
- A
- 摘要:
- 以“京狐竹叶”空心菜为试材,采用限制容器体积的方法，设置T1 (90 cm3)、T2 (250 cm3)和CK (700 cm3)3个处理，研究了不同体积栽培对空心菜生长、光合特性、基质理化性质和品质的影响，以期为我国高品质设施蔬菜栽培提供参考依据。结果表明：与CK相比，T1和T2的株高、茎粗、叶面积减小；根表面积、体积、根长和根尖数、干物质量相应减少，而单位根域体积内T2根系活力较高，是T1和CK的2.40、1.64倍。与CK相比，限根降低了植物的净光合速率，T1、T2分别降低17.46%和13.65%；对于叶绿素荧光而言，T1、T2处理后Fv/Fm降低至0.78和0.80，NPQ表现为CK>T2>T1。T2限根处理后速效磷、铵态氮和硝态氮含量较CK显著提高了21.27%、32.18%和53.95%。限根后pH增加缓解了基质酸性化问题，EC值增加但也在植物正常生长的范围内。此外，与CK相比，T2限根处理后可溶性糖和维生素C含量分别提高了2.06、1.43倍；可滴定酸含量之间无显著性差异。综合T1和T2处理，尤其是T2处理(250 cm3)根区矿质营养积累较多，空心菜维生素C和可溶性含糖量较高。
- Abstract:
- Taking ‘Jinghuzhuye’spinach as the test material,the method of restricting the container volume was adopted and three treatments were set up,with the volumes of T1 (90 cm3),T2 (250 cm3) and CK (700 cm3).The effects of root restriction cultivation with different volumes on the growth,photosynthetic characteristics,physical and chemical properties and quality of spinach were studied,in order to provide reference for the cultivation of high-quality protected vegetables in China.The results showed that compared with CK,the plant height,stem diameter and leaf area of T1 and T2 decreased; the root surface area,volume,root length,number of root tips and dry matter decreased accordingly.However,the root activity of T2 was higher in unit root domain volume,which was 2.4 times and 1.64 times than that of T1 and CK.Compared with CK the net photosynthetic rate of plants reduced by 17.46% and 13.65% in T1 and T2,respectively.For chlorophyll fluorescence,the Fv/Fm value decreased to 0.78 and 0.80 in T1 and T2 treatments and the NPQ showed CK>T2>T1.Compared with CK,the contents of available phosphorus,ammonium nitrogen and nitrate nitrogen were significantly increased by 21.27%,32.18% and 53.95% after T2 root restriction treatment.The increase of pH after root restriction alleviated the acidification of the substrate,and the increase of EC was also within the range of normal plant growth.In addition,compared with CK,the contents of soluble sugar and vitamin C in T2 root restriction treatment increased by 2.06 times,1.43 times respectively.And there was no significant difference between titratable acids.For T1 and T2 treatments,especially T2 treatment (250 cm3),more mineral nutrients were accumulated in the root zone,and the content of vitamin C and soluble sugar in spinach was high.
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备注/Memo
第一作者简介：高亚轻（1993-），女，硕士，研究实习员，现主要从事设施无土栽培等研究工作。E-mail：1040190747@qq.com.责任作者：季延海（1989-），男，硕士，助理研究员，现主要从事设施无土栽培等研究工作。E-mail：jiyanhai@nercv.org.基金项目：北京市农林科学院科技创新能力建设专项资助项目（KJCX20210437）；国家现代农业产业技术体系资助项目（CARS-23-G-06）。收稿日期：2022-11-08