摘要
旨在为水肥一体化在黄心菜设施栽培中的应用提供理论依据,本研究设置了常规施肥(CK),水肥一体化滴灌条件下常规追肥量(T1)、追肥减施33.4%(T2)和追肥减施66.7%(T3)4个处理,采用盆栽基质栽培法,探讨水肥一体化条件下追肥减量对黄心菜生长、产量、肥料偏生产力(partial factor productivity of fertilizer,PFP)和基质环境的影响。结果表明:相比CK处理,T1、T2和T3处理分别增产51.61%、44.15%和29.28%,增产显著。T3处理组PFP最高,达到139.55 kg/kg,是CK的2.4倍。水肥一体化有利于提高叶片数、开展度和最大叶面积,且在追肥后水肥一体化处理肥料见效更快。高水肥能显著提高基质碱解氮含量,但同时会造成基质中可溶性离子浓度过高。综上所述,采用水肥一体化可有效提高黄心菜产量、生长指标和PFP,建议追肥减施33.4%,不仅可显著提高产量和PFP且不易造成盐害。
To provide a theoretical basis for water-fertilizer integration in the greenhouse cultivation of B.pekinensis,this study set up four treatments:conventional fertilization(CK),conventional topdressing amount(T1),33.4%reduction of topdressing fertilizer(T2)and 66.7%reduction of topdressing fertilize(T3)under drip irrigation and fertilizer integration,and used potted substrate cultivation method to explore the effects of reducing the amount of topdressing on growth,yield,partial factor productivity of fertilizer(PFP)and substrate environment.The results showed that compared with CK,T1,T2 and T3 increased the yield by 51.61%,44.15%and 29.28%,respectively,and the yield increase was significant.PFP in T3 treatment group was the highest,reaching 139.55 kg/kg,which was 2.4 times that of CK.The water-fertilizer integration is beneficial to increasing the number of leaves,leaf divergence and the maximum leaf area,and the treatments under waterfertilizer integration after topdressing have a faster effect.High water-fertilizer can significantly increase the alkali-hydrolyzable nitrogen content of the substrate,but at the same time it will cause the concentration of soluble ions in the substrate to be too high.In conclusion,the application of water-fertilizer integration can effectively improve the yield,growth index and PFP of B.pekinensis.It is recommended that 33.4%reduction in topdressing fertilizer application can not only significantly improve the yield and PFP but also be less likely to cause salt damage.
作者
陈哲栋
侯会静
徐晓
王强
周明耀
CHEN Zhedong;HOU Huijing;XU Xiao;WANG Qiang;ZHOU Mingyao(College of Hydraulic Science and Engineering,Yangzhou University,Yangzhou,Jiangsu 225009;Water Conservancy Management Service Station of Dongbang Town,Changshu City,Suzhou,Jiangsu 215534;Jiangsu Lvbo Biotechnology Co.,Ltd.,Suzhou,Jiangsu 215534)
出处
《中国农学通报》
2022年第30期72-76,共5页
Chinese Agricultural Science Bulletin
基金
苏州市水利水务科技项目“设施瓜果类蔬菜滴灌水肥一体化灌溉制度研究”(202008)。
关键词
水肥一体化
肥料偏生产力
黄心菜
产量
肥料减施
water-fertilizer integration
partial factor productivity of fertilizer
Brassica pekinensis Lour.Rupr.
yield
fertilizer reduction
