沼液浓度对水培生菜营养液特性及产量、品质的影响.pdfVIP

110 中国沼气Chin.a Bwgas 2016 , 34(6) 沼液浓度对水培生菜营养液特性及产量、品质的影响 杨 鑫，王文娥， 胡笑涛，李兴杰，苏苑君 (西北农林科技大学早区农业水土工程数育部重点实验室，陕西杨凌 7121 ∞) 拥 要:研究有机无机复合营养液对于增加水培蔬菜的产量、改善品质具有重要意义。 该试验研究了不同浓度沼 液替换山崎营养液对营养液特性及水箱生菜产量和品质的影响。 结果表明:深液流栽培条件下，由于养分吸收和 水分吸收同步，EC 值并不会显著下降;适量的沼液替换比例增加了生菜产量，且在一定范围内，随替换比例增加而 增大;在生长后期，旺盛的地上地下生长加快了水分消耗.浓缩了营养液，EC 值增加; 泪液可以缓冲营养液pH 值 的变化，但产量较高处理的生菜由于根系分泌酸性物质增加，pH值在生长后期显著下降，营养液呈中等酸性;沼液 替换营养液使生菜的可溶性糖、可溶性蛋白含量都有明显提高，生菜的 VC 和硝酸盐含量都随泪液替换浓度的增大 而逐渐减小。研究结果为泪液替换无机营养液水培生菜及营养液科学管理提供了依据。 关键询:沼液;水培生菜; 产量;品质 中图分类号: 5216.4 文献标志码: B 文章编号:1α)() -1 166(20 16) 06 -0110 -05 Effeds of Differeot Concentration of Biogas Slurry on Nutrient Solution Characteristics and Hydroponic Lettuce Yield and Quality / YANG Xin . WANG Wen-e , HU Xiao-tao , LI Xing-jie , SU Yuan才回 / ( Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas. Ministry of Edu铺tion ， Northwest A F U- nfverslty ,YangIing 7121∞， China) Abs衍ad: 节le Yamazaki nutrienl solulion for hy命。ponic leltuce cultivation were replaced partially by different concenlra- tions of biogas slurry in this study. The resuh showed thal , under the condition of deep fluid cultivation , the EC value of nu lrÌent solution did nol signiIicantly declined due 10 the abωrption of nulrienls and waler were synchronous. Appropriate ralio of biogas slurry replacemenl could increase the lettuce yield , and within a certain range , the lettuce yield increased wilh the inc陀ase of replacement ra lÏo. During the later growth stage , strong grow由 of lettuce aboveground and underground accelerated the water con5umplion , and 50 concenlraled the nutrienl 501Ulion and increased lhe EC value. The biogas slurry could a1so buffer the pH change of nulrient solulion ,