摘要
以“龙城二号”软枣猕猴桃为试材,采用水培法,设置对照(CK)、缺氮(-N)、缺磷(-P)及缺钾(-K)4个处理,测定软枣幼苗生长和生理特性指标,研究了大量元素缺乏对软枣猕猴桃幼苗生长和气体交换参数的影响,以期为软枣猕猴桃的缺素症状诊断和科学管理提供参考依据。结果表明:N、P、K缺乏使软枣幼苗的株高、基径和根体积均受到不同程度的抑制;同样导致软枣猕猴桃幼苗叶片的净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)、胞间二氧化碳浓度(Ci)、最大光化学量子效率(Fv/Fm)、潜在光化学效率(Fv/Fo)、光化学淬灭系数(qP)、实际光化学效率(ΦPSⅡ)和电子传递速率(ETR)显著低于CK,而非光化学淬灭系数(qN)显著高于CK(P<0.05),因此大量元素缺乏导致软枣猕猴桃幼苗产生非气孔因素的光合作用受阻,二氧化碳同化效率降低,显著影响光合作用、呼吸作用和气体交换,抑制了其正常生长。
Taking‘Longcheng No2’soft jujube kiwifruit as the test material,four treatments of control(CK),nitrogen(-N),phosphorus(-P)and potassium(-K)deficiencies were set up in hydroponics to measure the growth and physiological characteristics of soft jujube seedlings,effects of macronutrient deficiencies on the growth and gas-exchange parameters of soft jujube kiwifruit seedlings were studied,in order to provide reference for diagnosis of deficiencies in soft jujube kiwifruit and for the scientific management of the soft jujube kiwifruit.The results showed that the plant height,basal diameter and root volume of jujube seedlings were inhibited by N,P and K deficiency.It also resulted in the net photosynthetic rate(Pn),stomatal conductance(Gs),transpiration rate(Tr)and intercellular carbon dioxide concentration of kiwifruit seedlings.Ci,maximum photochemical quantum efficiency(Fv/Fm),potential photochemical efficiency(Fv/Fo),photochemical quenching coefficient(qP),actual photochemical efficiency(ΦPSⅡ)and electron transport rate(ETR)were significantly lower than those of CK,but non-photochemical quenching coefficient(qN)was significantly higher than that of CK(P<0.05).Therefore,the lack of a large number of elements led to the inhibition of non-stomatal photosynthesis in kiwifruit,and the reduction of carbon dioxide assimilation efficiency,which significantly affected photosynthesis,respiration and gas exchange,and inhibited its normal growth.
作者
王碟
王贺新
付香
任瀚
王欣
娄鑫
WANG Die;WANG Hexin;FU Xiang;REN Han;WANG Xin;LOU Xin(Life Science and Technology College,Dalian University,Dalian,Liaoning 116622)
出处
《北方园艺》
CAS
北大核心
2023年第16期26-33,共8页
Northern Horticulture
基金
国家自然科学基金青年基金资助项目(31700602)
大连市重点研发计划资助项目(2022YF16SN036)。
关键词
软枣猕猴桃
元素缺乏
气体交换参数
叶绿素荧光参数
Malus pumila cv.‘Fuji'
element deficlency
gas exchange parameters
chlorophyll fluorescence parameters
作者简介
第一作者:王碟(1997-),女,硕士研究生,研究方向为植物生理营养。E-mail:1638676960@qq.com;娄鑫(1984-),男,博士,讲师,现主要从事植物营养及软枣子猕猴桃育种等研究工作。E-mail:milo8482@163.com.
