采用营养液栽培,以黄瓜品种'津春2号'为材料,幼苗3叶1心时,设置以下处理：(1)CK：正常营养液栽培：(2)S：营养液中添加75 mM NaCl;(3) SS：营养液中添加75 mM NaCl,叶面喷施1 mM亚精胺(Spd)。处理第7天,取黄瓜幼苗叶片、茎和根...
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采用营养液栽培,以黄瓜品种'津春2号'为材料,幼苗3叶1心时,设置以下处理：(1)CK：正常营养液栽培：(2)S：营养液中添加75 mM NaCl;(3) SS：营养液中添加75 mM NaCl,叶面喷施1 mM亚精胺(Spd)。处理第7天,取黄瓜幼苗叶片、茎和根尖制备石蜡切片,利用光学显微镜观察和分析外源Spd对75 mM NaCl胁迫下黄瓜幼苗叶片、茎和根显微结构的影响。
Soil sickness,a phenomenon of negative plant-soil feedback in continuous monocropping systems,can cause severe yield penalty in cucumber *** in soil chemical and biological characters are thought to be account for the...
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Soil sickness,a phenomenon of negative plant-soil feedback in continuous monocropping systems,can cause severe yield penalty in cucumber *** in soil chemical and biological characters are thought to be account for the soil sickness of cucumber. However,changes in soil chemical characters and enzyme activities in the continuous monocropping system and the link between these changes and cucumber growth performance were not well *** this study,dynamics of soil chemical characters and enzyme activities were monitored in a continuously monocropped cucumber system,in which cucumber was successively monocropped in pots for nine croppings under greenhouse *** showed an obvious stunted growth behavior in the seventh cropping and turned better in the ninth *** pH decreased from the first cropping to the seventh cropping and increased in the ninth cropping,but soil electrical conductivity had the opposite *** of soil available nitrogen,phosphorous and potassium were the highest while activities of soil urease,neutral phosphatase and catalase were the lowest in the seventh *** results suggested that increases in soil nutrients and changes in soil enzyme activities may be linked to the stunted growth of continuously monocropped cucumber.
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