Betula alnoides is a fast-growing hardwood species grown in large plantations in Southeast Asia and South China.Nitrogen requirements for producing robus seedlings,growth and nutrient dynamics were investigated using ...Betula alnoides is a fast-growing hardwood species grown in large plantations in Southeast Asia and South China.Nitrogen requirements for producing robus seedlings,growth and nutrient dynamics were investigated using exponential fertilization treatments.Root collar diameter,height,dry mass and nutrient contents of seedlings increased exponentially in all fertilization treatments as time progressed.Moreover,with water soluble fertilizer（Plant Products plus microelements N–P2O5–K2O：20–20–20）,300 mg N seedling-1was adequate.Vector analysis revealed that P was the most responsive nutrient element followed by N and K.Dilutions of N and K were evident in the plants without N addition,which induced initial P sufficiency and then luxury consumption probably due to the antagonistic interaction between N and P.However deficiencies of N,P and K were mostly observed in al exponential regimes during the experiment because seedling growth rate exceeded nutrient uptake rate,inferring that further study on improving the nutrient uptake efficiency is needed.Analysis of relationships among nutrient supply,dry mass,N content and N concentration demonstrated that 100–400 mg N seedling-1induced sufficiency to luxury consumption of nitrogen without significant change in dry mass,and 400 mg N seedling-1is recommended to apply for nutrient loading of seedlings before outplanting.The findings will help improve seedling quality and enhance the production of robust seedlings for plantation forestry of this species.展开更多
ABSTRACT： Under the guidance of the dual economy and hedonic consumption concept, the Song capital continue to meet basic survival needs, while demand has been further development, namely to improve the quality of li...ABSTRACT： Under the guidance of the dual economy and hedonic consumption concept, the Song capital continue to meet basic survival needs, while demand has been further development, namely to improve the quality of life and business development of production requirements, even for non-moderate luxury pleasure obsession. The life of Song bustling capital has a history of some bad consumer behavior similarities with today＇ s Chinese society, learning from experience and establish appropriate consumer attitudes, which have focused on establishing a scientific degree of consumer attitudes in order to ensure the healthy development and sustainability of the market, it also pointed out the shortcomings of extravagant consumption concept and lessons learned from, it has considerable historical reference.展开更多
U.S. management consultancy firm Bain& Company has released a report showing in 2009 China’s luxury goods market swelled by nearly 12 percent, reaching $9.6 billion and accounting
基金financially supported by The Ministry of Science and Technology,China(2012BAD21B0102)
文摘Betula alnoides is a fast-growing hardwood species grown in large plantations in Southeast Asia and South China.Nitrogen requirements for producing robus seedlings,growth and nutrient dynamics were investigated using exponential fertilization treatments.Root collar diameter,height,dry mass and nutrient contents of seedlings increased exponentially in all fertilization treatments as time progressed.Moreover,with water soluble fertilizer（Plant Products plus microelements N–P2O5–K2O：20–20–20）,300 mg N seedling-1was adequate.Vector analysis revealed that P was the most responsive nutrient element followed by N and K.Dilutions of N and K were evident in the plants without N addition,which induced initial P sufficiency and then luxury consumption probably due to the antagonistic interaction between N and P.However deficiencies of N,P and K were mostly observed in al exponential regimes during the experiment because seedling growth rate exceeded nutrient uptake rate,inferring that further study on improving the nutrient uptake efficiency is needed.Analysis of relationships among nutrient supply,dry mass,N content and N concentration demonstrated that 100–400 mg N seedling-1induced sufficiency to luxury consumption of nitrogen without significant change in dry mass,and 400 mg N seedling-1is recommended to apply for nutrient loading of seedlings before outplanting.The findings will help improve seedling quality and enhance the production of robust seedlings for plantation forestry of this species.
文摘ABSTRACT： Under the guidance of the dual economy and hedonic consumption concept, the Song capital continue to meet basic survival needs, while demand has been further development, namely to improve the quality of life and business development of production requirements, even for non-moderate luxury pleasure obsession. The life of Song bustling capital has a history of some bad consumer behavior similarities with today＇ s Chinese society, learning from experience and establish appropriate consumer attitudes, which have focused on establishing a scientific degree of consumer attitudes in order to ensure the healthy development and sustainability of the market, it also pointed out the shortcomings of extravagant consumption concept and lessons learned from, it has considerable historical reference.
文摘U.S. management consultancy firm Bain& Company has released a report showing in 2009 China’s luxury goods market swelled by nearly 12 percent, reaching $9.6 billion and accounting
