[Objective] This study aimed to scientifically improve the 1-deoxynojimycin （DNJ） yield of mulberry leaves in spring. [Method] ＂3414＂ experimental design was adopted to investigate the effects of different fertili...[Objective] This study aimed to scientifically improve the 1-deoxynojimycin （DNJ） yield of mulberry leaves in spring. [Method] ＂3414＂ experimental design was adopted to investigate the effects of different fertilizer application rates of nitrogen, phosphorus and potassium on the DNJ content in mulberry leaves. The regression relationship was further simulated with DNJ yield as the objective function and fertil- izer application rates of nitrogen, phosphorus and potassium as the regulatory factors. [Result] The results showed that nitrogen, phosphorus and potassium all have great effects on the DNJ content in mulberry leaves at different parts of mulberry tree （Morus alba）; the DNJ content in mulberry leaves increases with the increasing single-factor fertilizer application rate and reaches the maximum under N2P2K2 level; different fertilizer application rates and combinations of nitrogen, phosphorus and potassium can significantly affect the DNJ content in mulberry leaves; according to the simulated fertilizer effect function, the optimal economic yield of total DNJ in mul- berry leaves was 23.23 kg/hm^2, the recommended fertilization indicators were 286.11 kg/hm^2 N, 95.22 kg/hm^2 P2O5 and 159.62 kg/hm^2 K20. [Conclusion] After confirmation in productive practice, this optimal fertilization program can provide reference for the construction of mulberry plantation with high yield and high quality of DNJ.展开更多
[Objective] Effects of nitrogen amount and nitrogen form on 1-deoxynojimycin（DNJ）content in mulberry leaf was explored in order to provide a reference for improving DNJ content in mulberry leaf and its medicinal val...[Objective] Effects of nitrogen amount and nitrogen form on 1-deoxynojimycin（DNJ）content in mulberry leaf was explored in order to provide a reference for improving DNJ content in mulberry leaf and its medicinal value.[Method] Effects of nitrogen amount（NO-3-N and NH＋4-N）and nitrogen form（NO-3-N/NH＋4-N）on DNJ content in mulberry leaf were studied by changing nitrogen amount and nitrogen form in water culture solution.[Result] DNJ contents in mulberry leaf both increased at first and then decreased with the increase of nitrogen amount,furthermore compared with NH＋4-N,NO-3-N was more beneficial to the accumulation of DNJ;DNJ content in mulberry leaf obviously increased at first and then decreased with the decrease of NO-3-N/NH＋4-N,among them when its rate was 25/75,DNJ content reached the highest.[Conclusion] Proper nitrogen amount and nitrogen form could effectively improve the DNJ content in mulberry leaf.展开更多
Abstract In the research, five test groups were set, including urea at O, 120, 240, 360 and 480 kg/hm^2, respectively, and analysis was conducted on mulberry leaf yield and some characters of the quality in order to e...Abstract In the research, five test groups were set, including urea at O, 120, 240, 360 and 480 kg/hm^2, respectively, and analysis was conducted on mulberry leaf yield and some characters of the quality in order to establish utility functions of ap-plied N in mulberry gardens with different production purposes and to provide schemes of rational N fertilization. The results indicated that yield of mulberry leaf and content and yield of active nutritional substances in the leaves would be reduced either by insufficient or excessive N quantity. In addition, 240 kg/hm^2 of applied N significantly improved active nutritional substances in leaf and 360 kg/hm^2 of applied N significantly improved yields of mulberry leaf and active nutritional sub-stances. Therefore, utility functions of applied N quantity with leaf yield, DNJ content and yield were established accordingly. The optimal N quantity in mulberry gardens for sericulture is recommended 360 kg/hm^2 and the optimal N quantities in mulberry gardens for increase of yield and content of DNJ are 299.56 and 294.72 kg/hm^2, respectively.展开更多
S concentrations in samples of mulberry leaves and silkworm (Bombyx mori L.) cocoon shells and quality of cocoon taken from typical mulberry gardens of six provinces located in the lower to middle reaches of the Yangt...S concentrations in samples of mulberry leaves and silkworm (Bombyx mori L.) cocoon shells and quality of cocoon taken from typical mulberry gardens of six provinces located in the lower to middle reaches of the Yangtze River were analyzed by the method of applied biostatistics on sericulture to study the relationships between cocoon quality and S concentrations in mulberry leaves and cocoon shells. The results showed that two-power function relationships between concentration of sulfur in mulberry leaves and characters of cocoon quality were significant (R2 = 0.139*-0.329**, n = 24-29, a < 0). The range of optimum S concentrations in mulberry leaves was 1.90-2.49 g kg-1 (mean±SE = 2.10±0.15 g kg-1) for high quality of cocoon. There existed significant two-power function or positive linear relationships between S concentration in cocoon shell and characters of cocoon quality (R2 = 0.153*-0.458**, n = 24-29). The range of optimum concentrations of sulfur in cocoon shell was 1.51-1.61 g kg-1 for high quality of cocoon.展开更多
基金Supported by Crop Breeding Research Project of Sichuan Province of the 12th Five-Year Plan(2011JYGC10-027-02)Excellent Paper Fund from Sichuan Academy of Agricultural Sciences(No.2011LWJJ-008)~~
文摘[Objective] This study aimed to scientifically improve the 1-deoxynojimycin （DNJ） yield of mulberry leaves in spring. [Method] ＂3414＂ experimental design was adopted to investigate the effects of different fertilizer application rates of nitrogen, phosphorus and potassium on the DNJ content in mulberry leaves. The regression relationship was further simulated with DNJ yield as the objective function and fertil- izer application rates of nitrogen, phosphorus and potassium as the regulatory factors. [Result] The results showed that nitrogen, phosphorus and potassium all have great effects on the DNJ content in mulberry leaves at different parts of mulberry tree （Morus alba）; the DNJ content in mulberry leaves increases with the increasing single-factor fertilizer application rate and reaches the maximum under N2P2K2 level; different fertilizer application rates and combinations of nitrogen, phosphorus and potassium can significantly affect the DNJ content in mulberry leaves; according to the simulated fertilizer effect function, the optimal economic yield of total DNJ in mul- berry leaves was 23.23 kg/hm^2, the recommended fertilization indicators were 286.11 kg/hm^2 N, 95.22 kg/hm^2 P2O5 and 159.62 kg/hm^2 K20. [Conclusion] After confirmation in productive practice, this optimal fertilization program can provide reference for the construction of mulberry plantation with high yield and high quality of DNJ.
基金Supported by Key Technology Innovation Project of Sichuan Province(2008NC00365)~~
文摘[Objective] Effects of nitrogen amount and nitrogen form on 1-deoxynojimycin（DNJ）content in mulberry leaf was explored in order to provide a reference for improving DNJ content in mulberry leaf and its medicinal value.[Method] Effects of nitrogen amount（NO-3-N and NH＋4-N）and nitrogen form（NO-3-N/NH＋4-N）on DNJ content in mulberry leaf were studied by changing nitrogen amount and nitrogen form in water culture solution.[Result] DNJ contents in mulberry leaf both increased at first and then decreased with the increase of nitrogen amount,furthermore compared with NH＋4-N,NO-3-N was more beneficial to the accumulation of DNJ;DNJ content in mulberry leaf obviously increased at first and then decreased with the decrease of NO-3-N/NH＋4-N,among them when its rate was 25/75,DNJ content reached the highest.[Conclusion] Proper nitrogen amount and nitrogen form could effectively improve the DNJ content in mulberry leaf.
基金Supported by Special Fund of Modern Agricultural Industry Technology System(No.CARS-22)Special Fund of Major Industry Technology of Sichuan Economic and Trade Commission(No.2008NC00365)+1 种基金Excellent Paper Fund of Sichuan Academy of Agricultural Sciences(No.2011JYGC-LWJJ-07)Special Fund of Sichuan Financial Genetic Engineering(No.2011JYGC-QNJJ-021)~~
文摘Abstract In the research, five test groups were set, including urea at O, 120, 240, 360 and 480 kg/hm^2, respectively, and analysis was conducted on mulberry leaf yield and some characters of the quality in order to establish utility functions of ap-plied N in mulberry gardens with different production purposes and to provide schemes of rational N fertilization. The results indicated that yield of mulberry leaf and content and yield of active nutritional substances in the leaves would be reduced either by insufficient or excessive N quantity. In addition, 240 kg/hm^2 of applied N significantly improved active nutritional substances in leaf and 360 kg/hm^2 of applied N significantly improved yields of mulberry leaf and active nutritional sub-stances. Therefore, utility functions of applied N quantity with leaf yield, DNJ content and yield were established accordingly. The optimal N quantity in mulberry gardens for sericulture is recommended 360 kg/hm^2 and the optimal N quantities in mulberry gardens for increase of yield and content of DNJ are 299.56 and 294.72 kg/hm^2, respectively.
基金supported by the National Natural Science Foundation of China(No. 49771051), the Postdoctoral Fund of People's Government of Ji
文摘S concentrations in samples of mulberry leaves and silkworm (Bombyx mori L.) cocoon shells and quality of cocoon taken from typical mulberry gardens of six provinces located in the lower to middle reaches of the Yangtze River were analyzed by the method of applied biostatistics on sericulture to study the relationships between cocoon quality and S concentrations in mulberry leaves and cocoon shells. The results showed that two-power function relationships between concentration of sulfur in mulberry leaves and characters of cocoon quality were significant (R2 = 0.139*-0.329**, n = 24-29, a < 0). The range of optimum S concentrations in mulberry leaves was 1.90-2.49 g kg-1 (mean±SE = 2.10±0.15 g kg-1) for high quality of cocoon. There existed significant two-power function or positive linear relationships between S concentration in cocoon shell and characters of cocoon quality (R2 = 0.153*-0.458**, n = 24-29). The range of optimum concentrations of sulfur in cocoon shell was 1.51-1.61 g kg-1 for high quality of cocoon.
