The Experts below are selected from a list of 26016 Experts worldwide ranked by ideXlab platform

Feng Xumeng - One of the best experts on this subject based on the ideXlab platform.

  • Study on the effects of Citrate Acid-soluble potassium fertilizer in rice-wheat rotation system by pot experiment.
    Journal of Nanjing Agricultural University, 2014
    Co-Authors: Sun Guomei, Li Rong, Liao Wenqiang, Guo Jiuxin, Feng Xumeng
    Abstract:

    Potassium is involved in many important biochemical processes of plant. It plays an important role in improving crop quality,increasing lodging resistance and enhancing crop resistance to pests and diseases. Water-soluble potassium fertilizer resources are quite poor in our country resulting in large quantities of potassium fertilizer imported from foreign countries. However,the reserve of Citrate Acid-soluble potassium mineral widely existed. So it is very important to explore Citrate Acid-soluble potassium fertilizer to solve the problem of lacking of potassium resources in our country. To clarify the effects of Citrate Acid-soluble potassium fertilizer on rice-wheat rotation system,two parts of different amount of Citrate Acid-soluble potassium fertilizer and different ratio of Citrate Acid-soluble potassium fertilizer to water-soluble potassium fertilizer were conducted in pot experiment. The roles of Citrate Acid-soluble potassium fertilizer on the current season effect of wheat and the later season effect of rice were investigated. Furthermore,the wheat and rice parameters of the biomass,crop yield,potassium concentration in different crop positions,as well as potassium accumulation,potassium utilization efficiency and soil available K were analyzed to investigate the fertilizer effect of different treatments. The results obtained were as follows: 1) The wheat and rice yield,biomass and potassium accumulation were significantly enhanced as the Citrate Acid-soluble potassium fertilizer application amount increased. When applying the same amount of water-soluble potassium fertilizer( WP100%) and Citrate Acid-soluble potassium fertilizer( CP1),the effect of WP100%was better than CP1 in the wheat season,whereas the CP1 was better in the rice season. When the application of Citrate Acid-soluble potassium fertilizer was 0. 225 g·kg-1( CP3 /2) and 0.300 g·kg-1( CP2),the annual potassium accumulation increased 74% and 114%,respectively,as compared with control. Furthermore,the annual production of rice and wheat increased 31% and 33%,respectively. Therefore,application of a high level of potassium can cause a luxury absorbed. The application of 0. 150-0. 225 g·kg-1Citrate Acid-soluble potassium fertilizer was needed to replace the water-soluble potassium fertilizer. 2) When applying equal amount of potassium fertilizer,different ratio of Citrate Acid-soluble potassium fertilizer to water-soluble potassium fertilizer could increase the crop biomass,crop yield,potassium content,potassium accumulation,the potassium utilization efficiency and soil available K content,as compared to control. The best ratio of Citrate Acid-soluble potassium fertilizer to water-soluble potassium fertilizer was 1 ∶1( WP50%).Conclusions: Citrate Acid-soluble potassium fertilizer could replace or partly replace the water-soluble potassium fertilizer. This study could provide scientific basis for promoting the use of Citrate Acid-soluble potassium fertilizer in large area.

Liu Tin - One of the best experts on this subject based on the ideXlab platform.

  • Synthesis of Trioctyl Citrate Catalyzed by SO_4~(2-)/Fe/Al-MMT Solid Acid
    Bulletin of the Chinese ceramic society, 2013
    Co-Authors: Liu Tin
    Abstract:

    Mixed Fe /Al pillared montmorillonite(Fe /Al-MMT) was prepared by montmorillonite(MMT)with mixed Fe / Al pillaring agents synthesized by copolymerization,and were modified by H2SO4 to achieve the SO2-4/Fe/Al-MMT solid super Acid. The catalytic activity of solid Acid was tested for the synthesis of trioctyl Citrate. The experimental results showed that the yield of trioctyl Citrate was 96. 6% under the conditions: the Citrate Acid∶ octanol = 1∶ 5(mol∶ mol),the dosage of catalyst was 10% of Citrate Acid(0. 12 g),the reaction time was 5 h at 160 ℃. Compared to the weight of SO2-4/Fe-MMT,the weight of SO2-4/Fe/Al-MMT decreased by 5%.

Chen Hu-kui - One of the best experts on this subject based on the ideXlab platform.

  • Synthesis of Trioctyl Citrate Catalyzed by SO_4~(2-)/Fe-MMT Solid Super Acid
    Bulletin of the Chinese ceramic society, 2011
    Co-Authors: Chen Hu-kui
    Abstract:

    An iron pillared montmorillonite(MMT) is prepared by ion exchange,and is modified by H2SO4 to achieve the SO2-4/Fe-MMT solid super Acid.It is characterized by IR and XRD.Trioctyl Citrate is synthesized using SO2-4/Fe-MMT as catalyst.The results indicate that temperature of the reaction is 160 ℃,the molar ratio of Citrate Acid to octanol is 1∶ 4,the weight of catalyst is 15% of Citrate Acid and the reaction time is 4 h,the yield of trioctyl Citrate has reached 97.0%.

Sun Guomei - One of the best experts on this subject based on the ideXlab platform.

  • Study on the effects of Citrate Acid-soluble potassium fertilizer in rice-wheat rotation system by pot experiment.
    Journal of Nanjing Agricultural University, 2014
    Co-Authors: Sun Guomei, Li Rong, Liao Wenqiang, Guo Jiuxin, Feng Xumeng
    Abstract:

    Potassium is involved in many important biochemical processes of plant. It plays an important role in improving crop quality,increasing lodging resistance and enhancing crop resistance to pests and diseases. Water-soluble potassium fertilizer resources are quite poor in our country resulting in large quantities of potassium fertilizer imported from foreign countries. However,the reserve of Citrate Acid-soluble potassium mineral widely existed. So it is very important to explore Citrate Acid-soluble potassium fertilizer to solve the problem of lacking of potassium resources in our country. To clarify the effects of Citrate Acid-soluble potassium fertilizer on rice-wheat rotation system,two parts of different amount of Citrate Acid-soluble potassium fertilizer and different ratio of Citrate Acid-soluble potassium fertilizer to water-soluble potassium fertilizer were conducted in pot experiment. The roles of Citrate Acid-soluble potassium fertilizer on the current season effect of wheat and the later season effect of rice were investigated. Furthermore,the wheat and rice parameters of the biomass,crop yield,potassium concentration in different crop positions,as well as potassium accumulation,potassium utilization efficiency and soil available K were analyzed to investigate the fertilizer effect of different treatments. The results obtained were as follows: 1) The wheat and rice yield,biomass and potassium accumulation were significantly enhanced as the Citrate Acid-soluble potassium fertilizer application amount increased. When applying the same amount of water-soluble potassium fertilizer( WP100%) and Citrate Acid-soluble potassium fertilizer( CP1),the effect of WP100%was better than CP1 in the wheat season,whereas the CP1 was better in the rice season. When the application of Citrate Acid-soluble potassium fertilizer was 0. 225 g·kg-1( CP3 /2) and 0.300 g·kg-1( CP2),the annual potassium accumulation increased 74% and 114%,respectively,as compared with control. Furthermore,the annual production of rice and wheat increased 31% and 33%,respectively. Therefore,application of a high level of potassium can cause a luxury absorbed. The application of 0. 150-0. 225 g·kg-1Citrate Acid-soluble potassium fertilizer was needed to replace the water-soluble potassium fertilizer. 2) When applying equal amount of potassium fertilizer,different ratio of Citrate Acid-soluble potassium fertilizer to water-soluble potassium fertilizer could increase the crop biomass,crop yield,potassium content,potassium accumulation,the potassium utilization efficiency and soil available K content,as compared to control. The best ratio of Citrate Acid-soluble potassium fertilizer to water-soluble potassium fertilizer was 1 ∶1( WP50%).Conclusions: Citrate Acid-soluble potassium fertilizer could replace or partly replace the water-soluble potassium fertilizer. This study could provide scientific basis for promoting the use of Citrate Acid-soluble potassium fertilizer in large area.

Kai Zhu - One of the best experts on this subject based on the ideXlab platform.

  • development and validation of a new soil universal extractant 0 02 molar strontium chloride
    Communications in Soil Science and Plant Analysis, 2006
    Co-Authors: Jiabao Zhang, Weiqin Xing, Wei Chen, Kai Zhu
    Abstract:

    Abstract In this experiment, when the strontium chloride–Citrate Acid extractant (0.02 M SrCl2–0.05 M Citrate) was used for extraction of calcareous soils with calcium carbonate greater than 70 g kg−1, the filtrate was turbid. Furthermore, white precipitation appeared when this extract was used for phosphorus determination with the Murphy and Riley method. As the concentration of Citrate in strontium chloride–Citrate Acid extractant decreased to 0.025 or 0 M, the filtrate became clean. Further experiments indicated that the 0.02 M SrCl2 extractant could be used as a universal extractant for soil nitrate+nitrite and potassium; the extracted nitrate+nitrite and potassium significantly correlated with nitrogen and potassium phytoavailability, respectively, determined with ryegrass pot experiment (P<0.05). Thus, the 0.02 M SrCl2 was recommended as a universal extractant for soil nitrate+nitrite and potassium.

  • Development and Validation of a New Soil Universal Extractant: 0.02 Molar Strontium Chloride
    Communications in Soil Science and Plant Analysis, 2006
    Co-Authors: Jiabao Zhang, Weiqin Xing, Wei Chen, Kai Zhu
    Abstract:

    Abstract In this experiment, when the strontium chloride–Citrate Acid extractant (0.02 M SrCl2–0.05 M Citrate) was used for extraction of calcareous soils with calcium carbonate greater than 70 g kg−1, the filtrate was turbid. Furthermore, white precipitation appeared when this extract was used for phosphorus determination with the Murphy and Riley method. As the concentration of Citrate in strontium chloride–Citrate Acid extractant decreased to 0.025 or 0 M, the filtrate became clean. Further experiments indicated that the 0.02 M SrCl2 extractant could be used as a universal extractant for soil nitrate+nitrite and potassium; the extracted nitrate+nitrite and potassium significantly correlated with nitrogen and potassium phytoavailability, respectively, determined with ryegrass pot experiment (P