Study on physical characteristics of buckwheat Fagopyrum esculentum Moench seeds

Transcription

1 Vol. 2 No. 7 Jul DOI /j. issn Study on physical characteristics of buckwheat Fagopyrum esculentum Moench seeds 2 LI Jin-cai ZHAO Xi-heng 2 ZHAO Jian-cheng GUO Hui-min WANG Chao School of Chemical Engineering and Technology Tianjin University Tianjin China 2. School of Environmental Science and Engineering Tianjin University Tianjin China. Chinese Academy of Agricultural Mechanization Science Beijing 0008 China 5 2% respectively. In addition the thickness of seed shells and the gaps 0 between shells and kernels were found to be about 0. 8 and % ~. 4%. 8 ~ 5. 0 mm 90% mm and the. seed kernel hardness was measure to be kg. L * a * b * Therefor different buckwheat species showed relatively large differences 27. ~ 7. 2 g 578 ~ ~ in their seed moisture percentage thousand grain weight volume weight 795 kg /m g /cm of seed and kernel weight percentage of shell and kernel accounted for seeds clearance between shell and kernel of seeds and seed kernel hardness. Consequently the commonality and specificity in seed physical. 8% ~ 9. 2% 80. 8% ~ 86. 2% 0. 8 mm ~ 0. 2 mm characteristics among the different species might provide us some valuable. 07 ~. 26 kg information for the researches of the techniques and the adjustment of production process technologies in buckwheat hulling. Keywords buckwheat seed color specific weight clearance between shell and kernel kernel hardness Abstract To investigate the physical characteristics of buckwheat Fagopyrum esculentum Moench seeds ten physical characteristics of five Fagopyrum esculentum Moench were researched on their seeds shells and kernels. The results showed that buckwheat seed moisture percentage was. 6% -. 4% and the size of more than 90% of buckwheat seed grains was mm. The color values of L * a * and b * hm in kernels were about. 8 times. 7 times and 2. 6 times higher than those in seeds respectively. And then the thousand grain weight of buckwheat seeds and the volume weights of seeds and kernels were measured to be g kg /m and kg /m respectively. Moreover specific 0 4 t weight of seeds shells and kernels were also valuated to be about. g / cm 0. 6 g /cm and. g /cm and the weight percentage of shell and kernel accounted for seeds was. 8% % and 80. 8% lijincai@ tju. edu. cn

2 min 5 6 l A B C D % E A B = 00% 6 C D E JA2002 mm DHG-9055A NR-45 mm PXS GY kg 500 g ~ 6 h SPSS g 9. 0 % = - ± Duncan 00% P < g mm 2. < ~ ~ ~ 5. 0 > 5. 0 mm 2 % = 00% 2.. L * a * b * 5 Φ = 9. 5 cm 5 L * a * b * g g = mm 4. 6 ~ 5. 0 mm 20% 000 ml 00 ml 90% <. 8 mm > 5. 0 mm ml 5% 4 kg /m = 000 ml g 000 ml 400 ml 50 g 000 ml 700 ml 5 g /cm % ~. 4% A B C D E B D E C D ~ 4. 6 mm 0%. 8 ~ = 5 5%.. 7 Figure Seed moisture percentage in different 00 g 2

3 2 7 2 Figure 2 Percentage of various seed granularity levels in different 8% 2 0%. 8 ~ 5. 0 mm 2. L * ~ 6. 5 A C E B A C D E D E L * 57. ~ A D B D E C A B D E L *. 8 a * ~4. 85 B C D E a * 7. 2 ~8. 26 A B C D E a *. 7 b * ~ 9. 5% b * 2. 2 ~25. 6 B L * a * b * A C D C D E A D b * % L * a * b * L * a * b * b * Figure ~ 7. 2 g A D E B C D E C D E ~ 698 kg /m A B C D E C 5% D E D E ~ 795 kg /m A D E B A C D E C D E Figure Color L * a * and b * values of seed and kernel in different Figure 5 5% 4 Thousand grain weight in different Volume weight of seed and kernel in different

4 g /cm 0. 6 g /cm. g /cm. 0 g /cm a 5% 8 Figure 8 Seed shell thickness in different a 5% Figure 6 6 Specific weight of seed shell and kernel in different % ~ 9. 2% A B C D E A C D B 80. 8% ~ 86. 2% A E B C D E C D E % mm ~ 0. 2 mm A B ~. 26 kg B D ~. 82 kg Figure 9 Clearance between shell and kernel of seeds in different 5% 5% 0 7 Figure 0 Seed kernel hardness in different Figure 7 Weight percentage of shell and kernel accounted for seed in different 79 4

5 s J ~ 500 r /min 525 r 4. 6QH-600 J. 20 s J P J D D. 2 Adams ~ 0. ADAMS D. 50 r /min 400 ~ 425 r /min s. Pro /E ADAMS 40 J J J a structured design approach toward balancing J. Journal of Mechanical Design J J EDEM J Demeulenaere B Berkof R S. Improving machine drive dynamics 6. J % kg J J KALINOVA J VRCHOTOVA N. The influence of organic and conventional crop management variety and year on the yield and fla-. 8 ~ 5. 0 mm 90% L * a * b * vonoid level in common buckwheat groats J. Food Chemistry SOBHANI M R RAHMIKHDOEV G MAZAHERI D et al. Effects of sowing date cropping pattern and nitrogen on CGR yield and yield component summer sowing buckwheat Fagopyrum esculentum Moench J. Journal of Applied Environmental and Biological Sciences J. 8. J J J J J