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Effect of ratooning process on the engineering properties of NERICA rice varieties

机译：季过程对工程的影响新稻水稻品种的性质

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Rice ratooning is the practice of harvesting grain from tillers originating from the stubble of previously harvested crop. Comparative assessment of the engineering properties of main and ratooned NERICA rice varieties was investigated in this study. The length, width, thickness, arithmetic mean diameter, geometric mean diameter, equivalent diameter and surface area ranged from 8.21 to 10.62 mm, 2.31 to 3.60 mm, 1.67 to 2.28 mm, 13.10 to 22.67 mm, 3.26 to 3.87 mm, 6.35 to 9.98 mm, 23.15 to 42.02%, 34.20 to 51.31 mm and from 0.35 to 0.48 mm(2), respectively. Bulk density, true density, porosity, thousand grain weight and volume ranged from 0.63 to 1.14 g/cm(3), 0.55 to 0.67 g/cm(3), 1.48 to 45.91%, 21.66 to 27.41 g and from 0.023 to 0.031 mm(3), respectively. Coefficient of static friction on polished wood, plywood, metal and glass ranged from 0.35 to 0.47, 0.34 to 0.44, 0.26 to 0.34 and 0.14 to 0.21, respectively. Filling and emptying angle of repose ranged from 34.79 to 42.00 and from 46.57 degrees to 67.74 degrees, respectively. There were significant differences (P< 0.05) in the physical properties of the main and ratooned rice grains except bulk density, filling and emptying angle of repose. This study concluded that significant varietal differences existed among the different rice varieties and that the engineering properties of the main NERICA rice were significantly different from the ratooned crops.
机译：稻季的实践收获粮食从分蘖来自的碎秸之前收割作物。主要工程性质的截根苗NERICA水稻品种进行了研究在这项研究中。算术平均直径、几何平均数直径、当量直径和面积范围从8.21到10.62毫米,2.31 - 3.60毫米,1.67到2.28毫米,13.10到22.67毫米,3.26到3.876.35毫米,9.98毫米,34.20到23.15到42.02%51.31毫米,从0.35到0.48毫米(2),分别。孔隙度、千粒重和体积不等从0.63到1.14 g / cm(3), 0.55 - 0.67克/厘米(3),1.48至45.91%,21.66到27.41 g和0.023分别为0.031毫米(3)。静态摩擦抛光木材、胶合板、金属和玻璃范围从0.35到0.47,0.34,0.44,分别为0.26 ~ 0.34和0.14 ~ 0.21。填充和排空休止角不等34.79到42.00和46.57度至67.74度,分别。物理性质的差异(P < 0.05)主要和截根苗米粒除了散装密度、填充和排空休止角。本研究得出的结论是,重要的品种差异在不同的大米品种的工程性质主要NERICA水稻有显著不同从截根苗作物。

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