玉米营养成分时空动态

Temporal and spatial variations of chemical constituents in maize

研究了玉米营养成分时空动态变化 .结果表明 ,随着玉米生育期的推进 ,玉米籽粒的总淀粉、粗蛋白和粗脂肪的含量逐渐升高 ;而茎、叶的粗蛋白、粗脂肪含量逐渐下降 ,中性洗涤纤维、酸性洗涤纤维和酸性洗涤木质素含量逐渐升高 .茎、叶粗蛋白含量下降的幅度大于籽粒粗蛋白含量上升幅度 .同时 ,玉米植株上部叶片的粗蛋白含量高于下部叶片 ,而中性洗涤纤维、酸性洗涤纤维和酸性洗涤木质素含量低于下部叶片 .茎上部粗蛋白含量高于下部 ,中性洗涤纤维、酸性洗涤纤维和酸性洗涤木质素含量低于下部 .

Study on the temporal and spatial variations of chemical constituents in maize showed that with the development of maize,the contents of total starch,crude protein and crude lipid in its kernel increased,while those of crude protein and crude lipid in its leaf and stem decreased.The content of fiber extracted by neutral agent and that of fiber and lignin in leaves and stems increased.The crude protein content of the top leaf was higher than that of the basal leaf,while the content of fiber extracted by neutral agent and that of fiber and lignin in the top leaf were lower than those of the basal leaf.The crude protein content of the top stem was higher than that of the basal stem,while the content of the fiber extracted by neutral agent and that of the fiber and lignin in the top stem were lower than those of the basal stem.