USDA-ARS Center for Grain and Animal Health Research , 1515 College Avenue, Manhattan, Kansas 66502-2736, United States.
J Agric Food Chem. 2013 Jun 19;61(24):5715-9. doi: 10.1021/jf401179n. Epub 2013 Jun 5.
Cover crop treatments and nitrogen (N) fertilization rates were investigated for their impact on sorghum grain quality attributes. Sorghum was planted in field plots treated with differing cover cropping systems and fertilization rates. The size (weight and diameter) and hardness of the kernels were influenced by both the cover crop and N rates. The protein content increased as the N rate increased and also with the addition of cover crops to the system. The protein digestibility values and starch granule size distributions were not affected by N rate or the cover cropping treatments. Soil properties were tested to determine relationships with grain quality attributes. The utilization of cover crops appears to increase the protein content without causing a deleterious effect on protein digestibility. The end-product quality is not hampered by the use of beneficial cropping systems necessary for sustainable agriculture.
研究了覆盖作物处理和氮（N）施肥率对高粱籽粒品质属性的影响。高粱种植在不同覆盖作物系统和施肥率处理的田间小区中。籽粒的大小（重量和直径）和硬度受到覆盖作物和 N 率的双重影响。随着 N 率的增加和系统中添加覆盖作物，蛋白质含量增加。蛋白质消化率值和淀粉颗粒大小分布不受 N 率或覆盖作物处理的影响。测试了土壤特性以确定与谷物品质属性的关系。利用覆盖作物似乎可以增加蛋白质含量，而不会对蛋白质消化率产生有害影响。最终产品质量不会因使用可持续农业所需的有益作物系统而受到阻碍。
