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自装载美国大豆的外轮货舱中取样,研究进口美国大豆携带杂草和杂质的含量关系:取样量为5 kg/1 000 t,是能反映进口大豆中杂草和杂质含量关系的最低取样量;把进口美国大豆杂质含量划分为<1.5%、1.5%~2.0%和>2.0%3个区间,其携带杂草含量和种类与杂质含量呈显著的正相关;进口大豆中携带杂草含量高的,检出频率也相对高,但检出的杂草总种类数少于杂草含量低的;杂草含量低的,检出频率也相对低,但检出的杂草总种类数多于杂草含量高的。
Sampling from the outer cargo compartment loaded with American soybeans to study the relationship between the content of weeds and impurities carried by imported U.S. soybeans: the sampling volume is 5 kg / 1,000 t, which is the lowest sampling quantity that can reflect the content of weeds and impurities in imported soybeans; The content of imported soybean in the United States was divided into three ranges of <1.5%, 1.5% ~ 2.0% and> 2.0%. The content and types of the introduced weeds were significantly and positively correlated with the content of impurities. The imported soybean with high content of weeds , But the detection frequency was relatively high, but the total number of weeds detected was less than that of weeds; the weeds were low, the detection frequency was relatively low, but the total number of detected weeds was more than that of High grass content.