甜玉米穗不同部位对农药残留水平的影响。
Influence of various parts of sweet corn ears on pesticide residue levels.
作者信息
Yajima Tomonari, Fujita Masahiro, Iijima Kazuaki, Sato Kiyoshi, Kato Yasuhiro
机构信息
The Institute of Environmental Toxicology (IET), 4321 Uchimoriya-machi, Joso-shi, Ibaraki 303-0043, Japan.
出版信息
J Pestic Sci. 2017 May 20;42(2):52-57. doi: 10.1584/jpestics.D17-001.
Pesticide residue levels in various parts of sweet corn ears were analyzed. For this purpose, five pesticides were sprayed on corn in two different fields, and the harvested samples were separated into four portions, namely kernels, cobs, silks, and husks. Each of these portions was then separately analyzed. Pesticide residues were predominantly distributed in the silk and husk portions, which constituted ≥91% of the whole crop, whereas relatively minimal residues remained in the kernel and cob portions. Further, residue distributions in the silks and husks were found to differ between the two fields. The calculated residue levels in kernels with the cob and silk were obviously higher than the residue levels in the kernel alone (max. >62 times different). This result suggests that the silk portion could greatly affect pesticide residue levels in the edible portion of corn.
对甜玉米穗各部位的农药残留水平进行了分析。为此，在两块不同的田地里向玉米喷洒了五种农药，收获的样本被分成四份，即玉米粒、玉米芯、玉米须和玉米皮。然后对这些部分分别进行分析。农药残留主要分布在玉米须和玉米皮部分，这两部分占整个作物的比例≥91%，而玉米粒和玉米芯部分的残留相对较少。此外，发现两块田地中玉米须和玉米皮的残留分布有所不同。计算得出，带玉米芯和玉米须的玉米粒中的残留水平明显高于单独玉米粒中的残留水平（最大相差>62倍）。这一结果表明，玉米须部分可能会极大地影响玉米可食用部分的农药残留水平。
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