Hilton H W, Nomura N S, Kameda S S, Yauger W L
Arch Environ Contam Toxicol. 1976;4(4):385-94. doi: 10.1007/BF02221036.
Absorption of 14C-labeled herbicides from nutrient culture solution through the roots of sugarcane plants (Saccharum spp. hybrids) resulted in three major types of distribution. Labeled residues from atrazine, ametryne, and metribuzine moved easily through the xylem to the green leaves and were deposited mainly at the leaf margins and tip. Senescence and leaf abscission removed most of the deposit from the plant. Picloram translocated rapidly into the leaves, but appeared to recycle from older to younger leaves with only small portions remaining in the senescent leaves. Asulam and pentachlorophenol (PCP) were absorbed by the roots; residues did not pass into the xylem and remained fixed in the roots. Foliar additions of labeled herbicides and growth regulators generally showed only minor absorption and translocation within the leaf. Weathering processes and volatility during a 6- to 12-week period left variable amounts of residue, characteristic of individual compounds, absorbed at the treated sites.
14C标记的除草剂从营养液通过甘蔗植株（甘蔗属杂交种）的根部吸收后，产生了三种主要的分布类型。阿特拉津、莠灭净和嗪草酮的标记残留物很容易通过木质部转移到绿叶中，主要沉积在叶缘和叶尖。衰老和落叶使植株上的大部分沉积物被去除。毒莠定迅速转移到叶片中，但似乎从老叶循环到幼叶，只有一小部分残留在衰老叶片中。磺草灵和五氯苯酚（PCP）被根部吸收；残留物没有进入木质部，而是固定在根部。在叶片上添加标记的除草剂和生长调节剂，通常在叶片内仅表现出少量的吸收和转移。在6至12周的时间里，风化过程和挥发性使处理部位吸收了不同数量的、具有各化合物特征的残留物。
