Bolick M R
University of Nebraska State Museum, Lincoln 68588-0514.
Nebr Med J. 1991 Jun;76(6):171-4.
Pollen counts in 1988, 1989, and 1990 revealed 14 different tree pollen types. The main tree pollination season in Lincoln extends from late February or early March through the end of May. First linden and then pine and juniper extend the trees through October. The sequence of flowering for the plants is similar to that found in other regions of the country. The highest counts (peaks of ca. 1000 grains/m3) are in March, April, and May when the largest number of trees are in bloom. Counts fall through June (highest ca. 300 grains/m3) and July (highest at ca. 35 grains/m3) when grasses and some weeds are flowering.
1988年、1989年和1990年的花粉计数显示有14种不同的树木花粉类型。林肯市主要的树木授粉季节从二月下旬或三月上旬一直持续到五月底。先是菩提树，然后是松树和杜松，整个十月都有树木开花。这些植物的开花顺序与该国其他地区相似。花粉计数最高值（约1000粒/立方米的峰值）出现在三月、四月和五月，此时大量树木开花。随着六月（最高约300粒/立方米）和七月（最高约35粒/立方米）草类和一些杂草开花，花粉计数下降。
