Subjects: Biology >> Botany >> Applied botany submitted time 2020-05-28 Cooperative journals: 《广西植物》
Abstract： In order to explore the influence of alpine grassland types and altitude on the growth and reproduction traits of Lamiophlomis rotate, random quadrat investigation and sample collection were conducted under three grassland types and three altitude gradients in Maqu, and the growth and reproduction traits were measured. The results were as followes: (1) The traits of above-ground parts were swamp meadow > hillside meadow > shrub meadow, and the traits of the under-ground parts were swamp meadow > shrub meadow > hillside meadow; (2) The traits were decreased with the increase of altitude; (3) In different grassland types and altitudes, there was a significant positive correlation between the sexual reproduction structure and plant size, but there was no correlation between the asexual reproduction and plant size; (4) In different grassland types and altitudes, there was no correlation between the two reproduction modes. These were concluded that: (1) The resource allocation method was affected by grassland types, which is the result of long-term adaptation to the environment; (2)The occurrence of sexual reproduction requires a certain amount of vegetative growth accumulation, while the asexual reproduction may be the inherent characteristics of plants, independent of plant size; (3) The asexual propagation of rhizome bud may occur after the destruction of the above ground rather than the active behavior. Whether the uncorrelation between the two propagation modes would be affected by other factors need further study.
Subjects: Agriculture, Forestry,Livestock & Aquatic Products Science >> Basic Disciplines of Agriculture submitted time 2017-11-07 Cooperative journals: 《中国生态农业学报》
Abstract：围栏陷阱(trap-barrier system, TBS)技术自2008 年起在我国许多省市进行应用性试验和推广, 已有的研究多是注重防治效果, 虽有多位作者设想该技术还可用于鼠情监测, 但尚少见针对性试验和全面的数据支 持。为研究直线形围栏陷阱系统(linear trap-barrier system, L-TBS)用于农田鼠情监测的科学依据, 探索L-TBS所获鼠情资料与常规性夹夜法的对应关系, 2015 年5—10 月在新疆博乐市玉米地进行了两种方法监测效果的对比试验。通过同一区域、不同地点、操作方式一致的3 组重复试验, L-TBS 监测的农田害鼠种类、种群数量动态与繁殖特征, 皆与夹夜法结果吻合: 鼠种组成百分比卡方检验, 小家鼠x2=1.50, 灰仓鼠x2=0.54, 均小于X20.01; 两种方法的繁殖特征相关性检测, 性比r=0.710 0, 怀孕率r=0.926 8, 睾丸下降率r=0.869 2, 繁殖指数r=0.940 0, 均显著正相关。而L-TBS 因能捕获幼体而更全面反映种群年龄结构; L-TBS 还能捕获夹夜法难以捕获的鼩鼱, 可用于防疫监测。由L-TBS 法(X)与夹夜法(Y)获得的优势种小家鼠捕获率极显著正相关, 回归方程y＝0.143 1+0.146 5x (d.f.＝42, r＝0.707 7, P＝0.000 0), 展示了其与夹夜法的关联性。研究证明: 在 6.67 hm2农田边设置60 m 长的L-TBS 可以达到鼠害防治与监测的目的, 比常规夹夜法具更省工、省力、安全, 具有可操作性强的优点; 而L-TBS 比矩形TBS 更便于机械化农事操作, 适于农田推广应用。
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