نتایج جستجو برای: potamogeton berchtoldii
تعداد نتایج: 310 فیلتر نتایج به سال:
In the South, most nursery managers have relied on methyl bromide for weed control in hardwood seedbeds. When methyl bromide is no longer available, handweeding times will likely increase unless management regimes adapt to the change. Some nursery managers will increase use of both sanitation practices and herbicides. Although several herbicides are registered for use on hardwoods, some can inj...
??????????????????????????????????????????????????????.2016?7????????????????????????????2011???????????????????????1980s?????70%??????1960s?????Ottelia acuminata????????Stuckenia pectinata??????Najas marina???????????Potamogeton maackianus??????Ceratophyllum demersum??????Vallisneria natans?.???????????0~2.5 m???????????????Trapa maximowiezii????????????????????2.5~4 m?????????????????????????...
Reproductive allocation is a key process in the plant life cycle and aquatic plants exhibit great diversity in their reproductive systems. In the present study, we conduct a field investigation of three aquatic macrophytes: Stuckenia pectinata, Myriophyllum spicatum, and Potamogeton perfoliatus. Our results showed that widespread species, including S. pectinata and M. spicatum had greater plast...
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