The morphology, speciesfrequency, spore density and natural infection rate of the VAM fungi in tea gardens were studied in the southern parts of Henan province.
对豫南茶园VA菌根真菌形态、种类、种群频度、孢子密度及自然侵染率进行观察与测定。
2
Responding to changes in the CF echo's frequency, bats of some species correct in flight for the direction and velocity of their moving prey.
有些种类的蝙蝠会根据回声频率的变化来调整向猎物移动的方向和速度。
3
He says it is possible to detect different species of mosquito because their wings beat with a distinctive frequency.