“植被指数”是对光合作用强度的反映。
在植被茂密，有着大量光合作用树叶的地区，该指数较高；
The index is high in areas where plants are dense, with plenty of photosynthesizing leaves.
铁、硼和钼肥能够促进牧草分蘖，提高叶面积指数和提高与杂草的竞争力，有利于牧草的光合作用和提高牧草质量。
Fe, b, mo fertilizer could promote forage tillering, enlarge LAI and strengthen competition ability with weeds, which favored photosynthesis and forage quality improvement.
忽略轴向的模式耦合以及包层模式之间的相互耦合作用，并认为折射率指数的调制只存在于纤芯中，建立了简化的长周期光纤光栅数学模型。
Then the simplified model for the LPFG is deduced with ignoring longitudinal coupling of modes and coupling of cladding modes themselves, and also assuming the modulation of refractive index exis...
忽略轴向的模式耦合以及包层模式之间的相互耦合作用，并认为折射率指数的调制只存在于纤芯中，建立了简化的长周期光纤光栅数学模型。
Then the simplified model for the LPFG is deduced with ignoring longitudinal coupling of modes and coupling of cladding modes themselves, and also assuming the modulation of refractive index exis...
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