通过摄影与数字图像处理相结合的方法分析了1999年北京山区典型植被覆盖度的季节动态变化规律。
How the typical vegetation coverage changed with time in the mountainous area of Beijing in 1999 is studied after processing the photos taken in field.
通过对夏玉米和冬小麦生长季节期间土壤水动态观测试验，探讨了地下水浅埋条件下土壤水动态的变化规律。
A field experiments was conducted to study soil moisture and water potential changes in farmlands with a shallow water table during summer maize and winter wheat seasons.
羊草群落土壤呼吸的季节变化规律与地上绿色体生物量的季节动态同步。
The rule of seasonal change of soil respiration synchronized with that of the aboveground blue biomass.
羊草群落土壤呼吸的季节变化规律与地上绿色体生物量的季节动态同步。
The rule of seasonal change of soil respiration synchronized with that of the aboveground blue biomass.
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