The leaf morphological and physiological evolution of Paphiopedilum was related to water and resource-conserving traits in the karst habitat.
兜兰的叶片形态结构和生理功能的进化与适应喀斯特地区匮乏的水肥条件有关。
It is a national measure for utilizing water resource, conserving soil and fertility and achieving high yield.
是合理利用水资源，保土、保肥，能蓄能排的旱地节水农业夺取作物高产的有效措施。
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