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中文摘要：
岩石养分不易被植物根系吸收利用，生长于其表面的岩生植物依靠盐劈和生物化学作用加速岩石风化使养分呈离子状态释放出来，维持自身对养分的需求。浅析了植物根系分泌物活化岩石养分中的P、K和其它营养元素的可能机制，论述岩生植物克服和缓解养分胁迫造成的不良影响及适应养分贫瘠环境的机理；同时提出鉴定岩生植物活化岩体养分的特定根系分泌物，揭示其分子机理，并应用定量模拟模型来表达RE对岩石养分活化作用，具有重大的科学意义。
英文摘要：
Most of rock nutrition is indissolubility and is not easily absorbed by rock plants growing on its surface; these plants have to rely on its salt - hack and biochemistry function to accelerating weathering of rock,at the same time, rock release nutrient in ion state to meet the needs of plants growing; The paper is focused on analyzing the mechanism of root exudates activating P,K and other nutrient elements of rock , discussing plants ＇ growing mechanism on arid rock and overcoming or relaxing the blight of nutrients intimidation , and bringing forward the significance of identifying a special type of RE which can activate rock nutrients and elucidating the molecular mechanism and applying model to the research on the process of RE activating rock nutrients in science.
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