Effects of irrigation frequency on root growth, nutrients accumulation, yield, and water use efficiency of <i>Panax notoginseng</i> under micro-sprinkler irrigation.

The trends of soil alkali hydrolyzed nitrogen and available phosphorus were both ‘S’ shaped, with an increasing trend from March 2017 to the seedling stage, a decreasing trend from the seedling stage to the fruiting stage, and an increasing trend from the fruiting stage to the period of the root growth stage.

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