Under the same irrigation quota, for the W1 treatment, the total phosphorus content in potato stems showed an increasing trend with the increase of nitrogen application rate; while for the W2 and W3 treatments, it first increased and then decreased.
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Effects of water-nitrogen interaction on photosynthetic-stoichiometric balance in potato: a leaf physiological and ecological perspective.
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The sentences
Under the same nitrogen application rate, with the increase of irrigation quota, the total phosphorus content in potato stems also showed a trend of first increasing and then decreasing.