Effects of Fertilizer Application on Growth and Stoichiometric Characteristics of Nitrogen, Phosphorus, and Potassium in Balsa Tree (<i>Ochroma lagopus</i>) Plantations at Different Slope Positions.

The branch K/P ratio peaked under the F3 treatment at 120 and 150 days, showing significant increases of 117.5% and 41.9%, respectively, compared to CK ( p < 0.05), but exhibited a decreasing trend by 180 days, with the F4 treatment showing a significant decrease of 37.6% compared to CK ( p < 0.05). 3.4.

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In this study, it was found that fertilization could promote the growth of Ochroma lagopus , and the height of trees in both upper and lower slope positions showed an increasing trend with the increase in fertilizer application, which is similar to the findings of Kulmann et al.

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