Aeration Alleviated the Adverse Effects of Nitrogen Topdressing Reduction on Tomato Root Vigor, Photosynthetic Performance, and Fruit Development.

Additionally, the analysis of variance results ( Table 1 ) showed that both the aeration ratio and nitrogen topdressing level exhibited highly significant ( p < 0.01) effects on tomato root vigor at the flowering stage and fruit expanding stage.

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However, crop yields usually show a decreasing trend with the decline in the fertilizer application amount.

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With the same nitrogen topdressing level, the leaf Pn showed an increasing trend with the increase in the aeration ratio—the leaf Pn for treatments with an aeration ratio of 10% increased by 37–54% compared with the non-aeration treatment.

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