Table 1 Nitrogen uptake, nitrogen agronomy efficiency (NAE) and nitrogen use efficiency (NUE) of cotton plant after harvested in 2019.

From: Effects of controlled-release urea combined with fulvic acid on soil inorganic nitrogen, leaf senescence and yield of cotton

Treatments

Nitrogen uptake (kg ha-1)

NAE (kg kg-1)

NUE (%)

Nitrogen fertilizer type

Controlled-release urea (CRU)

262.11 a

9.51 a

37.54 a

Urea

256.78 b

8.53 b

34.60 b

Fulvic acid (FA) rate (kg ha-1)

90

258.83 a

8.97 a

35.95 b

180

260.00 a

9.17 a

36.26 a

270

259.50 a

8.92 a

36.02 b

Nitrogen fertilizer type × FA rate interaction

Control

194.2 c

-

-

CRU × FA90

261.3 a

9.4 a

37.5 a

CRU × FA180

262.7 a

9.7 a

37.7 a

CRU × FA270

262.5 a

9.5 a

37.5 a

Urea × FA90

256.4 b

8.5 b

34.4 b

Urea × FA180

257.8 b

8.6 b

34.9 b

Urea × FA270

256.1 b

8.4 b

34.5 b

Source of variance

Nitrogen fertilizer type

 < 0.0001

 < 0.0001

 < 0.0001

FA rate

0.3135

0.206

0.0072

Nitrogen fertilizer type × FA rate

0.898

0.87

0.2466

  1. Means followed by different lowercase letters in the same column were significantly different based on analyses with ANOVAs followed by Duncan tests (P < 0.05).
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