Table 2 Cotton yield and yield component under different treatments during 2018 and 2019 growing seasons.
Treatments | 2018 | 2019 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Bolls no. (m2) | Boll weight (g) | Seed cotton yield (kg ha-1) | Lint percentage (%) | Lint yield (kg ha-1) | Bolls no. (m2) | Boll weight (g) | Seed cotton yield (kg ha-1) | Lint percentage (%) | Lint yield (kg ha-1) | |
Nitrogen fertilizer type | ||||||||||
Controlled-release urea (CRU) | 86.48 a | 6.42 a | 5549.94 a | 45.50 a | 2525.26 a | 80.94 a | 6.10 a | 4940.04 a | 45.63 a | 2253.98 a |
Urea | 81.93 b | 6.10 b | 5002.70 b | 45.51 a | 2276.93 b | 77.13 b | 5.74 b | 4431.00 b | 45.56 a | 2018.96 b |
Fulvic acid (FA) rate (kg ha-1) | ||||||||||
90 | 83.80 b | 6.20 b | 5202.16 b | 45.42 a | 2362.97 b | 77.93 b | 5.78 c | 4503.11 c | 45.67 a | 2056.51 c |
180 | 85.72 a | 6.37 a | 5463.91 a | 45.52 a | 2486.90 a | 80.88 a | 6.05 a | 4900.41 a | 45.69 a | 2234.07 a |
270 | 83.10 b | 6.21 b | 5162.90 b | 45.57 a | 2352.97 b | 78.30 b | 5.94 b | 4653.03 b | 45.53 a | 2118.83 b |
Nitrogen fertilizer type × FA rate interaction | ||||||||||
Control | 71.70 ed | 5.60 d | 4015.73 d | 45.42 a | 1824.13 d | 72.07 d | 5.61 d | 4045.79 d | 45.38 a | 1836.31 d |
CRU × FA90 | 85.72 ab | 6.34 b | 5435.08 ab | 45.41 a | 2468.44 ab | 78.67 c | 5.93 b | 4664.98 b | 45.69 a | 2131.49 b |
CRU × FA180 | 88.23 a | 6.52 a | 5752.64 a | 45.49 a | 2616.88 a | 83.40 a | 6.24 a | 5203.74 a | 45.57 a | 2371.48 a |
CRU × FA270 | 85.54 ab | 6.39 b | 5462.16 ab | 45.59 a | 2490.45 ab | 80.77 b | 6.13 a | 4951.39 ab | 45.62 a | 2258.96 ab |
Urea × FA90 | 81.97 bc | 6.07 c | 4969.25 c | 45.42 a | 2257.53 c | 77.20 cd | 5.62 d | 4341.24 c | 45.65 a | 1981.54 c |
Urea × FA180 | 83.23 b | 6.22 bc | 5175.22 b | 45.54 a | 2356.92 b | 78.37 c | 5.87 bc | 4597.09 bc | 45.61 a | 2096.66 bc |
Urea × FA270 | 80.70 c | 6.03 c | 4863.64 c | 45.55 a | 2215.49 c | 75.83 cd | 5.74 cd | 4354.67 c | 45.44 a | 1978.69 c |
Source of variance | ||||||||||
Nitrogen fertilizer type | < 0.0001 | < 0.0001 | < 0.0001 | 0.9547 | < 0.0001 | < 0.0001 | < 0.0001 | < 0.0001 | 0.5161 | < 0.0001 |
FA rate | 0.0004 | 0.0009 | 0.0002 | 0.6781 | 0.0009 | 0.0008 | 0.0017 | < 0.0001 | 0.5011 | 0.0001 |
Nitrogen fertilizer type × FA rate | 0.2877 | 0.3895 | 0.2851 | 0.9608 | 0.4161 | 0.0129 | 0.695 | 0.0251 | 0.6314 | 0.0323 |
