Table 5 Parameter estimates by year and cultivation system for the four-parameter logistic model (Equation 1) characterizing the influence of the duration of weed interference on the relative seed cotton yield
From: Cultivation system influenced the critical period for weed control in cotton field
Cultivation system | B | C | D | ED50 (DAE††) | R2 | ||
|---|---|---|---|---|---|---|---|
Ultra-narrow row | 2021 | Weed-free | -8.66 (3.55a) | 45.4(5.29) | 101 (6.29) | 57.6(6.67) | 0.97 |
2021 | Weed-interference | 8.34(1.18) | 44.48(2.14) | 99.8(2.17) | 41.9(2.04) | 0.99 | |
2022 | Weed-free | -5.92(1.22) | 48.5 (2.67) | 100(3.65) | 47.9(4.19) | 0.99 | |
2022 | Weed-interference | 11.6(4.71) | 46.72 (7.72) | 98.7 (5.63) | 40.1(4.23) | 0.97 | |
Conventional | 2021 | Weed-free | -5.30(1.83) | 45.24(6.62) | 100.06(4.23) | 49.41(7.77) | 0.98 |
2022 | Weed-interference | 5.83(1.16) | 48.13(2.22) | 100.4(2.65) | 34.23(2.52) | 0.997 | |
2021 | Weed-free | -4.31(1.47) | 43.6(3.40) | 102.9(5.64) | 33.4(4.71) | 0.99 | |
2022 | Weed-interference | 9.84(5.89) | 48.21(7.06) | 99.35(4.85) | 71.56(8.78) | 0.98 |