Table 3. Total relative yield change (%) in response to climate variables during the cool and warm cropping seasons in the 1925–1944, 1945–1983, and 1996–2019 time periods.
| 1925-1944 | 1945–1983 | 1996–2019 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cool cropping season | Warm cropping season | Cool cropping season | Warm cropping season | Cool cropping season | Warm cropping season | |||||||
| Climate variable | Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD |
| ΔT | 5.2 | 6.8 | −2.2 | 1.3 | 0.5 | 0.9 | −2.1 | 1.6 | −1.4 | 0.9 | −0.2 | 2.7 |
| ΔDTR | 10.8 | 7.2 | 1.1 | 1.6 | 1.6 | 2.3 | 1.0 | 3.1 | −9.6 | 3.4 | 3.5 | 1.7 |
| ΔR | 3.5 | 3.2 | 1.1 | 0.6 | 1.0 | 0.8 | 1.2 | 1.6 | −0.7 | 0.5 | 1.6 | 0.9 |
| ΔS | 0.2 | 0.2 | 5.7 | 3.7 | −0.4 | 0.3 | −2.3 | 1.1 | 0.5 | 0.2 | 2.3 | 1.4 |
Note:
ΔT, ΔDTR, ΔR, and ΔS represent the first difference values of average temperature, diurnal temperature range, rainfall, and sunshine duration, respectively. Mean and SD represent the average value and standard deviation of a group of cultivars having overlapping cultivation periods.