Acta Prataculturae Sinica ›› 2022, Vol. 31 ›› Issue (3): 144-155.DOI: 10.11686/cyxb2020595
Yu-huan WU(), Zi-kui WANG(), Ya-nan LIU, Qian-hu MA
Received:
2020-12-30
Revised:
2021-03-08
Online:
2022-03-20
Published:
2022-01-15
Contact:
Zi-kui WANG
Yu-huan WU, Zi-kui WANG, Ya-nan LIU, Qian-hu MA. Effects of row configuration on characteristics of the light environment and light use efficiency in maize/alfalfa intercropping[J]. Acta Prataculturae Sinica, 2022, 31(3): 144-155.
年份 Year | 种植模式 Planting patterns | 干物质量 Dry matter (t?hm-2) | 土地当量比 Land equivalent ratio (LER) | ||||
---|---|---|---|---|---|---|---|
玉米 Maize | 苜蓿 Alfalfa | 系统 Total | 玉米 Maize | 苜蓿 Alfalfa | 系统 Total | ||
2018 | SM | 27.49a | 27.49a | ||||
SA | 10.02a | 10.02d | |||||
I12 | 15.59c | 2.91c | 18.51c | 0.57 | 0.29 | 0.86 | |
I22 | 17.76b | 2.06d | 19.81b | 0.65 | 0.21 | 0.85 | |
I24 | 17.44b | 4.41b | 21.86b | 0.63 | 0.44 | 1.08 | |
2019 | SM | 28.59a | 28.59a | ||||
SA | 14.73a | 14.73d | |||||
I12 | 12.99c | 9.12b | 22.11c | 0.45 | 0.62 | 1.07 | |
I22 | 17.59b | 6.20c | 23.80b | 0.62 | 0.42 | 1.04 | |
I24 | 14.13c | 9.11b | 23.24c | 0.49 | 0.62 | 1.11 |
Table 1 Total dry matter, land equivalent ratio under different maize/alfalfa relay strip intercropping systems
年份 Year | 种植模式 Planting patterns | 干物质量 Dry matter (t?hm-2) | 土地当量比 Land equivalent ratio (LER) | ||||
---|---|---|---|---|---|---|---|
玉米 Maize | 苜蓿 Alfalfa | 系统 Total | 玉米 Maize | 苜蓿 Alfalfa | 系统 Total | ||
2018 | SM | 27.49a | 27.49a | ||||
SA | 10.02a | 10.02d | |||||
I12 | 15.59c | 2.91c | 18.51c | 0.57 | 0.29 | 0.86 | |
I22 | 17.76b | 2.06d | 19.81b | 0.65 | 0.21 | 0.85 | |
I24 | 17.44b | 4.41b | 21.86b | 0.63 | 0.44 | 1.08 | |
2019 | SM | 28.59a | 28.59a | ||||
SA | 14.73a | 14.73d | |||||
I12 | 12.99c | 9.12b | 22.11c | 0.45 | 0.62 | 1.07 | |
I22 | 17.59b | 6.20c | 23.80b | 0.62 | 0.42 | 1.04 | |
I24 | 14.13c | 9.11b | 23.24c | 0.49 | 0.62 | 1.11 |
时间 Time | 平均绝对误差 MAE | 均方根误差 RMSE | ||||
---|---|---|---|---|---|---|
I12 | I22 | I24 | I12 | I22 | I24 | |
8:00 | 7.4 | 73.1 | 78.2 | 8.8 | 79.0 | 91.3 |
10:00 | 22.9 | 23.9 | 17.9 | 24.6 | 24.8 | 18.6 |
12:00 | 116.8 | 31.8 | 54.7 | 130.1 | 37.6 | 55.3 |
14:00 | 127.4 | 65.8 | 20.5 | 166.5 | 68.4 | 21.0 |
16:00 | 55.9 | 130.8 | 104.7 | 59.2 | 131.0 | 132.2 |
18:00 | 17.4 | 47.8 | 64.3 | 17.7 | 53.8 | 79.2 |
Table 2 The MAE and RMSE of simulated values and measured values of I12, I22 and I24 intercropping systems (μmol?m-2?s-1)
时间 Time | 平均绝对误差 MAE | 均方根误差 RMSE | ||||
---|---|---|---|---|---|---|
I12 | I22 | I24 | I12 | I22 | I24 | |
8:00 | 7.4 | 73.1 | 78.2 | 8.8 | 79.0 | 91.3 |
10:00 | 22.9 | 23.9 | 17.9 | 24.6 | 24.8 | 18.6 |
12:00 | 116.8 | 31.8 | 54.7 | 130.1 | 37.6 | 55.3 |
14:00 | 127.4 | 65.8 | 20.5 | 166.5 | 68.4 | 21.0 |
16:00 | 55.9 | 130.8 | 104.7 | 59.2 | 131.0 | 132.2 |
18:00 | 17.4 | 47.8 | 64.3 | 17.7 | 53.8 | 79.2 |
Fig.8 Dynamic characteristics of ratio of photosynthetically active radiation in alfalfa upper layer (IA) to total radiation (I0) during the whole growth seasons in 2019
年份 Year | 处理 Treatments | 苜蓿Alfalfa | 玉米 Maize | 系统 System | |||
---|---|---|---|---|---|---|---|
第1茬1st cutting | 第2茬2nd cutting | 第3茬3rd cutting | 总计Total | ||||
2018 | SA | 202.4 | 275.0 | 477.4 | 477.4 | ||
SM | 546.0 | 546.0 | |||||
I12 | 234.2 | 179.6 | 413.9 | 447.2 | 429.0 | ||
I22 | 182.4 | 124.6 | 307.0 | 516.5 | 438.0 | ||
I24 | 228.9 | 189.1 | 417.9 | 503.0 | 456.5 | ||
2019 | SA | 388.4 | 309.8 | 348.2 | 1046.5 | 1046.5 | |
SM | 606.4 | 606.4 | |||||
I12 | 397.4 | 308.8 | 289.7 | 995.9 | 471.8 | 757.7 | |
I22 | 401.5 | 300.5 | 185.3 | 887.3 | 545.4 | 673.6 | |
I24 | 416.1 | 312.7 | 252.7 | 981.6 | 545.3 | 783.3 |
Table 3 The PAR interception of alfalfa and maize by different cropping systems during 2018 and 2019 (MJ?m-2)
年份 Year | 处理 Treatments | 苜蓿Alfalfa | 玉米 Maize | 系统 System | |||
---|---|---|---|---|---|---|---|
第1茬1st cutting | 第2茬2nd cutting | 第3茬3rd cutting | 总计Total | ||||
2018 | SA | 202.4 | 275.0 | 477.4 | 477.4 | ||
SM | 546.0 | 546.0 | |||||
I12 | 234.2 | 179.6 | 413.9 | 447.2 | 429.0 | ||
I22 | 182.4 | 124.6 | 307.0 | 516.5 | 438.0 | ||
I24 | 228.9 | 189.1 | 417.9 | 503.0 | 456.5 | ||
2019 | SA | 388.4 | 309.8 | 348.2 | 1046.5 | 1046.5 | |
SM | 606.4 | 606.4 | |||||
I12 | 397.4 | 308.8 | 289.7 | 995.9 | 471.8 | 757.7 | |
I22 | 401.5 | 300.5 | 185.3 | 887.3 | 545.4 | 673.6 | |
I24 | 416.1 | 312.7 | 252.7 | 981.6 | 545.3 | 783.3 |
年份 Year | 处理 Treatments | 苜蓿Alfalfa | 玉米 Maize | 系统 System | |||
---|---|---|---|---|---|---|---|
第1茬1st cutting | 第2茬2nd cutting | 第3茬3rd cutting | 总计Total | ||||
2018 | SA | 2.76a | 1.61b | 2.10a | 2.10e | ||
SM | 5.03c | 5.03a | |||||
I12 | 1.41d | 1.13c | 1.29d | 7.67a | 4.31d | ||
I22 | 1.73c | 1.87a | 1.79c | 5.50b | 4.52c | ||
I24 | 1.95b | 1.92a | 1.94b | 7.63a | 4.79b | ||
2019 | SA | 1.76b | 1.41a | 1.01b | 1.41c | 1.41d | |
SM | 4.71c | 4.71a | |||||
I12 | 2.36a | 1.55a | 0.88b | 1.72ab | 6.05a | 2.92c | |
I22 | 2.32a | 1.54a | 1.40a | 1.91a | 5.16bc | 3.53b | |
I24 | 1.97b | 1.80a | 1.15ab | 1.68b | 5.70ab | 2.97c |
Table 4 The light use efficiency of alfalfa and maize in 2018 and 2019 (g?MJ-1)
年份 Year | 处理 Treatments | 苜蓿Alfalfa | 玉米 Maize | 系统 System | |||
---|---|---|---|---|---|---|---|
第1茬1st cutting | 第2茬2nd cutting | 第3茬3rd cutting | 总计Total | ||||
2018 | SA | 2.76a | 1.61b | 2.10a | 2.10e | ||
SM | 5.03c | 5.03a | |||||
I12 | 1.41d | 1.13c | 1.29d | 7.67a | 4.31d | ||
I22 | 1.73c | 1.87a | 1.79c | 5.50b | 4.52c | ||
I24 | 1.95b | 1.92a | 1.94b | 7.63a | 4.79b | ||
2019 | SA | 1.76b | 1.41a | 1.01b | 1.41c | 1.41d | |
SM | 4.71c | 4.71a | |||||
I12 | 2.36a | 1.55a | 0.88b | 1.72ab | 6.05a | 2.92c | |
I22 | 2.32a | 1.54a | 1.40a | 1.91a | 5.16bc | 3.53b | |
I24 | 1.97b | 1.80a | 1.15ab | 1.68b | 5.70ab | 2.97c |
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