| Effects of plant row spacing on plant structure，photosynthetic characteristics, and yield of replanted soybean under film mulching and drip irrigation |
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| DOI：10.7606/j.issn.1000-7601.2025.06.11 |
| Key Words: replanted soybeans plant row spacing configuration plant structure photosynthetic characteristics yield |
| Author Name | Affiliation | | SUN Tingting | College of Agronomy, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | ZHOU Liping | College of Agronomy, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | TANG Jianghua | College of Agronomy, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | LU Jingjing | College of Agronomy, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | CHEN Zhihua | College of Agronomy, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | JIANG Tao | College of Agronomy, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | HAN Jiale | College of Agronomy, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | XU Wenxiu | College of Agronomy, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China |
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| Abstract: |
| In order to screen out the row spacing configurations that promote the high yield of replanted soybean under drip irrigation in northern Xinjiang, five different plant row spacing configurations were set up from 2023 to 2024. The plant spacing was (50+15+15+15) cm×8.8 cm (T1), (50+20+20+20) cm×7.6 cm (T2), (45+15+15+15) cm×9.3 cm (T3), (45+20+20+20) cm×8 cm (T4), and (40+25+25) cm×7 cm (T5), respectively. The results showed that the plant height, stem diameter, number of main stem nodes, and average stem angle of the T5 treatment with one film and three rows were the largest in two years, and the increase was 0.75%~7.52%, 2.37%~10.51%, 2.61%~17.13% and 4.34%~16.08%, respectively, compared with the other treatments. The average petiole was the smallest, which was 1.70%~12.35% lower than that of the other treatments, and there was no significant difference from the T3 treatment with four rows of one membrane. The chlorophyll content and leaf area index of the T3 treatment with the smallest row spacing and the largest plant spacing in one film were significantly higher than those of other treatments for two years, and the average growth period was significantly increased by 5.21% and 23.02% compared with the T2 treatment with the largest row spacing and smallest plant spacing, respectively. T3 treatment had the best photosynthetic capacity, and compared with T2 treatment, Pn, Tr, and Gs increased significantly by 18.85%, 16.25%, and 28.62%, respectively, and Ci decreased by 21.85% at the pod stage and bulge stage, respectively. The yields of T3 treatment were the highest in two years, which were 3 718.90 kg·hm-2 and 3 876.71 kg·hm-2, respectively, which were 7.63% and 6.95% higher than those of T5 treatment and 24.39% and 28.17% higher than that of T2 treatment, respectively. In conclusion, the suitable field row spacing of soybean reseeding under mulching drip irrigation in northern Xinjiang was as follows: wide row spacing of 45 cm + narrow row spacing of 15 cm + plant spacing of 9.3 cm. |
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