| Effects of planting pattern and density on photosynthetic characteristics and yield of foxtail millet |
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| DOI：10.7606/j.issn.1000-7601.2022.02.07 |
| Key Words: foxtail millet plant pattern plant density yield photosynthetic characteristics |
| Author Name | Affiliation | | QU Yang | Baoji Institute of Agricultural Science, Qishan, Shaanxi 722499, China | | MA Wen | Baoji Institute of Agricultural Science, Qishan, Shaanxi 722499, China | | WANG Kezhen | Baoji Institute of Agricultural Science, Qishan, Shaanxi 722499, China | | GAO Xiaoli | College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China | | FENG BaiLi | College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China | | WANG Baomei | Baoji Institute of Agricultural Science, Qishan, Shaanxi 722499, China |
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| Abstract: |
| The Yugu 31 of foxtail millet variety was used as the experimental material to explore the effect of plant pattern and density on photosynthetic utilization and yield of foxtail millet. Two planting pattern treatments of plant pattern of 2∶0 (P1) and plant pattern of 3∶0 (P2) and three plant densities of 2.7×105 plants·hm-2（D1）, 3.3×105 plants·hm-2（D2）, and 3.9×105 plants·hm-2（D3）were used to form different cultivation patterns by split zone design with 3 duplicates in 2019-2020. The results showed that highly significant effects were found in year, plant pattern, plant density, and interaction effect among treatments (P<0.01). P1 yield with 2 971.1 kg·hm-2 was higher by 20.37%（P<0.05） than that of P2, and D2 yield with 2 872.1 kg·hm-2 were higher by 10.34%（P<0.05）and 6.98%（P<0.05） than that of D1 and D3, respectively. Under the same plant pattern, plant density increasing led to decrease of SPAD, Pn，IWUE, WUE, and CE. Values of SPAD, Pn，IWUE, WUE, and CE from P1 in tested seasons increased by 4.73%, 1.95%, 3.77%, 8.61%, and 12.54%, respectively, compared with that of P2. In addition, density increasing had no significant effect on ear length and ear diameter, but density increasing had significant effects on plant height, kernels per ear, and 1000-seed weight. Kernels per ear and 1000-seed weight from D2 in P1 increased by 9.11%,13.53% respectively compared with that of D1, and 11.76%, 7.55% respectively compared with that of D3. Kernels per ear and 1000-seed weight from D2 in P2 increased by 7.98%, 6.06% respectively compared with that of D1, and 5.77%, 22.22%, respectively, compared with that of D3. The plant pattern of 2∶0 (P1) with 3.3×104 plants·hm-2（D2）was the effective cultivation pattern for increasing yield due to better use efficiency of light and temperature. |
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