A Balanced Sowing Density Improves Quality of Rapeseed Blanket Seedling
Mechanized transplanting of rapeseed (<i>Brassica napus</i> L.) blanket seedling is an effective strategy to cope with the seasonal conflict and large labor cost in rapeseed production. The sowing density is a key factor to cultivate high-quality seedlings suitable for mechanized transpl...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-06-01
|
| Series: | Agronomy |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4395/12/7/1539 |
| _version_ | 1797433945380356096 |
|---|---|
| author | Qingsong Zuo Jingjing You Long Wang Jingdong Zheng Jing Li Chen Qian Guobing Lin Guang Yang Suohu Leng |
| author_facet | Qingsong Zuo Jingjing You Long Wang Jingdong Zheng Jing Li Chen Qian Guobing Lin Guang Yang Suohu Leng |
| author_sort | Qingsong Zuo |
| collection | DOAJ |
| description | Mechanized transplanting of rapeseed (<i>Brassica napus</i> L.) blanket seedling is an effective strategy to cope with the seasonal conflict and large labor cost in rapeseed production. The sowing density is a key factor to cultivate high-quality seedlings suitable for mechanized transplanting. An experiment was conducted to investigate the effects of different sowing density levels of 638, 696, 754, 812, 870 and 928 seeds per tray (referred as D1, D2, D3, D4, D5 and D6, respectively) on agronomic traits and survival rate after mechanized transplanting of two rapeseed cultivars (Zheyouza108 and Heza17) in 2020 and 2021. The results showed that high sowing density increased plant height but decreased leaf area, collar diameter, biomass accumulation, the ratio of root to shoot and seedling fullness. These negative effects jointly decreased the seedling rate and survival rate after mechanized transplanting. However, the seedlings under D1 and D2 posed a great plant survival rate of more than 95% after mechanized transplanting, suggesting that the seedlings under the two densities were perfect for mechanized transplanting. In addition, hierarchical analysis grouped D1 and D2 into the same class, indicating that their seedling qualities were not significantly different, though the blanket seedlings under D1 outperformed those under D2 in some traits. A sowing density of 696 seeds per tray (D2) is then recommended in this study, altogether considering its high-quality seedlings suitable for mechanized transplanting, and economically, fewer seedling trays required. |
| first_indexed | 2024-03-09T10:24:12Z |
| format | Article |
| id | doaj.art-680c73b7f7ad4d71924f24b0912ad0bb |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-09T10:24:12Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-680c73b7f7ad4d71924f24b0912ad0bb2023-12-01T21:46:59ZengMDPI AGAgronomy2073-43952022-06-01127153910.3390/agronomy12071539A Balanced Sowing Density Improves Quality of Rapeseed Blanket SeedlingQingsong Zuo0Jingjing You1Long Wang2Jingdong Zheng3Jing Li4Chen Qian5Guobing Lin6Guang Yang7Suohu Leng8Agricultural College, Yangzhou University, 48 Wenhui East Road, Yangzhou 225009, ChinaJiangsu Key Laboratory of Crop Genetics and Physiology, Yangzhou University, Yangzhou 225009, ChinaJiangsu Key Laboratory of Crop Genetics and Physiology, Yangzhou University, Yangzhou 225009, ChinaJiangsu Key Laboratory of Crop Genetics and Physiology, Yangzhou University, Yangzhou 225009, ChinaJiangsu Key Laboratory of Crop Genetics and Physiology, Yangzhou University, Yangzhou 225009, ChinaJiangsu Key Laboratory of Crop Genetics and Physiology, Yangzhou University, Yangzhou 225009, ChinaJiangsu Key Laboratory of Crop Genetics and Physiology, Yangzhou University, Yangzhou 225009, ChinaJiangsu Key Laboratory of Crop Genetics and Physiology, Yangzhou University, Yangzhou 225009, ChinaJiangsu Key Laboratory of Crop Genetics and Physiology, Yangzhou University, Yangzhou 225009, ChinaMechanized transplanting of rapeseed (<i>Brassica napus</i> L.) blanket seedling is an effective strategy to cope with the seasonal conflict and large labor cost in rapeseed production. The sowing density is a key factor to cultivate high-quality seedlings suitable for mechanized transplanting. An experiment was conducted to investigate the effects of different sowing density levels of 638, 696, 754, 812, 870 and 928 seeds per tray (referred as D1, D2, D3, D4, D5 and D6, respectively) on agronomic traits and survival rate after mechanized transplanting of two rapeseed cultivars (Zheyouza108 and Heza17) in 2020 and 2021. The results showed that high sowing density increased plant height but decreased leaf area, collar diameter, biomass accumulation, the ratio of root to shoot and seedling fullness. These negative effects jointly decreased the seedling rate and survival rate after mechanized transplanting. However, the seedlings under D1 and D2 posed a great plant survival rate of more than 95% after mechanized transplanting, suggesting that the seedlings under the two densities were perfect for mechanized transplanting. In addition, hierarchical analysis grouped D1 and D2 into the same class, indicating that their seedling qualities were not significantly different, though the blanket seedlings under D1 outperformed those under D2 in some traits. A sowing density of 696 seeds per tray (D2) is then recommended in this study, altogether considering its high-quality seedlings suitable for mechanized transplanting, and economically, fewer seedling trays required.https://www.mdpi.com/2073-4395/12/7/1539rapeseed blanket seedlingmechanized transplantingsowing densitysurvival rate |
| spellingShingle | Qingsong Zuo Jingjing You Long Wang Jingdong Zheng Jing Li Chen Qian Guobing Lin Guang Yang Suohu Leng A Balanced Sowing Density Improves Quality of Rapeseed Blanket Seedling Agronomy rapeseed blanket seedling mechanized transplanting sowing density survival rate |
| title | A Balanced Sowing Density Improves Quality of Rapeseed Blanket Seedling |
| title_full | A Balanced Sowing Density Improves Quality of Rapeseed Blanket Seedling |
| title_fullStr | A Balanced Sowing Density Improves Quality of Rapeseed Blanket Seedling |
| title_full_unstemmed | A Balanced Sowing Density Improves Quality of Rapeseed Blanket Seedling |
| title_short | A Balanced Sowing Density Improves Quality of Rapeseed Blanket Seedling |
| title_sort | balanced sowing density improves quality of rapeseed blanket seedling |
| topic | rapeseed blanket seedling mechanized transplanting sowing density survival rate |
| url | https://www.mdpi.com/2073-4395/12/7/1539 |
| work_keys_str_mv | AT qingsongzuo abalancedsowingdensityimprovesqualityofrapeseedblanketseedling AT jingjingyou abalancedsowingdensityimprovesqualityofrapeseedblanketseedling AT longwang abalancedsowingdensityimprovesqualityofrapeseedblanketseedling AT jingdongzheng abalancedsowingdensityimprovesqualityofrapeseedblanketseedling AT jingli abalancedsowingdensityimprovesqualityofrapeseedblanketseedling AT chenqian abalancedsowingdensityimprovesqualityofrapeseedblanketseedling AT guobinglin abalancedsowingdensityimprovesqualityofrapeseedblanketseedling AT guangyang abalancedsowingdensityimprovesqualityofrapeseedblanketseedling AT suohuleng abalancedsowingdensityimprovesqualityofrapeseedblanketseedling AT qingsongzuo balancedsowingdensityimprovesqualityofrapeseedblanketseedling AT jingjingyou balancedsowingdensityimprovesqualityofrapeseedblanketseedling AT longwang balancedsowingdensityimprovesqualityofrapeseedblanketseedling AT jingdongzheng balancedsowingdensityimprovesqualityofrapeseedblanketseedling AT jingli balancedsowingdensityimprovesqualityofrapeseedblanketseedling AT chenqian balancedsowingdensityimprovesqualityofrapeseedblanketseedling AT guobinglin balancedsowingdensityimprovesqualityofrapeseedblanketseedling AT guangyang balancedsowingdensityimprovesqualityofrapeseedblanketseedling AT suohuleng balancedsowingdensityimprovesqualityofrapeseedblanketseedling |