Strip Tillage Improves Productivity of Direct-Seeded Oilseed Rape ( Brassica napus ) in Rice–Oilseed Rape Rotation Systems

Chaosu Li, Ming Li, Tao Xiong, Hongkun Yang, Xiaoqin Peng, Yong Wang, Haiyan Qin, Haojie Li, Yonglu Tang and Gaoqiong Fan ()
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Chaosu Li: Crop Ecophysiology and Cultivation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
Ming Li: Crop Research Institute of Sichuan Academy of Agricultural Sciences, Environment-Friendly Crop Germplasm Innovation and Genetic Improvement Key Laboratory of Sichuan Province, Chengdu 610066, China
Tao Xiong: Crop Research Institute of Sichuan Academy of Agricultural Sciences, Environment-Friendly Crop Germplasm Innovation and Genetic Improvement Key Laboratory of Sichuan Province, Chengdu 610066, China
Hongkun Yang: Crop Ecophysiology and Cultivation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
Xiaoqin Peng: Sichuan Academy of Agricultural Machinery Sciences, Chengdu 610066, China
Yong Wang: Sichuan Academy of Agricultural Machinery Sciences, Chengdu 610066, China
Haiyan Qin: Sichuan Agricultural Technology Extension Station, Chengdu 610041, China
Haojie Li: Crop Research Institute of Sichuan Academy of Agricultural Sciences, Environment-Friendly Crop Germplasm Innovation and Genetic Improvement Key Laboratory of Sichuan Province, Chengdu 610066, China
Yonglu Tang: Crop Research Institute of Sichuan Academy of Agricultural Sciences, Environment-Friendly Crop Germplasm Innovation and Genetic Improvement Key Laboratory of Sichuan Province, Chengdu 610066, China
Gaoqiong Fan: Crop Ecophysiology and Cultivation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China

Agriculture, 2024, vol. 14, issue 8, 1-11

Abstract: Oilseed rape ( Brassica napus ) is a crucial global oil crop. It is generally cultivated in rotation with rice in southern China’s Yangtze River Basin, where the wet soil and residue retention after rice harvest significantly hinder its seedling establishment. Hence, this study developed a strip-tillage seeder for oilseed rape seeding following rice harvest. Additionally, seedling establishment, soil infiltration and evaporation post-seeding, soil moisture change, oilseed yield, and weed occurrence under strip tillage (ST) were compared with conventional shallow rotary-tillage (SR) and deep rotary-tillage (DR) seeding practices. Compared to SR and DR, the results demonstrated that ST had a higher seeding efficiency and 53.8% and 80.2% lower energy consumption, respectively. ST also enhanced seedling growth and oilseed yield formation more effectively than the competitor tillage treatments, with an oilseed yield increase exceeding 6%. Additionally, ST improved water infiltration and reduced soil water evaporation, resulting in higher topsoil (0–20 cm) moisture during the critical growth stages. Furthermore, ST reduced soil disturbance, significantly decreasing the density of the dominant weed, Polypogon fugax . Overall, ST seeding technology has the potential to improve the productivity of oilseed rape in rice–oilseed rape rotation systems, and its yield superiority is mainly due to seedling establishment improvement and soil moisture adjustment.

Keywords: strip tillage; oilseed rape; seedling establishment; yield; soil moisture; weed density (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
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