Type, frequency, and diversity of pulses on annualized protein-based yield in pulse-wheat rotation system
Date
2022-03-08
Authors
Lasisi, Ahmed
Liu, Kui
Bandara, Manjula
Gan, Yantai
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Conference Presentation
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Abstract
Pulses are major break crops in wheat production system to reduce nitrogen fertilization and improve system productivity on the semi-arid Canadian Prairies. However, it is unclear how the type, frequency, and diversity of pulses affect annualized protein-based yield (PBY; average protein yield over a rotation cycle) in pulse-wheat production systems. This study examined the effect of pulse type (chickpea, lentil, and pea), pulse frequency (one, two, and three pulse years in every 4-yr rotation), and pulse diversity (one pulse type, two pulse types, and three pulse types in every 4-yr rotation) on PBY in two 4-yr wheat-based rotation cycles. The study was conducted at three sites, including two sites at Swift Current (SK) and one site at Brooks (AB), from 2010 to 2019. Results showed that PBY in pulse-wheat rotation systems was significantly (P = 0.0036) in the order of pea-wheat (502 kg ha-1 yr-1) > lentil-wheat (449 kg ha-1 yr-1) > chickpea-wheat (375 kg ha-1 yr-1) > continuous wheat (350 kg ha-1 yr-1) rotation systems irrespective of pulse frequency across sites-cycles. Although there was a significant effect of pulse inclusion on PBY in the wheat production system over the two rotation cycles, there was no significant effect of pulse frequency on the PBY across pulse types. Similarly, diversifying pulses to include more than one pulse type in the pulse-wheat rotation system did not significantly increase PBY. Overall, including pulses in wheat production system can improve PBY irrespective of type, frequency, and diversity of pulses.
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Keywords
Pulses, wheat, crop rotation, protein-based yield
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Soils and Crops Workshop