Biological tactics of tackling field pea yield declining in the semiarid southwest

  • Chickpeas
  • Peas
  • Agriculture and Agri-Food Canada
  • Crop Rotation
  • Yields

Lead Investigator(s)

Dr. Yantai Gan

Lead Investigator(s) Institution

Agriculture and Agri-Food Canada


To determine whether heat stress coupled with drought stress during flowering cause high rate of flower abortion in field pea. To assess most sensitive stages at which the high-temperature and water stress occur to the pea plants. To evaluate the relationship between pod production and seed set and grain yield in pea cultivars released from 1970s to the most recent years. To determine the difference in the composition of rhizobacterial communities associated with various pulse crops and to relate these differences with the functionality of the rhizobacterial communities.


A seven-day period of daytime temperatures of 35°C can severely limit pea yield. A seven-day period of day temperature of 28°C can also limit pea yield under the conditions of suboptimal soil moisture. Mid-flowering is a more sensitive stage than early flowering in pea. There is strong evidence that the soil microbial communities in pulse fields can promote plant growth and serve as an important component of “rotational effect”. The structure and functionality of the rhizobacterial community varies with pulse types and plant genotypes. Certain chickpea varieties induce positive rotational effects on wheat grown the following year, comparable to field pea. Thus, the selection of crop varieties for their ability to improve soil biological quality is crucial for increasing soil productivity. The strength of a rotational effect of pulses on soil biological quality is modulated by the abundance of precipitation.

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SPG Contribution


Project Status


Duration/Timeline of Project (Year to Year)

2011 - 2014


Canadian Agri-Science Clusters Initiative of the Growing Canadian Agri-Innovations - Agriculture and Agri-Food Canada.