IPI International Potash Institute
IPI International Potash Institute

Scientific abstracts

Title:
The Effects of Chloride and Potassium Nutrition on Seed Yield of Annual Canarygrass
Authors:
May, W.E., S.S. Malhi, C.B. Holzapfel, B.X. Nybo, J.J. Schoenau, and G.P. Lafond
Published in:
Agron. J. 104(4):1023-1031 (2012), English

Abstract:

The year-to-year variability of seed yield in annual canarygrass (Phalaris canariensis L.) is a major concern among growers. A field experiment was conducted at 13 site-years across Saskatchewan to determine the response of annual canarygrass seed yield to K and Cl, and to provide better recommendations to producers on the use of KCl fertilizer in annual canarygrass based on soil test results. Potassium did not affect the yield or development of annual canarygrass over a range of 155 to 717 kg K ha−1 in the top 15 cm of soil. Chloride had a large impact on annual canarygrass seed yield; seed yield increased by approximately 24% when Cl was added in the form of KCl or CaCl2 when averaged across all sites. The seed yield increased because the application of Cl increased panicle size (seeds panicle−1). The magnitude of the response tended to increase as level of Cl in the soil decreased. Annual canarygrass growers need to measure Cl when using soil tests to determine fertilizer requirements. It is recommended that 9.1 kg Cl ha−1 in the form of 20 kg ha−1 of KCl be applied when the Cl level in the surface soil (0-15 cm) is below 70 kg Cl ha−1. The findings encourage growers to conduct individual field test strips to determine the strength of the Cl response.

Return to the Scientific abstracts

In your Language

Choose your Crop

Choose your App
IPI research e-ifc app for iPad and iPhone available now from the Apple App Store
IPI Research App for Android and Apple phones and tablets.

Infographics
The Role of Potassium (K) in the Plant (in Urdu)
Potassium and Nitrogen Use Efficiency (NUE) in Urdu
Potassium in Soil and Plant Systems (in Urdu)
IPI profile infographic
Chloride - an essential nutrient
Potassium and Nitrogen Use Efficiency (NUE)
Managing Water and Fertilizer for Sustainable Agricultural Intensification - infographic
Potassium Improves your Crop Quality
Potassium Improves your Health
Potassium in Soil and Plant Systems
The Role of Potassium (K) in the Plant
What does a Plant Need to Live
Assessment of the Impact of Targeted Use of Fertilizer on Irrigated Rice in Asia
The Role of Potassium (K) in the Plant (in Urdu)

New publication