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Alfalfa (Medicago sativa)–Cheat (Bromus secalinus) Competition

Published online by Cambridge University Press:  12 June 2017

David R. Pike  and
Jimmy F. Stritzke
David R. Pike
Affiliation:
Oklahoma State Univ., Stillwater, OK 74078
Jimmy F. Stritzke
Affiliation:
Oklahoma State Univ., Stillwater, OK 74078
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Abstract

A study was conducted at two locations to evaluate the effects of cheat (Bromus secalinus L. ♯3 BROSE) competition on four seeding rates (4.5, 9.0, 13.5, and 22 kg/ha) of alfalfa (Medicago sativa L. ‘Riley’). Three stages of first harvest (early bud, early bloom, and late bloom) were imposed on fall-planted alfalfa, with and without cheat overseeding, to determine the effects of harvest stage on alfalfa yield and quality. Cheat infestations significantly decreased alfalfa production and forage quality. Increasing the seeding rate of alfalfa only partially offset these losses. Harvesting early helped minimize the effect of cheat competition. First-harvest protein yield of forage was significantly decreased by, cheat overseeding. Total protein yield at first harvest was not affected by cutting stage but did increase with the two higher seeding rates of alfalfa.

Keywords

Harvest managementseeding ratecultural weed controlalfalfa qualityBROSE
Type
Weed Biology and Ecology
Information
Weed Science , Volume 32 , Issue 6 , November 1984 , pp. 751 - 756
Copyright
Copyright © 1984 by the Weed Science Society of America 

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References

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