2004 Perennial Ryegrass Harvest – Sumas Prairie

 

2004 Perennial Ryegrass Harvest – Sumas Prairie
Dry Matter Yield (tonnes/ha)
Cultivar Cut 1
May 6
Cut 2
Jun 18
Cut 3
Aug 3
Cut 4
Sep 16
Cut 5
Oct 20
Total % Check
Early Maturing Cultivars
ARIES n/a n/a 1.02 1.13 1.31 n/a n/a
TETRYLYTE II 3.82 3.31 1.16 0.43 1.08 9.8 99
BASTION 3.17 3.12 1.2 1.32 1.05 9.85
Intermediately Maturing Cultivars
CALIBRA 3.05 3.16 0.97 1.22 1.2 9.6 98
LAGUANA 3.01 3.06 1.49 1.45 1.43 10.43 106
PSGG-9-04 n/a n/a 0.72 0.65 0.71 n/a n/a
ROSALIN 2.93 3.19 1.09 1.27 1.29 9.77
Late Maturing Cultivars
PIAMONTE 2.95 3.52 1.27 1.47 1.29 10.52 108
TURNDOT 2.73 3.49 1.05 1.23 1.39 9.89 102
CONDESA 2.1 3.84 1.19 1.21 1.36 9.7
Mean 2.79 3.34 1.11 1.14 1.21 9.98
CV 31.6 10.3 28.7 31.9 17.8 32.2
LSD (P 0.63 0.35 NSD* 0.33 0.23 1.13

CV = coefficient of variation
LSD = least significant difference
Bastion, Rosalin, and Condesa were used as check varieties.
*NSD = F-tests indicate that there were no significant differences between yields at alpha=0.05

Notes:
Aries and PSGG-9-04 suffered from winterkill at this site and for the first two harvests there was less than 100g of sample from the harvest areas. In the remaining harvests the surviving plants had grown robust enought to justify harvests. As with other sites, some perennial ryegrass cultivars had the greatest dry matter yields in the second cut. Tetrylyte II seemed to suffer considerably from the hot, dry weather experienced mid to late summer.