ADAPTATION OF BRASSICA SPP. AND FODDER RADISHES AS LATE SEASON FORAGES IN THE HIGH DESERT REGION OF OREGON.
Engel,* C.E.1; Bentley, R.A.2; Charlton, B.A.3; Roseberg, R.J.41Extension Agent, Oregon State University, Klamath Basin Research and Extension Center, Klamath Falls, OR, 97603
2Faculty Research Assistant, Oregon State University, Klamath Basin Research and Extension Center, Klamath Falls, OR, 97603
3Extension Agent, Oregon State University, Klamath Basin Research and Extension Center, Klamath Falls, OR, 97603
4Associate Professor, Oregon State University, Klamath Basin Research and Extension Center, Klamath Falls, OR, 97603
Abstract:
Investigating varieties of BRS and RAD crops that can be planted following small grain, and still reach economic yields to allow for grazing is needed. This study evaluated the yield potential and viability of winter triticale (TRT; n=1), BRS (n=6), and RAD (n=3) varieties, as late season forages. In 2009 three planting dates (PD1, 2 & 3; July 30, Aug.14, & Aug. 28, respectively) were analyzed with 2 harvest dates (HD; approximately 60 and 90 d after planting) per PD (4 replications per variety). Plots were arranged in a randomized complete block design with a split plot and were no-till seeded at 4, 7, and 100 lb pure live seed/acre (BRS, RAD, and TRT; respectively) into small grain stubble. Varieties included: TRT; Dwarf Siberian Kale; Winfred (WIN); Purple Top White Globe Turnip; Hunter; New York Turnip; Pulsar Rape (PR); Graza Radish; Colonel Radish (CR); and Terranova Radish. Across all PD, TRT was the lowest yielding variety. The variety with the greatest yield differed by PD. For PD 1 and 2, CR, BRS hybrids and PR yielded more than turnip and RAD varieties (P <= 0.05), but by PD 3 all BRS varieties yielded more than RAD varieties (P <= 0.05). The 60 d HD yielded less (P<0.01) than the 90 d HD for PD 1 and 3, only. No PD X HD interactions occurred (P> 0.16). Both BRS and RAD produced good late season yields, and seem well-suited to extend the grazing season in the high desert region of Oregon.