科研之友
微信
新浪微博
Facebook
分享链接
摘要
Southeastern wildrye [Elymus glabriflorus (Vasey ex L.H. Dewey) Scrib & C.R. Ball] has been identified as a potential native, cool-season, perennial forage crop for the southeastern United States. This study was conducted to determine how annual clovers or N applications influenced dry matter (DM) yield and nutritive values in southeastern wildrye stands. Field trials were established in 2014 at Newton and Starkville, MS, and were conducted for two growing seasons (2015 and 2016). Plots received one of five N treatments (0, 56, 112, 168, and 224 kg N ha(-1)) or five annual legumes in a randomized complete block design. Plots were sampled to monitor DM and nutritive value (crude protein [CP], acid detergent fiber [ADF], neutral detergent fiber [NDF], and relative forage quality [RFQ]). All treatments maintained adequate nutritive values for growing beef cattle throughout the course of the study. Nutritive value declined as the season progressed at each location. Clover treatments had greater mean CP (146-222 g kg(-1) DM) values compared to N treatments (141-191 g kg(-1) DM), especially in earlier harvests. Greater RFQ values were also observed for clover treatments (115-132) compared to N treatments (113-118) across all harvests. Mean cumulative DM yield, however, was somewhat greater for N-treated plots, compared to clover plots. This was more clearly observed in late season harvests, as clover composition diminished with increasing temperatures. Nutritive value and DM production of southeastern wildrye with N or annual clover inclusion produces quality feedstuffs worthy of further investigation.
- 出版日期2018-4
