不同前作对杂交狼尾草产量和品质的影响

The effects of different preceding crops on yield and forage quality of Pennisetum hybrid

对长江流域农区不同粮草前作下杂交狼尾草的草产量、再生情况和营养品质进行了研究。结果表明,多花黑麦草茬的杂交狼尾草长势好、再生植株高、分蘖多、叶面积指数大、干物质积累多、产量较高。而且茎叶比较小、鲜干比较大、适口性较好。黑麦茬茬口较早,杂交狼尾草产量高,小麦茬表现最差。但是不同前作对杂交狼尾草的营养品质的影响较小。为了达到高产优质,杂交狼尾草应与多花黑麦草或黑麦进行复种。

The forage yield,re-growth and quality of the Pennisetum hybrid following different grain and forage corps were studied in an agricultural zone in the Yangtze River Basin. Penniseturn hybrid grown following annual ryegrass had a higher plant height, greater tiller number, larger LAI, higher dry matter accumulation,and a higher forage yield compared to when grown after other crops. It also had a lower S/L rate and a higher moisture content which led to better palatability. Pennisetum hybrid when grown after rye had the highest forage yield because rye was harvested earliest in spring giving HPR a longer growing season. The Pennisetum hybrid performed the worst when grown after wheat. However, different proceeding crops had little effect on the for age nutritive quality of Pennisetum hybrid, Based on the results from the study it is suggested that Pennisetum hybrid should be multiple--cropped with either annual ryegrass or rye