Abstract: In order to screen out the germplasm materials for direct feeding or breeding of forage rice,the nutritive values and ensiling characteristics were investigated of six rice varieties,including Tianyou 998,Peizaruanxiang,Guixiangnian,Pin 14,Pin 15,and Huajingxian 74.When harvesting at yellow stage of maturity,tiller numbers per plant,height of plant,yields and nutrient contents of whole crop were measured.The fresh whole crop rice was chopped and ensiled with the small film bags after adding with or without lactic acid bacteria.The nutrient contents of the materials prior to ensiling and the silage fermentation quality after ensiled for 60 days were investigated.The results show that Peizaruanxiang had the most tillers and highest height,Tianyou 998 the highest yield,and Huajingxian 74 the highest crude protein content.There were no significant differences in contents of mono-oligosaccharides among the rice varieties.Significant differences were detected in pH values of whole crop rice silages among varieties and Peizaruanxiang silage had the lowest pH value.Based upon DM yield,crude protein,and crude ash contents,Tianyu 998 and Huajingxian 74 might be directly used as forage or used as breeding materials for forage rice.Lactic acid bacteria inoculation had no significant impact on pH values,and NH₃-N and organic acid contents of rice silage in the present experiment.

Key words: Forage rice, Fermentation quality, Nutritive value, Lactic acid bacteria, Silage

摘要： 为筛选出适合直接饲用或用作饲料稻育种的材料,对六个水稻(Oryza sative)品种(桂香粘、华粳籼74、品14、品15、培杂软香和天优998)的农艺性状、营养成分和青贮特性进行了研究.水稻的株高、分蘖和产量等农艺性状以及全株的营养成分在黄熟期收割时调查、分析,水稻的青贮分别设对照、乳酸菌1和乳酸菌2处理,在常温下贮存60 d后分析.研究结果表明:培杂软香植株最高、分蘖最多,天优998产量最高,华粳籼74的粗蛋白质含量最高,桂香粘的粗灰分含量最低,各品种间单少糖含量差异不显著;各青贮水稻品种间的pH值差异显著,其中以培杂软香的pH值最低;天优998和华粳籼74在产量方面优势明显,粗蛋白质含量或灰分含量尚可,比较适合作为饲用的水稻品种或作饲料稻的育种材料;单独添加乳酸菌对这六个水稻品种青贮料的pH值、氨态氮和有机酸含量无显著影响.

关键词: 饲料稻, 营养价值, 青贮饲料, 乳酸菌, 发酵品质