杂交狼尾草新品系1号的再生特性及品质研究  

Studies on regeneration characteristics and quality of the Pennisetum americamum‘23A’×P.purpureum‘51’‘Huanan No.1’

作　　者：韩卡文 石秀兰[1] 韦立台 杨磊 张群珧 韩瑞宏[1] 陈平[1,2] 郭微 HAN Kawen;SHI Xiulan;WEI Litai;YANG Lei;ZHANG Qunyao;HAN Ruihong;CHEN Ping;GUO Wei(College of Horticulture and Landscape Architecture, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China;Guangdong Province Key Laboratory of Waterfowl Healthy Breeding, Guangzhou 510225, China)

机构地区：[1]仲恺农业工程学院园艺园林学院,广东广州510225 [2]广东省水禽健康养殖重点实验室,广东广州510225

出　　处：《仲恺农业工程学院学报》2020年第4期1-5,共5页Journal of Zhongkai University of Agriculture and Engineering

基　　金：广东省科技计划(2015A020209187,2016A020207003);广州市科技计划(201607010099);广东省土地复垦植被恢复工程技术研究中心建设(粤科函政字〔2013〕1589号)资助项目.

摘　　要：为探究杂交狼尾草新品系刈割后的再生特性及再生品质,以生长第2年的杂交狼尾草新品系1号(Pennisetum americamum‘23A’×P.purpureum‘51’‘Huanan No.1’)为试验材料,通过田间试验对不同刈割时间的杂交狼尾草新品系再生速度、再生草产量、再生速率、再生强度及再生品质进行了研究.结果表明冬季11月刈割,翌年4月可收获第一茬再生草,随着温度升高、降雨增多,植株再生速度加快,但高温干旱导致再生分蘖数减少,8月分蘖数最低38个/丛,5月末最高为58个/丛,显著高于其它处理(P<0.05);刈割次数增加,导致后期再生强度、再生速率及再生草产量明显降低,以5月份收获的再生草干草产量为最高(40.0 t/hm^2),占全年产量的47.6%;粗蛋白含量以5月份最高为9.29%,10月份最低为7.04%,但10月份的粗蛋白质产量比4月份高出151.4 kg/hm^2.杂交狼尾草新品系1号再生性受温度、水分条件影响较大,刈割后加强田间水肥管理,干旱期间适当补水,有利于提高再生草产量和品质.The regeneration characteristics and regeneration quality of the Pennisetum americamum‘23A’×P.purpureum‘N51’‘Huanan No.1’was studied after mowting,the P.‘23A’×P.purpureum‘N51’‘Huanan No.1’of second year was used as a test material,the regeneration speed,regeneration grass yield,regeneration rate,regeneration intensity and regeneration quality of the strain were studied.The results showed that:(1)Mowing in November,the regenerated grass of first harvesting could be harvested in April of the following year.With the increase of temperature and rainfall,the rate of plant regeneration accelerated,but the high temperature and drought reduced the number of reproductive tillers,the lowest tillers were 38 per bush in August,and the highest tillers were 58 per bush at the end of May,which was significantly higher than other treatments(P<0.05);(2)the number of mowing increased,regeneration intensity,regeneration rate,and regenerated grass yield barley significantly decreased in the later period,the harvested dry matter yield of regenerated grass in the May was the highest(40.0 t/hm^2),accounting for 47.6%of the annual year.The crude protein content was the highest 9.29%in May,and the lowest 7.04%in October,but the yield of crude protein in October was 151.4 kg/hm^2 higher than that in April.The regeneration characteristics of the Pennisetum americamum‘23A’×P.purpureum‘N51’‘Huanan No.1’was greatly affected by temperature and water conditions,it was beneficial to improve the yield and quality of the grass by strengthening the management of water and fertilizer in the field after mowing and adding water properly during drought.

关 键 词：杂交狼尾草 刈割 再生特性 品质 

分 类 号：S43[农业科学—农业昆虫与害虫防治]