刈割期和留茬高度对杂交臂形草产量和品质的影响  

The effect of different cutting stages and stubble heights on the yield and quality of Bachiaria hybrid

作　　者：蔡小艳 史静 管淑艳 张富 蒋建生[4] 

机构地区：[1]广西畜牧研究所,南宁530001 [2]武汉东风鸿泰汽车资源循环利用有限公司,武汉430056 [3]东风本田汽车有限公司,武汉430056 [4]广西大学,南宁530004

出　　处：《黑龙江畜牧兽医》2017年第7期139-141,146,共4页Heilongjiang Animal Science And veterinary Medicine

基　　金：国家现代农业产业技术体系广西肉牛肉羊产业创新团队建设项目(nycytxgxcxtd-09-04);优势生态牧草遴选及果草耦合研究与示范项目(桂科合14125008-2-13);亚热带木本饲料资源开发与利用项目(桂渔牧科1304502);石漠化牧草品种筛选研究项目(桂渔牧科1304558)

摘　　要：为了研究不同刈割期(拔节期、开花期、成熟期)和留茬高度(0,5,10,15,20 cm)对杂交臂形草产量和品质的影响,进行了杂交臂形草种植试验,测定了产量和品质指标。结果表明:拔节期留茬15 cm草产量最高,为每公顷232.00 t;其次为拔节期留茬20 cm,产量为每公顷217.64 t。营养含量均以拔节期表现最高。留茬高度对拔节期牧草主要营养成分含量无明显影响,拔节期粗蛋白、粗脂肪、粗纤维和粗灰分含量在留茬0 cm和15 cm时分别为13.08%、5.62%、25.79%、9.88%与12.20%、4.14%、28.63%和10.47%,无显著差异(P>0.05);但留茬15 cm时粗灰分含量显著高于留茬0 cm(P<0.05)。说明杂交臂形草的最佳刈割期为拔节期,最佳留茬高度为15 cm。To investigate the effect of different cutting stages（jointing, blooming and mature stages） and stubble heights （0,5,10,15,20 cm） to the yield and quality of Bachiaria hibrld ,planting experiments were conducted via measuring the yield and quality. The results showed that the total yields of fresh forage were the highest in the jointing stage of 15 cm stubble in height, nearly 232. 00 t/hm2 in one year and the second one was 217.64 t/hm2 in 20 cm height in the same stage. Nutritional contents were the highest in the jointing stage and stubble heights took no significant effect on the main nutritional ingredients. Most nutritional ingredients had the best performance, such as the contents of crude protein, crude fat,crude fiber and crude ash in 0 cm and 15 cm stubble height,were 13.08% ,5.62% ,25.79% ,9.88% and 12.20% ,4.14%, 28.63%, 10.47%, respectively, with no significance （P 〉 0.05 ）. The content of crude ash in 15 cm stubble height was significantly higher than that in 0 cm height（ P 〈 0.05 ）. Therefore the optimal cutting stage and stubble height were jointiug stage and 15 cm, respectively.

关 键 词：臂形草 刈割期 留茬高度 产量 品质 

分 类 号：S543[农业科学—作物学]