杂交狼尾草新品系1号对种植密度和刈割高度调控的响应  

Response of Pennisetum americamum ‘23A’×P.purpureum ‘N51’‘Huanan No. 1’to planting density and cutting height

作　　者：石秀兰[1] 陈平[1] 韩瑞宏[1] 陈丽勤[1] 陈丽莎[1] 

机构地区：[1]仲恺农业工程学院园艺园林学院,广东广州510225

出　　处：《仲恺农业工程学院学报》2013年第2期6-11,共6页Journal of Zhongkai University of Agriculture and Engineering

基　　金：广东省良种培育与引进项目(粤财农[2004]295号);仲恺农业工程学院校级科研基金项目(G3061220)资助

摘　　要：就种植密度和刈割高度对当年种植的杂交狼尾草新品系1号(Pennisetum americamum‘23A’×P.purpureum‘N51’‘Huanan No.1’)的生长和牧草产量的影响进行了研究.结果表明,28 000、36 000株/hm2的种植密度对新品系1号单蘖干质量、株丛干质量没有显著影响,而对牧草总产量有显著影响(P<0.05);刈割高度对单蘖干质量、株丛干质量均有显著影响(P<0.05),等次刈割时产草量随刈割高度增加而增加,且差异显著(P<0.05),但种植密度和刈割高度间不存在交互效应(P>0.05);达到生长高度而不及时刈割对来年牧草再生有一定影响.10月份干旱少雨是影响杂交狼尾草新品系1号再生的主要因素,按不同刈割高度收获饲草时,刈割后如遇干旱需及时供水,可提高饲草产量.The regeneration rate and forage yield for Pennisetum americamum ＇23A＇ × P. purpureum ＇ N51＇ ＇ Huanan No. 1 ＇ was studied under the different planting densities and cutting height. The re- sults showed that the different planting densities between 2g 000 and 36 000 plants/bin2 had no signifi- cant difference on dry weight per tiller and plant, but had significant difference on forage fresh yield （P 〈0. 05 ）. The different cutting height had significant difference on dry weight per tiller and plant （P 〈0.05 ）, the forage fresh yield increased with the increase in cutting height significantly （P 〈 0.05 ）. The interaction effect had no significant difference between the planting density and cutting height （ P 〉 0. 05 ）. The principal factor affecting the regeneration of the hybrid penrtisetum was the drought after October of a year. Water should be supplied timely after cutting to improve forage yield when the grass was cut at different height.

关 键 词：杂交狼尾草(Pennisetum americamum'23A’×P purpureum'N51’) 种植密度 刈割高度 调控 

分 类 号：S812[农业科学—草业科学]