草业学报2017，Vol.26Issue(1)：72-80,9.DOI:10.11686/cyxb2016087
不同刈割组合方式对皇竹草生长和生产特点的影响
Effects of different cutting height and frequency combinations on growth and production performance of hybrid giant napie
摘要
Abstract
This experiment was designed to explore the effects of cutting regime on growth characters and pro-duction performance of hybrid giant napie (Pennisetum sinense )planted on Yellow River flood plain,and con-sisted of a factorial combination of four cutting heights (cutting at 5,10,15 and 20 cm)and 4 cutting frequen-cies(cutting interval 30,40,60 and 120 d),to address some difficult problems with this species,including short utilization period,low yield,poor forage quality,and a high incidence of lodging with this cropplanted in Yellow River flood plain under continental climate.The cutting regime had a significant effect on the growth and production of hybrid giant napie.Multiple cutting within a growing season decreased stem to leaf ratio (S/L ratio)and leaf area index (LAI),while optimal cutting (cutting at 15 -20 cm height and 60 d intervals) raised fresh biomass to dry matter ratio (F/D ratio),tiller density,and growth rate,compared to other treat-ments.More frequent and severe defoliation (cutting at 5 cm height and 30 d intervals)raised F/D ratio and number of single plant tillerings,noticeably decreased incidence of lodging,but decreased re-growth rate which was unfavourable to sustainable and efficient production of forage.The more favourable cutting regimes in-creased forage yield by 14.3%-17.3% compared to that (cutting only at 120 d cutting interval)and the annual forage yield reached 32 t DM/ha.Furthermore,optimal cutting decreased lodging,reducing losses of energy and nutrients at harvest.In conclusion,optimal cutting height and frequency,together with appropriate irriga-tion and fertilizer regimes were important to achievement of production potential,eliminating unnecessary los-ses in yield and forage quality.关键词
皇竹草/刈割/生产特点Key words
hybrid giant napie/cutting/production performance引用本文复制引用
郭孝,邓红雨,胡华锋,李建平,黄安群,白昌军,唐军..不同刈割组合方式对皇竹草生长和生产特点的影响[J].草业学报,2017,26(1):72-80,9.基金项目
河南省高等学校重点科研项目（16B230002），河南省财政厅农业技术推广项目（51000698）和郑州市科技攻关项目（141PPTGG423）资助。 （）
