草业学报Issue(12)：112-120,9.DOI:10.11686/cyxb2015294
氮肥用量、刈割高度对饲用苎麻产量、营养品质及败蔸的影响
Effect of nitrogen fertilization rate and cutting height on yields,nutritive values and root-rot incidence in forage ramie
摘要
Abstract
Ramie (Boehmeria nivea )is rich in nutrients,and is a protein source for animal feed.The objective of this study was to investigate the effects of nitrogen fertilization rate and cutting height on forage yields,nu-tritive values and root-rot (a common disease in ramie)of Xiangzhu-3 and Tri-1 varieties,and thus provide ad-visory support for use of Xiangzhu-3 and Tri-1 ramie varieties as a forage crop.A field trial was conducted with a two-factor randomized block design (3×3),including three cutting height levels (40 cm,D1 ;70 cm,D2 ;100cm,D3 )and three levels of nitrogen fertilizer (0 kg/ha,N1 ;92 kg/ha,N2 ;138 kg/ha,N3 ).Dry matter yield (DM),nutrient content and root-rot incidence were measured to elucidate the effect of different nitrogen fertili-zation and cutting height treatments on the feeding value of Xiangzhu-3 and Tri-1 ramie varieties.Nitrogen fer-tilization and cutting height had significant effects on biomass,dry matter (DM)yield,crude protein (CP), crude fat (EE),crude ash (Ash),crude fiber (CF)and phosphorus (P)contents of Xiangzhu-3 and Tri-1. Cutting height was the dominant factor affecting DM and CF.For CP content,Xiangzhu-3 was most influenced by cutting height,while Tri-1 responded to by nitrogen fertilization.Both EF and CF data displayed significant interaction between cutting height and nitrogen fertilization.Additionally,both ramie varieties had greatest DM,CP,and EE under the N2 treatment within each cutting height treatment,while the CF content was de-creased with increased nitrogen fertilization levels.In each nitrogen fertilization treatment,the CP,calcium (Ca)and P contents of Xiangzhu-3 and Tri-1 were decreased and the biomass and CF were increased with in-creased cutting heights.Increasing cutting frequency increased the root-rot incidence of Xiangzhu-3 and Tri-1. In summary,this study indicated that the optimal clipping height and nitrogen fertilization treatments of Xiang-zhu-3 and Tri-1 ramie varieties were 70-100 cm and 92 kg/ha,respectively.关键词
饲用苎麻/产量/营养品质/败蔸/综合评价Key words
forage ramie/yield/nutritive quality/root-rotten/comprehensive evaluation引用本文复制引用
白玉超,郭婷,杨瑞芳,佘玮,曹诣,肖呈祥,崔国贤..氮肥用量、刈割高度对饲用苎麻产量、营养品质及败蔸的影响[J].草业学报,2015,(12):112-120,9.基金项目
国家麻类产业技术体系土壤肥料岗位（CARS-19-E20）和国家自然科学基金项目（31471543）资助。 （）
