摘要
在高寒地区,通过建植多年生禾草混播草地来提高草地生产力的生产模式是可行且有效的。增施氮肥,均能达到增产目的。针对Ⅲ组分混播组合最佳施N量是113kg/hm2,对Ⅳ组分混播组合最佳施为N75kg/hm2。且该施肥水平下组合间产量差异不显著。但从经济效益角度考虑,Ⅳ组分混播组合优于Ⅲ组分混播组合,且施肥后效均显著。从产量角度看,组合:无芒雀麦+垂穗披碱草+扁穗冰草+冷地早熟禾(组合Ⅲ)的适宜刈割期为9月份,而其他组合应在8月份。
In alpine region, it is feasible and effective to improve the productivity by establishing mixed artificial perennial grassland. The yield of mixed grassland can be significantly improved by Nfertilizer. The optimum application rate of the Nfertilizer is 113 kgN/hm2 for the mixture grassland with 3 species of grasses and 75kgN/hm2 for the 4species mixture. Therefore, the latter is better than the former economically. Based on the yields, the community of Bromus inermis+ Clinelumus sibiricus+ Agropyron cristatum + Poa crymophila should be harvested in September, the other should be in Augest.
出处
《草原与草坪》
CAS
2003年第3期23-28,共6页
Grassland and Turf
基金
甘肃省科技厅"九五"重点科技攻关项目"高寒牧区人工草地及其集约化草地畜牧业研究"(GK971 2 36A)
关键词
高寒地区
多年生禾草
混播草地
地上生物量
氮肥
alpine region
mixed artificial perennial grassland
above-ground phytomass
N-fertilizer
