摘要
对燕麦单播草地、燕麦+箭舌豌豆混播草地牧草组成及地上生物量动态,光能转化效率进行了观测和分析。试验结果表明,混播草地的两组分在生长发育节律和牧草产量积累过程方面均存在着较大的差异,箭舌豌豆与燕麦干物质之比随牧草生长发育的进展而逐渐增大。2种草地的干草产量在牧草生长期间差异不显著。8月中旬,单、混播草地干物质分别可达10.19、11.74t/hm2,地上净初级生产力分别为18874.69、21204.79kJ/(m2·a),光能转化率分别达0.3502%、0.3922%。
The herbage component, dynamics of yield above ground and solar energy conversion of annual cultivated grassland are measured and analyzed in this paper. The results show that there are evident differences between the two components of mixsowing grassland:growth rate and accumulation of biomass above ground. The ratio of dry matter of vetch to oat increases with the growth of herbage. In the middle of August, dry matter of oat and oat+vetch reached to 10.19 t. and 11.74 t( no evident difference). The net primary productivity above ground of oat and oat+vetch during growth period is 18 874.69 kJ/m2·a and 21 204.79 kJ/m2·a and energy conversion rate reachs to 0.3502% and 0.3922%, respectively.
出处
《草业学报》
CSCD
2003年第1期69-73,共5页
Acta Prataculturae Sinica
基金
国家科委"九五"攻关专题"青藏高原草地牦牛藏羊持续发展技术研究"(96 016 02)资助。
