箭舌豌豆与多花黑麦草混播群落氮素动态研究

NITROGEN DYNAMICS OF COMMON VETCH-ITALIAN RYEGRASS MIXTURE COMMUNITY

在盆栽条件下，对箭舌豌豆＋多花黑麦草不同生育期地上和地下部分生物量、氮素含量、氮素积累速率及箭舌豌豆生物固氮速率、固氮量以及氮在土壤－植物根系－植物地上器官之间的转移动态进行了研究，结果表明：在混播群落中，生长发育前期阶段以箭舌豌豆占绝对优势，后期则黑麦草生长加快；植物地上部氮素积累速率为双峰型，地下根系则为单峰型；混播中箭舌豌豆的固氮速率呈单峰型。

The dynamics of biomass,nitrogen content,nitrogen speed accumulated by mixture community,the speed and quantity of nitrogen fixed by iegumes,and the translation of nitrogen in the soil and forages were investigated under tub cultural condition.The result indicated that the biomasses of mixture community was contributed from vetch mainly,especialy in the early growing period.The nitrogen speed curve accumulated by forages have double and single peak value in the above and under ground,respectively.The nitrogen speed curve fixed by vetch in the mixture community has single peak value.