不同供氮水平多花黑麦草化感抑草作用与资源竞争分析

目的]为了判断黑麦草与猪殃殃的化感作用与资源竞争关系。方法]运用化感一竞争分离法，通过盆栽混播不同比例的供、受体植株，测定受体植株干重的变化规律，以探讨黑麦草对猪殃殃杂草的化感作用或资源竞争的关系。结果]当黑麦草和猪殃殃混播比例较大时（供受体混播比例为12：10），会由竞争作用转为化感作用；而在氮素胁迫条件下，两者的关系均会加强，在氮水平为10kg／667m2时，化感作用最强，随着氮水平的加大，抑制作用减弱，竞争作用逐渐加强。结论]明确黑麦草与猪殃殃的资源竞争与化感作用的关系，为黑麦草化感抑草作用研究提供理论依据。

Analysis of Lolium multiflorum Allelopathy and Resource Competitiofi under Different Nitrogen Supply

Objective ] The research aimed to determine the relation of Lolium muhiflorum and Galium aparine L. was allelopathy or resources competition. Method] Using allelopathy and competition separation-based bioassay（ACS） approach,the variation of receptor plant dry weight was measured by a pot of mixed different proportions of donor and recipient plants ,the relation of allelopathy and competition were studied when Lolium multifiorum planted in company with C, alium aparine L.. Result ] The resource competition could transfer to allelopagthy as Lolium muhiflorum （donator）mixed sowing with Galium aparine L. （receptor） ,the values was 12：10 of donator mixed sowing with Galium aparine L. ;but the relationship between the two was stronger in nitrogen stress conditions, the allelopagthy was the strongest in nitrogen level of 10 kg/667m2,the inhibition was weakened and competitive effect was strengthened gradually with increasing nitrogen levels. Conclusion ] Confirm the relation between resource competition and allelopathy,which for the allelopathy research of Lolium multiflorum provide theoretical basis.