洽草、草地早熟禾与草坪杂草竞争能力的比较研究

本文在2011年6月-10月期间利用田间试验方法研究了洽草、草地早熟禾与草坪重要杂草-早开堇菜的种间竞争季节动态.结果表明：（1）早开堇菜的生物量、分枝数、有性繁殖能力在与两种草坪草竞争中均受到显著抑制,草地早熟禾对其抑制强度高于洽草;（2）在竞争中洽草的生物量、分蘖数显著增加,取得比较明显的竞争优势,草地早熟禾的株高、地上生物量显著升高,但根系以及分蘖能力受到早开堇菜显著抑制;（3）早开堇菜趋于增加地下部分竞争能力,而洽草和草地早熟禾更趋向于增强地上部分的竞争能力.

Study on the Competition Ability Among Koeleria cristata L.,Poa pratensis L.and Turf Weeds

the interspecific competition among Koeleria cristata L. ,Poa pratensis L. and turf important weeds-Viola prionantha was studied using the field test method from June to October in 2011. The results showed that ： （1）. With the competition of two kinds of turf grass,the biomass and the branches numbers of V. prionantha were significantly inhibited, the intensity of inhibition from P. pratensis L. higher than K. cristata L. （2）. The biomass and the tiller numbers of K. cristata L. significantly increased, with more significant competitive advan- tages, the height and the aboveground biomass of P. pratensis L significantly increased but the underground-bi-omass and tillering ability were inhibited during the competition with V. prionantha. （3）V. prionantha tended to enhance the competitiveness of the underground part while K. cristata L. and P. pratensis L. tending to enhance the aboveground competitiveness .