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为了寻求人工调控存在化感物质间作群体的理论依据,通过盆栽试验,探讨不同供水水平下(田间持水量的75%、60%和45%),小麦根系分泌物丁香酚对单作和间作蚕豆、小麦生长速率(Crop Growth Rate,CGR)及籽粒产量的影响。结果表明:在蚕豆苗期-始花期、结荚-成熟期2个生育阶段,丁香酚对蚕豆生长速率整体表现为抑制作用,但结荚-成熟期75%供水水平下的单作、60%供水水平下的间作除外,增加供水缓解了单作蚕豆的抑制作用、加剧了间作蚕豆的抑制作用,间作模式可缓解抑制;自苗期以后,丁香酚对小麦生长速率表现为抑制作用,且增加供水亦不能缓解抑制,但在开花-成熟期间作模式可以缓解抑制。在同等供水水平下,间作籽粒产量与单作籽粒产量的加权平均相比增加了24.92%-52.74%。丁香酚除对45%供水水平下小麦籽粒产量有化感促进作用以外,对两种作物的其他处理均呈现化感抑制作用。间作可弱化丁香酚对小麦、蚕豆籽粒产量的化感作用。
In order to find out the theoretical basis for the artificial regulation of the allelopathic intercropping population, pot experiments were conducted to investigate the effect of eugenol on wheat root exudates at single and intercropped faba bean at different water supply levels (75%, 60% and 45% , Wheat growth rate (CGR) and grain yield. The results showed that eugenol inhibited the growth of Vicia faba at two growth stages: seedling stage-initial flowering stage and pod-maturity stage. However, single stage and 60% Except for intercropping at the water supply level, increasing water supply relieved the inhibition of single broad bean and aggravated the inhibitory effect of intercropped broad bean, and the intercropping mode could alleviate the inhibition. Eugenol inhibited the growth of wheat at seedling stage and increased Supplying water also did not alleviate the inhibition, but moderation during flowering-maturation could alleviate the inhibition. At the same water supply level, the intercropping grain yield increased by 24.92% -52.74% compared with the weighted average of single-grain yield. In addition to the allelopathic effects of eugenol on wheat grain yield at the 45% water supply level, all the other treatments of the two crops showed an allelopathic inhibitory effect. Intercropping can weaken the allelopathic effect of eugenol on the grain yield of wheat and broad bean.