■在自然系统中,不同的植物群落倾向于阻止单一物种占据主导地位。同样,外来入侵植物的管理可以通过竞争物种的各种组合来实现。
■我们使用了deWit替代系列来比较甘薯的不同组合(Ipomoeabatatas(L.)林),风信子豆(Lablabpurpureus(L.)甜)和每分钟英里(薇甘菊Kunth)通过光合作用的措施,植物生长,植物组织和土壤中的养分水平,和竞争力。
■单独培养的甘薯和风信子豆表现出更高的总生物量,叶柄长度,和叶面积比英里/分钟。在混合文化中,红薯或风信子豆或两者一起显着抑制了每分钟英里的参数,即,植物高度,分支,leaf,不定根,生物量(P<0.05)。基于三种植物在混合培养中的相对产量显着低于1.0,我们显示种内竞争小于种间竞争。计算指数(相对收益率,相对总产量,竞争平衡指数,和贡献的变化)显示出与每分钟英里相比,两种作物的竞争力和影响力都更高。红薯和风信子豆的存在,尤其是两个物种的结合,显著降低(P<0.05)英里/分钟的净光合速率(Pn),抗氧化酶活性(超氧化物歧化酶,过氧化物酶,过氧化氢酶,和丙二醛),叶绿素含量,和营养成分(N,P,和K)。在每分钟一英里的单一栽培土壤有机质的土壤中,总计和可用N,总计和可用K,和有效磷显著高于单作甘薯土壤(P<0.05),但低于在单一栽培土壤中种植风信子豆的土壤。植物混合物的养分土壤含量相对降低。植物高度,leaf,生物量,Pn,抗氧化酶活性,与仅与甘薯或风信子豆的混合物相比,两种作物种植的甘薯和风信子豆的植物和土壤养分含量往往要高得多。
■我们的结果表明,甘薯和风信子豆的竞争能力都大于每分钟一英里的竞争能力,此外,与单独的甘薯或风信子豆相比,通过两种作物的组合,每分钟一英里的抑制作用得到了显着改善。
UNASSIGNED: In natural systems, diverse plant communities tend to prevent a single species from dominating. Similarly, management of invasive alien plants may be achieved through various combinations of competing species.
UNASSIGNED: We used a de Wit replacement series to compare different combinations of sweet potato (Ipomoea batatas (L.) Lam), hyacinth bean (Lablab purpureus (L.) Sweet) and mile-a-minute (Mikania micrantha Kunth) through measures of photosynthesis, plant growth, nutrient levels in plant tissue and soil, and competitive ability.
UNASSIGNED: Cultured alone sweet potato and hyacinth beans exhibited higher total biomass, leafstalk length, and leaf area than mile-a-minute. In mixed culture, either sweet potato or hyacinth bean or both together significantly suppressed the mile-a-minute parameters, i.e., plant height, branch, leaf, adventitious root, and biomass (P<0.05). Based on a significantly lower than 1.0 relative yield of the three plant species in mixed culture, we showed intraspecific competition to be less than interspecific competition. Calculated indices (relative yield, relative yield total, competitive balance index, and change in contribution) demonstrated a higher competitive ability and higher influence of either crop compared to mile-a-minute. The presence of sweet potato and hyacinth bean, especially with both species in combination, significantly reduced (P<0.05) mile-a-minute\'s net photosynthetic rate (Pn), antioxidant enzyme activities (superoxide dismutase, peroxidase, catalase, and malondialdehyde), chlorophyll content, and nutrient content (N, P, and K). In soil with mile-a-minute in monoculture soil organic matter, total and available N, total and available K, and available P were significantly greater (P<0.05) than in soil with sweet potato grown in monoculture, but less than in soil with hyacinth bean grown in monoculture soil. Nutrient soil content was comparatively reduced for plant mixtures. Plant height, leaf, biomass, Pn, antioxidant enzyme activities, and plant and soil nutrient contents of sweet potato and hyacinth bean tended to be much greater when grown with two crops compared to in mixture with just sweet potato or hyacinth bean.
UNASSIGNED: Our results suggest that the competitive abilities of both sweet potato and hyacinth bean were greater than that of mile-a-minute, and also that mile-a-minute suppression was significantly improved via a combination of the two crops compared to either sweet potato or hyacinth bean alone.