查询词典 grasses

Plant species were classified into six plant functional groups based on their life forms, that is, trees, shrubs, sub-shrubs, perennial grasses, perennial forbs and annuals.

2依照生活型将锡林河流域主要植物种划分成6个植物功能群：乔木、灌木、半灌木、多年生禾草、多年生杂类草和一年生植物。

The change of plant functional types' importance value shows: with the succession, annual or biennial forbs rapidly decrease then slowly increase, but overall decrease; perennial forbs increase firstly and reduce afterward; perennial grasses increase linearly.

植物功能群重要值变化分析表明：随着演替的进行，1、2年生杂草先迅速减小后缓慢增大，但总体减小；多年生杂草先增大后减小；多年生禾草类线性增加。

The results showed:(1)Nitrogen addition changed the soil physical and chemical properties, enhancing the content of NO3—- N available resources in the soil, increasing the plants height and cover, reducing the vegetation light penetration. With increasing of N addition, both the species richness and the diversity decrease sharply (P 0.001).(2)N addition increased the aboveground biomass significantly (P 0.05). With increasing of N addition, the aboveground biomass increased first then decreased, and the grasses biomass increased while the forbs and legumes biomass decreased.(3)There was a significant linear positive relationship between species richness and vegetation light penetration (P 0.05), and also between aboveground biomass and soil NO3—- N content (P 0.05). The relationship between aboveground biomass and species richness was negative upon enhanced N supply.

结果表明：（1）氮素添加提高了土壤中NO3—- N等可利用资源的含量，增加了植物群落植被的盖度，减小了植被的透光率，随着施氮量的增加群落中物种丰富度显著降低（P 0.001）；（2）氮素添加显著改变了植物群落地上生产力（P 0.05），随着施氮量的增加地上生产力呈现先增加后降低的变化趋势，各功能群中禾草生物量显著增加，而杂草和豆科生物量随施氮量增加逐渐减少；（3）物种多样性与植被透光率呈线性正相关（P 0.05）；地上生产力与土壤NO3—- N含量呈线性正相关（P 0.05）；随着施氮量的增加物种丰富度与生产力之间呈负相关关系。

Seen from the functional group, perennial grasses and forbs had stable compositions, but compositions and number of shrubs, half shrubs, small half shrubs, annuals and biennials were unsteadiness, where aboveground biomass in warmed plots was much difference with control. Nitrogen addition may enhance aboveground biomass obviously from latter growth stages.

施用氮肥的效果在植物生长后期才明显的表现出来，施氮样地地上生物量明显提高；增温和施氮作用使地下生物量发生了一定变化，但无显著差异；通过多元逐步回归发现，影响植物群落地上生物量和地下生物量最显著的因子是10-20cm土层的土壤湿度。

The relationship between biomass and succession gradient also showed unimodel pattern: y=-8.7647χ^2+86.696χ+67.14 (R^2=0.6164). As for functional groups of life form, annual plants showed decreasing trend in the community, perennial grass showed increasing tendency, while sedges and perennial forbs both showed increasing tendency, in which the increasing extend for sedges slowly and for grasses sharply.

一年生植物在群落中的数量呈下降趋势；禾本科植物在群落中的数量呈上升趋势；莎草类及杂类草植物在群落中的数量均呈增加趋势，但莎草类植物增幅不大，而杂类草植物则急剧增加。

In the grasses bracts are borne in pairs below the spikelets and are called glumes.

在禾本科植物中苞片成对生长在每一个小穗的基部，称为颖片。

The common observation that dogs and cats nibble on grass, presumably when ill, strengthens our belief in the healing power of grasses.

共同的看法，狗和貓輕咬草地，大概患病時，加強了我們的信念，癒合權力草。

Yellowstone is well known for its wildlife, and the geysers are critical for grass-fed bison to survive the long, brutal winters of Yellowstone ? when snow deeply buries the grasses.

黄石公园以其野生动物闻名，而喷泉对那些在要在黄石公园中度过漫长而又严酷的冬季的食草的美洲野牛来说可谓至关重要。

Large rhizomatous perennial grasses found by riversides and in ditches having jointed stems and large gray-white feathery panicles.

多年生有根茎的高大的草本植物，见于河边、水沟，茎有接头，有巨大的灰白色羽状圆锥花序。

The aboveground biomass and absolute growth rate of aboveground biomass of shrub, half-shrub are higher than herbal grasses.

灌木、半灌木的地上生物量以及地上绝对生长率均高于禾本科杂草。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。