生物量

The effects of fire on ecosystems are complex, ranging from the reduction or elimination of aboveground biomass t...

火对生态系统的影响是复杂的，范围也很广，从减少地上部分生物量到对地下部分物理性质、化学性质、微生物降解过程和细根系的生长。

An optical model used for grassland assessment is established based on the relationship between vegetation index and aboveground biomass.

通过地上生物量和植被指数间的对应关系，建立草原生产力估产模型。

Species richness was positively correlated with aboveground biomass.

物种丰富度与地上生物量呈显著正相关。

Regardless of the kind of competition, lotus leaf fern Adiantum in 5400 lux light intensity, 60 percent of soil moisture conditions, the total biomass of the largest, which also shows a lotus leaf fern Adiantum more to live in this habitat, but In such a habitat, the species of lotus leaf fern Adiantum competition among the lowest relative intensity, but these habitats and less dispersed.

无论有无种内竞争，荷叶铁线蕨在5400lux光照强度，60%土壤含水量的环境条件下，总生物量最大，这也说明了荷叶铁线蕨更适应生活在这个生境中，但是在这种生境，荷叶铁线蕨的种间竞争相对作用强度最低，而且这些生境少并分散。

During the process of long-time adaptive evolution, wetland plants adopted a series of special strategies to acclimate to salt stress. The main strategies are: 1 life history adjustment, e. g., to adjust seed germination time, implement seed dormancy and viviparity, and change reproductive manner to escape from direct salt stress, 2 morphological adjustment, e. g., to adjust biomass allocation pattern, age stem, defoliate, and carnify vegetative organs to isolate the redundant Na(superscript +) to the inactive-metabolism shoots or exclude the Na(superscript +)from tissues; 3 anatomic adjustment, e. g., to sink stoma, develop aerenchyma, and thicken cuticle and phellogen to maintain normal photosynthesis and respiration; 4 physiological and biochemical adjustment, e. g., to exclude and excrete salt, compartmentalize ions, adjust osmosis, do selective absorption, regulate hormones, and induce antioxidative enzymes to maintain the osmotic equilibrium and eliminate the active oxygen in cell; and 5 molecular level adjustment, e. g., to start up many salt-induced genes to regulate the metabolic responses to salt stress.

在长期的适应进化过程中，湿地植物形成了多种适应盐胁迫的策略，主要有：1生活史方面，植物可通过种子萌发时间的调整、种子体眠、胎生、繁殖方式的改变等逃避盐度的直接伤害；2形态学方面，植物可通过生物量分配模式的调整、茎的老化、落叶及营养器官的肉质化等将多余的Na隔离到代谢不活跃的茎中或将其排出体外；3解剖学方面，植物可通过气孔下陷、发达的通气组织、增加细胞木栓层、角质层及栅栏组织的厚度等以维持植物正常的光合作用和呼吸作用；4生理生化方面，植物可通过离子区隔化、拒盐、泌盐、选择性吸收、渗透调节、激素调节及抗氧化物酶的诱导等来维持细胞内正常的渗透压，清除胞内活性氧分子；5分子水平方面，植物可通过多种与盐胁迫相关的基因来调控细胞内的多种代谢反应。

In ttmtreatments of coring aerification, vertical mowing and raking, respectively, compared with the control treatment.

施肥与打孔、切根和梳草处理之间在草坪密度和地上生物量上存在显著的互作效应（P〈0.05）。

In this paper, the biomasses of 4 types of shrublands,such as Myrsine africana,Loropetalum chinense,Vitex negundo and Cotinus coggygria,and their responses to cutting were investigated with harvest method and cutting experiment.

本文采用收获法和模拟砍伐实验研究了三峡地区铁仔灌丛、木灌丛、荆条灌丛和黄栌灌丛的生物量及黄栌灌丛、木灌丛地上部分砍伐后的再生能力。

The new planting techniques promoted root growth, vegetation cover, and biomass and seed production compared with the conventional planting technique. This suggests that the air brick technique is more suitable for the study area, where the natural soils are thin, and may prove suitable for similar areas elsewhere in the world.

研究结果显示，与传统的栽培技术相比，该技术有效促进了植物根系的生长发育、改善了边坡植被覆盖度、增加了坡面植物生物量和种子产量，非常适宜土壤瘠薄的湿润山区公路两侧陡壁绿化和植物重建，同样也适宜世界上类似地区公路两侧绿化和植物重建。

Current research survey on ALB,their ecological role and biomass detection methods were emphatically summarized.

介绍了溶藻细菌的研究概况，重点对溶藻细菌的生态学作用及其生物量的检测方法进行了综述。

The composition and biomass of them were studied,and the ecological distribution sections of every alga were summarized.

分析了各地区春季不同月份藻类的种群结构和平均生物量变化，总结了各藻的生态分布区域。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。