生物量

From this we can see that stover is increasing with more chemical fertilizer.

随着化肥用量的增加，土壤盐分含量越高，对油菜生物量影响越严重，适宜的秸秆用量也随之增大。

Corn stalk ; stubble remained in field ; application of fertilizer ; soil fertility ; soil microbial biomass carbon

玉米秸秆；根茬；施肥；土壤肥力；土壤微生物量碳

Cyanobacteria dominated in subaerial and soil inhabitats in terms of number of species or in biomass, while diatoms and green algae have advantages in oligotrophic and mesotrophic aquatic environments respectively.

亚气及陆地生境中蓝藻在种类数、生物量方面占主导地位；贫瘠水体生境中硅藻占主要地位，营养较丰富水体中绿藻处于优势地位。

The experiment comprised of twelve non-pressure subirrigation treatments and one furrow irrigation as the control.

为了制定合理的番茄无压地下灌溉制度，指导大田生产实践，利用2 a温室大棚无压地下灌溉技术的番茄种植试验，研究了番茄根系分布特性和地上部分生物量的调控效应。

Proportion of trunk increased, and biomass of root was more than branch in the species of the subtree layer.

亚乔木层种类生物量中干的比重增加，反映了其高生长的特性；而根的比例比枝大。

Early successional stages are characterized by pioneer species, low biomass and often

早期的演替阶段，具有先锋物种、低生物量和低营养水平的特征。

The results showed that the concentration of Eu(superscript 3+) had different effects on biomass accumulation of roots.

结果表明：Eu(上标 3+)浓度对不同类型大黄根的生物量积累作用效果不同。

Phosphorus was not a limiting nutritional factor of Formosan sweet gum, biomass, leaf △ ratio anti P efficiency could be used as the indicators of P stress-tolerance of Formosan sweet gum provenances.

南昌种源是优良的耐磷胁迫种源，南丹种源次之；磷不是枫香的限制性养分因子：叶片△、磷效率和生物量可作为确定枫香耐磷胁迫的指标。

The contents of crude protein and 18 kinds of amino acids in the powder of tetraploidy black locust for fodder leaves at four stages,from which Langfang,Hebei Province,were determined.Their value for feeding were evaluated by means of amino acid scores and essential amino acid index.

测定了廊坊地区饲料型四倍体刺槐叶粉4个不同时期的粗蛋白质含量及18种氨基酸组分，用氨基酸分和必需氨基酸指数对其氨基酸营养进行评价，并结合其生物量对最佳刈割时期进行了分析。

The results showed that the crude protein content,the eighteen essential amino acids and the twelve essential amino acids in the powder of tetraploidy black locust for fodder leaves were highly at the four stages,and along with the time process,they were all descending gradually.Moreover,their essential amino acid score were also highly and their amino acid were balanceable.And their essential amino acid index of cattle,pig,chicken,duck,goose,fish,prawn and sheep were higher than 0.86,therefore they can be the excellent fodder of these animals.

结果表明，饲料型四倍体刺槐叶粉4个时期的粗蛋白1、8种氨基酸总量和12种必需氨基酸含量均较高，且呈现随时间的推移而逐渐下降的趋势；其必需氨基酸分均较高，氨基酸组成较平衡；对牛、猪、鸡、鸭、鹅、草鱼、对虾和羊8种动物的必需氨基酸指数4个时期之间无差异，均大于0.86，可作为这些动物的优良植物饲料蛋白源；在7月中下旬其生物量和营养达到了最佳结合点，适宜采摘或刈割。

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。