查询词典 fertility

The results indicated that there existed significant variation for the soil fertility of Liuyang tobacco-growing areas.

利用模糊数学原理和多元统计分析方法，对浏阳植烟土壤肥力状况进行了综合评价。

The results comprehensive evaluation indicated that there existed significant variation for the soil fertility of Sanmenxia tobacco-growing area.

对河南省三门峡烟区的238个土壤样品的养分指标进行测定，确定了各指标所属的隶属函数类型及其阈值，并且利用模糊数学原理和多元统计分析方法，对土壤的肥力状况进行了综合评价。

The results of comprehensive evaluation indicated that there existed significant variation for the soil fertility of Guiyang tobacco-growing area.

对湖南省桂阳县烟区的345个土壤样品、9项土壤养分指标进行了测定，确定了各指标所属的隶属函数类型及其阈值，采用偏相关分析法求得各指标的权重，运用加乘法算出各土样的土壤肥力综合指标值，进而对桂阳县植烟土壤适宜性进行了综合评价。

Results showed that flue-cured tobacco took up more N from soil than from N fertilizer, and 18.67%-29.32% of N absorbed by flue-cured tobacco was derived from N fertilizer, 70.68%-81.33% from soil under two level fertility fields.

结果表明，在高低土壤肥力条件下，烤烟吸收的土壤氮量多于吸收的肥料氮量，烤烟吸收的氮素18.67%~29.32%来自于肥料，70.68%~81.33%来自于土壤。

Through development of multiple cropping to exploit the sunlight resources, thermal resources, water resources and soil resources of farmland in summer fallow period is very helpful for improvement of soil fertility and to prevent fie...

发展多熟种植，开发利用夏闲期农田光热水土资源，有助于改善农田土壤肥力、缓解农田生态系统退化、增加农区畜牧业饲料来源，实现农牧结合，增加农牧民经济收入。

It is advanced farming technology which through the implementation of reduced tillage, no-tillage technology, using crop stalks stubble ground cover to reduce soil water erosion, wind erosion, so as to enhance the capacity of soil fertility and drought-resistance .Function and role of conservation tillage technology have been proved by practice.

保护性耕作技术是相对于传统耕作的一种新型耕作技术，起源于19世纪末的美国，通过对农田实行少耕、免耕技术，尽可能用农作物秸秆、残茬覆盖地表，以减少土壤水蚀、风蚀，从而提高土壤肥力和抗旱能力的先进耕作技术。

Or they could be donated to science either for stem cell research or for work on treating in fertility .

一种观点是解冻胚胎，任其死亡，把它们捐赠给科学事业用来做干细胞研究或者用来治疗不育症。

The increments of organic matter, total nitrogen and total phosphorus in soil were 3.05~3.06g/kg, 0.06~0.07g/kg and 0.01~0.26g/kg, respectively. Spring wheat-spring highland barley or spring highland barley-winter wheat rotation also was benefited to raise soil fertility.

轮作周期内春稞→春油菜、春小麦→春油菜轮作对以细菌为主导的土壤微生物的生长与繁殖具有显著的促进作用，耕层土壤有机质、全氮、全磷的绝对增长量分别达3.05~3.06g/kg，0.06~0.07g/kg，0.01~0.26g/kg。

This assumption is based on field observations, soil fertility survey information, and reports by provincial scientists.

该假定基于田间观察，土壤肥力普查资料和各省科学家的报导。

However, crossing fertility between them was lower than that of mating in and in, and fertilized egg of reciprocal crossing can be incubated and produced F〓 without prezygotic isolation. Among all combinations of reciprocal crossing, crossing of wild male quail×female small-type domestic quail are proved to produce the best effect.

野生日本鸣鹑与家鹑群体之间的杂交能育性低于同种群交配水平，但可以实现正、反交，产生受精卵、孵化出杂种一代，不存在合子前生殖隔离；在所有正、反交组合中，以野雄鹑×小型雌家鹑的效果最好。

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。