查询词典 fertility

The compound of neem oil have obvious effect of anti-fertility, the mechanism of its anti-fertility effect of compound of neem oil could be attributed to the metabolization of oocyte, and the obstruction of metabolization may cause the oocyte denaturalize and necrotize.

印楝油复合物具有明显的抗生育作用，其作用机制一方面可能是通过影响卵泡细胞的代谢过程，导致代谢障碍而致使卵泡细胞发生变性、坏死；另一方面，可能与局部细胞免疫介导有关。

Now, there is a need for Chinese forest to be reformed in fertility and relations of production by the reasons of Chinese forestry current estate, in order to boost Chinese forestry fertility level and contribute to forest double-quick development.

新时期我国林情决定了林业需要从生产力和生产关系两个方面进行变革，从而促进林业生产力发展水平，为林业的跨越式发展做出重要贡献。

The pollen and embryo sac fertility were controlled by two sets of different genes, and both of them made contributions to F〓 spikelet fertility.

花粉育性和胚囊育性分别出不同的遗传基因控制，两者共同决定小穗育性的高低。

The study was to explore the improvement effect to soil fertility of planting green manure on soil fertility in lime soil.

［目的］探讨绿肥对石灰土的增肥效应。

The total nitrogen, hydrolyte N ,available K and soil's OM are principal components in the soil fertility factor analysis. The soil's pH value and the total phosphorus quite are small in the soil fertility contribution.

碱解氮、全氮、速效钾和有机质是土壤肥力因子分析中的主成分，酸碱度和全磷在土壤肥力的贡献中比较小。

The egg fertility is increased greatly to inseminate Cabot's tragopan, and this technology is also used to improve the egg fertility of other endangered pheasants.

黄腹角雉人工授精技术的建立可以大幅提高卵的受精率，这一技术并已被成功地应用于解决其它濒危雉类的授精问题。

The ecological mechanism of fertility transition for a thermo-sensitive genic male sterile line,Qiong-68 ms,was evaluated by means of sowing by stages,investigating leafage and detecting the fertility of pollen.

采用分期播种、叶龄调查以及花粉镜检等方法，对玉米温敏核雄性不育系琼68 ms 育性转换的生态机制进行了研究，发现琼68 ms的育性变化主要受温度影响，日最高温度是其育性转换的主要因素，表现为高温不育，低温可育，育性转换的温度范围为30~33℃，雄穗发育的小穗分化期是对温度敏感的关键时期。

Among the environmental factors,temperature nearly make the same effect toall the tree species of broad leaf korean pine forest.Moisture and fertility of soil aregreatly depend on the soil type.In the broad leaf korean pine forest zone,humus darkbrown soil has the best condition of moisture and fertility,The following are typicaldark brown soil、flood and forest soil;the third is albic brown soil and meadow soil;The worst ones are skeleton brown soil and marshy soil.

在影响树木生长的环境因子中，温度对所有树木的影响几乎相同，土壤的水肥因子是与土壤类型相关性很大的量，不同的土壤类型，水肥条件相差极大，在长白山阔叶红松林带，土壤水肥条件最好的是腐殖质暗棕壤，其次是典型暗棕壤和河滩森林土，土壤水肥条件一般的是草甸土和潜育暗棕壤，水肥条件最差的是粗骨棕壤和沼泽土。

Choose vigorous and fertile strains for out-crossing. Since inbreeding is part of the strategy for setting a new strain and inbreeding often leads to reduced fertility and vigor, the fertility and vigor of the outcross strain is important.

必须选择具有活力及多产能力的鱼种来做异种杂交所需的鱼种，因为自交也是建立创造新品系鱼种的重要改鱼步骤之一，而且自交过程通常会导致鱼只生产能力及活力的降低。

The index drop between 0 and 0.2 occupying the smallest area (73 km2),10.7% of total farmland area. Landscape characteristic has a great influence on soil fertility quality evaluation. Over the past 20 years, the change in soil fertility quality appeared to be upward was in Anthrosols derived from phyllite, granite and red sandstone, with an elevation below 800m.

景观特征对土壤肥力质量的演化有很大影响，20年来土壤肥力质量上升的，主要分布在千枚岩、花岗岩和红砂岩发育的土壤中，土壤类型为潴育型水稻土，海拔在800m以下。

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。