种子的

After preliminary study, it is found that environmental conditions at different levels have different effects on the seeds storage: The storage temperature of Hevea brasiliensis seeds is controlled at 22℃, it has the best effect on extending the seeds longevity, and meet the pratical requirement.

初步研究发现，不同水平的环境因子对种子贮藏的影响作用不同：橡胶树种子的贮藏温度为22℃时，对于减缓种子代谢，延长种子寿命效果最佳。

Result The results indicated that the germination tendencies of small seed was higher, but leaf area and dry matter weight of the big- plump seeds were biggest than other processings.

结果］结果表明，3个处理的发芽势以小粒种子较高；大而饱满种子的叶面积和干物重最大，幼苗初期生长和整齐度都优于大而不饱满的种子和小粒种子。

The suboptimal thermoperiod was 15℃/25℃. 2. The fresh H. ammodendron seeds had highly germination ability, and have no dormant phenomenon; The fruiting wings had significant inhibition the germination of fresh mature seed in autumn, and fruiting wings made H. ammodendron seeds maintain dormancy, but with store time extend, the effect that fruiting wings inhibited seed germination gradually alleviate, fruiting wings didn't inhibition effect of seed germination until the next spring(in 4 month).

2梭梭新采收的去翅种子不存在休眠现象，而具有很高的萌发生活力；果翅对秋天新成熟种子的萌发有显著的抑制作用，使种子处于强迫休眠状态；果翅对种子萌发的抑制作用随着贮藏时间的推移逐渐降低，到翌年春天(4月)果翅解除对种子萌发的抑制作用。

Persicum seeds was 5℃/15℃. The suboptimal thermoperiod was 15℃/25℃. 2. The fresh H. ammodendron seeds had highly germination ability, and have no dormant phenomenon; The fruiting wings had significant inhibition the germination of fresh mature seed in autumn, and fruiting wings made H. ammodendron seeds maintain dormancy, but with store time extend, the effect that fruiting wings inhibited seed germination gradually alleviate, fruiting wings didn't inhibition effect of seed germination until the next spring(in 4 month).

2梭梭新采收的去翅种子不存在休眠现象，而具有很高的萌发生活力；果翅对秋天新成熟种子的萌发有显著的抑制作用，使种子处于强迫休眠状态；果翅对种子萌发的抑制作用随着贮藏时间的推移逐渐降低，到翌年春天(4月)果翅解除对种子萌发的抑制作用。

Cone and seed development was observed from 1993 to 1998 in wind-pollinated Keteleeria davidlana Beissner var. formosana Hayata trees grown at Taipei Botanical Garden. Seed efficiencies per cone (percent filled seed per cone divided by seed potential) were persistently less than 1% during the investigation period.

从1993年至1998年间观察生长在台北植物园的台湾油杉天然受粉毬果与种子的发育，结果发现有效种子率（每毬果内饱满种子数占潜力种子数的百分率），每年均不到l%。

First of all,we tested the germination and water uptake rate of 47 species typical xerophil seeds grow up in north China from 20 families,38 genuses under sufficient water and different Grads water stress by high-molecular-weight polyethylene glycol(PEG6000).The results show that Xerophil seeds from the same habitat exhibited similar patterns in response to water stress.Xerophil seeds from arid community were stronger in germination and imbibition than that from other two communities under serious water stress,whereas Xerophil seeds from humid community were sensitive to any degree of water stress.Namely,the seeds live in arid habitat possessed high germination and quickly water uptake in sufficient water or any degree of water stress,but the others grow up in humid habitat shown significant difference which germination and water uptake well under sufficient water but inhibited even if slight water stress.

首先，我们通过对20个科，38属，47种旱生植物种子在水分充足和不同梯度的干旱处理(聚乙二醇PEG6000)条件下的萌发率及吸水率实验发现，当水分胁迫强烈时，分布于干旱沙漠地区的植物种子其吸水率和萌发率都高于半干旱和湿润地区的植物群落，相反，湿润地区植物种子的吸水率和萌发率对任何的水分胁迫都表现出敏感的响应趋势，也就是说，生境恶劣的植物种子在较强的干旱胁迫下，仍然保持了较高较快的萌发率及吸水率，水分充足与水分缺乏时无显著差异，而生境相对较好的植物种子在水分充足情况下萌发与吸水良好，但在干旱胁迫时则受到明显抑制，水分充足与水分缺乏时差异显著。

And Hedysarum leave and (2) correlation of their responses with seed size.

种子埋得越深，种子的萌发率和出苗率越低，更多的种子受胁迫休眠保存在土壤中作为种子库。

I planted seeds of the Nierembergia variety "Blue Mountain" that is available from Park Seed Co. Seeds of the "White Robe" and "Purple Robe" varieties are available from Stokes Seeds.

我种的种子在Nierembergia品种&蓝山&，也就是可以从公园种子有限公司种子的&白色长袍&和&紫色长袍&品种可从斯托克斯种子。

Put the seeds into wettish sand under temperature of 25,20,15,10,5 ℃,observe the shape changing of embryo and measure its length every other 10 days.

在25，20，15，10，5℃下层积处理明党参种子，每隔10 d观察种子胚的形态变化，并测定种子的胚长和种子霉烂率。

The results indicated that the lignified seed shell had a negative impact on water permeability of seeds,but it was not the main reason for seed dormancy.

结果表明：(1)美国桂花种子木质化种壳对种子的吸水透性有一定的阻碍作用，但不是引起种子休眠的主要原因；(2)美国桂花种子的胚没有休眠，离体胚在光照培养7 d开始萌动；(3)胚乳被严密包裹的机械作用使胚无法获得萌发所必需的水分和氧气，这可能是导致种子休眠的最主要的原因。

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。