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The 9 common used insecticides of cypermethrin 4.5%EC, omethoate 40%EC, chlorpyrifos 40%EC, acetamiprid 3%EC, imidacloprid 10%EC provided excellent control for wheat aphids in fields. The control effects were over 90% at 7 days after spraying. The 9 insecticides had bad effects on aphidius and coccinellidae in three days after spraying and the number of two natural enemies decreased rapidly. But on the 7th day, the number of the two natural enemies increased and there were difference between those treated with imidacloprid, acetamiprid and abamectin and CK. BT had no evident difference compared to the control.

为了明确杀蚜药剂对麦蚜的防治效果、适宜的防治时期、对生态环境安全性和粮食作物食品安全性的影响,对4.5%氯氰菊酯、40%氧化乐果、40%毒死蜱、3%啶虫脒、10%吡虫啉等9种防治麦蚜的药剂进行了筛选,发现各药剂对麦蚜的防效较好,喷药后7d防效均在90%以上。9种农药在喷施后的3d内,对麦蚜的主要天敌蚜茧蜂和瓢虫影响较大,两种天敌数量锐减,但到7d时各处理蚜茧蜂数量均有回升,其中不同剂型的吡虫啉、啶虫脒和鲁植顺克处理的蚜茧蜂数量同对照相差不大。

While aptitudinal extension or internal quantity is so bound up with the essences of bodies that its separability from them involves a metaphysical contradiction, external quantity is, on the other hand, only a natural consequence and effect, which can be so suspended and withheld by the First Cause, that the corporeal substance, retaining its internal quantity, does not extend itself into space.

而智能延期或内部的数量是如此势必与本质的机构,其可分性,由他们涉及到形而上的矛盾,外部数量,但另一方面,只有一个自然的后果和影响,这可以使缓刑,并扣压了由第一个原因,这是有形的物质,仍保留其在国内的数量,并没有扩大自己送入太空。

As a result, the DNA segment of predicted size, about 372 bp, appeared in the two kinds of vibrio, but didn't appear in the others. Therefore, a rapid detection kit for V. alginolyticus was developed successfully. It could provide a quick, exact diagnosis and detection method for the diseases in aquatic animals and human beings, and also for the aquatic food security caused by V.alginolyticus. 3. Furthermore, this detection kit was used to investigate the distribution of V.alginolyticus in seawater of living area, healthy aquicultural seawater ...

此外,我们利用此试剂盒对海南地区的生活区附近海水、水产动物养殖健康区海水和发病区海水进行了溶藻弧菌存在情况的调查,结果显示,生活区附近海水的溶藻弧菌数明显低于水产动物养殖健康区海水和发病区海水,后两者中又以发病区海水的溶藻弧菌数量最多;无论是在水产动物养殖健康区还是在水产动物养殖发病区,养殖场的进水处海水中溶藻弧菌的数量也明显低于养殖池水中的数量

Both of amount of 54 ind/L and 95 ind/L were found from cladocera of 8 species as well as Copepoda of 6 species and their proportion of 28.57% and 21.43% were recorded.

浮游动物28个种属,其中轮虫14个种属,数量137 ind/L,占50%;枝角类8个种属,数量54 ind/L,占28.57%;桡足类6个种属,数量95 ind/L,占21.43%。

Because population of Coccinellidae was small and decreasing in this time, the increasing of coccinellidae was not evident.

由于瓢虫本身数量较少,而且喷药期内麦田瓢虫种群数量呈下降趋势,因此,种群数量回升不明显。

This paper bring out three supply chain contractxontinuous quantity discount contract,buyback contract and incentive or condemnatory contract.

连续折扣点数量折扣契约是在数量折扣的基础上,通过分析单纯的折扣契约是不能完全消除双边际效应,通过分析数量模型能够从供应商和零售商两个角度来激励,达到一种均衡状态,使供应链能达到完美协调。

The quantity and diversity of culturable cellulose-decomposing fungi in these soils are significantly correlated with organic matter, total nitrogen and water content. In addition, the quantity of them are significantly correlated with temperature and altitude. Different plant community and human disturbance have effected on the quantities and diversity of CCDF.

结果发现中低海拔地区土壤CDF数量高于高海拔地区,且数量与样地海拔、土壤含水量、温度、有机质和全氮含量呈显著相关(P.05);CDF在样地内多样性与土壤有机质、全氮、含水量显著相关(P.05);植被类型和人为干扰对CDF的数量和分布都有一定影响。

Species richness and Pielou evenness index were used to measure species diversity. Species richness in polluted area was 32-67, while in control area it was 47-82. Pielou evenness index of tree layer was 0.1161-0.8509, while those of shrub layer and herb layer were 0.1763-0.3249 and 0.0443-0.2601, respectively. The results showed that both species richness and Pielou evenness index were influenced by the point source pollution. Species importance values showed significant differences between polluted area and control area. Dominance of different species had changed, and some species even disappeared under the pressure of pollution, indicating a process of species replacement in plant communities. Such species replacement can provide a scientific basis for species selection for restoration of human-damaged ecosystem. The natural regeneration of Quercus variabilis was insensitive to pollution, while Cupressus funebris was effected seriously.

仅在污染区中出现的物种数量远低于仅在对照区中出现的物种数量;(2)可分出4种基本的群落类型:马尾松林、柏木林、栓皮栎林和马尾松+栓皮栎林,各群落特定层次的物种丰富度指数以及Pielou均匀度指数在污染区与对照区之间存在显著差异;(3)污染胁迫下,物种在群落中的生态优势度发生了变化,反映了群落中不同物种相互替代的过程,这种物种的替代可为今后受损生态系统人为恢复过程中物种的筛选提供一定的理论参考;(4)对群落中王要物种更新的调查发现:栓皮栎林对污染不敏感;柏木林污染区与对照区幼苗数量及分布格局均有明显差异,污染条件下群落未来演替受到严重干扰。

The results showed that :(1) sex ratio of Macaca mulatta population in Neilingding Island was 1∶ 0.98 , in which infancy group was 1∶1.07 , juvenescent group was 1∶0.93 , middle age group was 1∶0.6, middle-old age group was 1∶0.57 , old age group was 1∶1.14 ;(2) age composition pattern of Macaca mulatta population in Neilingdi...

结果表明:( 1 )内伶仃岛猕猴种群雌雄性比为 1∶ 0 。98,各年龄组性比幼年组为 1∶ 1 。0 7,青年组为 1∶ 0 。93,中壮年组为 1∶ 0 。6 ,中老年组为 1∶ 0 。5 7,老年组为 1∶ 1 。1 4 ;( 2 )列出了猕猴种群年龄结构图,确定了年增长率为 6 。9%,种群数量的动态公式是 Nt=2 0 0 e0 。0 69t;( 3)预测了未来 1 0 a的猕猴种群的数量和发展,种群数量从 2 0 0 1年到 2 0 1 0年增长到 1 2 0 0头左右;( 4 )内伶仃岛猕猴种群发展的最适容纳量为 90 0~ 1 1 0 0头(平均 1 0 0 0头)。

In this research, we consider that the predominant bacteria in low temperature wastewater treatment in winter were cold-adapted microorganisms, the number of which increased as the temperature dropped more and more, but rarely high up to the number of mesophilic bacteria in normal temperature due to its low growth rate and the restriction of ecological factors, so that the total number and activity level of microorganism in activated sludge decreased.

随着污水温度的降低,污泥中冷适应微生物的数量逐渐增加,但由于冷适应微生物的生长速率相对较低,且容易受到各种生态因子的抑制作用,其数量无法达到常温下中温微生物的水平,使得污泥中微生物的总体数量和活性降低。

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