施影响

The hypogeal insect pests of eucalyptus are a group of special insect pests, having made serious damages to the young plantation. To solve the problem, it is necessary to use chemicals to control the population of those insect pests. The selection of chemicals and the methods of chemical application must be appropriate so as to lighten and minimize the negative impacts of chemicals on the ecological environment.

桉树地下害虫是一类特殊的害虫群体，在造林初期的危害比较严重，此时应针对不同的害虫选用不同的化学药剂来控制其种群密度，施药时要考虑减轻化学药剂对生态环境的不利影响，应采用毒饵诱杀、根部施药等方式。

Objective: To study the effects of S-3307 spraying time and density on photosynthetic characteristic of Ligusticum chuanxiong.

中文摘要：目的：研究烯效唑喷施浓度和喷施时期对川芎光合特性的影响。

The resuits showed that there was significant difference of SPAD among different leaves under same nitrogen level.

结果表明，在同一施氮水平下，小麦植株不同叶片SPAD值及光舍速率均为：旗叶〉倒二叶〉倒三叶〉倒四叶，说明小麦叶片叶绿素含量及光舍速率在植株上的分布特征相对固定，受施氮水平的影响较小。

After spraying the fermentation supernatant of endophytic actinomycetes GKSHJA and PR1-8, the impact of the endophytic actinomycetes against Sphaerotheca fuliginea histomorphology were tested by the differential interference, and the enzyme activity of POD, SOD, PAL on cucumber leaf treated by spraying endophytic actinomycetes were tested by the spectrophotometer.

对喷施内生放线菌GKSHJA及PR1-8发酵上清液处理后采用微分干涉的方法观测生防菌对白粉菌的组织形态学影响，利用分光光度计测定喷施发酵液后黄瓜叶片内POD、SOD、PAL酶活变化。

Ni content in pakchois was negatively related to the biomass of the plant. Ni application affected the plant adsorption and accumulation of other mineral nutrients, which showed certain synergia or antagonism.

褐土施Ni影响矿质营养元素的吸收和积累，且随施Ni量的增加表现出一定的协同和拮抗作用。

With increasing nitrogen application rate, the amount of microbes in wheat rhizosphere increased first and decreased then, with the peak appeared at 180 kg N x hm(-2), and the effect was more obvious on monocropped wheat than on intercropped one.

小麦根际的微生物数量随施氮量的增加先增加后降低，以常规施氮处理(N180)的微生物数量最多，氮肥用量对单作小麦的影响大于间作小麦。

Of the nitrogen supplied as inorganic fertilizer is lost under two treatments, and 30% under FAR and 26% under RAR of which leaches to depths over 40 cm of soil profile. It is therefore necessary to understand whether leached nitrogen is utilizable by deep-rooted crops.

两种施肥处理均导致65%左右的氮素损失，其中习惯施氮和推荐施氮分别导致30%和26%的氮素淋洗到40 cm以下土层，为此有必要种植蔬菜后利用深根系粮食作物吸收土壤下层氮素来降低蔬菜生产对环境的影响。

There was no significant effect on soil EC by applying the different manures together with low dose of nitrogen fertilizer.

三种不同C／N的有机肥在低量氮肥时对土壤EC的影响不显著，在高氮量时，增施M1能够增加土壤EC，增施M2、M3能够降低土壤EC。

Results show that application of the two manures increased biomass of the shoots of amaranth, but decreased its As, Cu and Zn content.

在水稻土和赤红壤中分别以2%和4%比例施入含As、Cu和Zn的鸡粪和猪粪，以不施肥为对照进行苋菜盆栽试验，研究施入粪肥对土壤As、Cu和Zn有效性的影响。

Seen from the functional group, perennial grasses and forbs had stable compositions, but compositions and number of shrubs, half shrubs, small half shrubs, annuals and biennials were unsteadiness, where aboveground biomass in warmed plots was much difference with control. Nitrogen addition may enhance aboveground biomass obviously from latter growth stages.

施用氮肥的效果在植物生长后期才明显的表现出来，施氮样地地上生物量明显提高；增温和施氮作用使地下生物量发生了一定变化，但无显著差异；通过多元逐步回归发现，影响植物群落地上生物量和地下生物量最显著的因子是10-20cm土层的土壤湿度。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。