Variation of important value of dominant weed is that in spring and fall the dominant weed is Viola prionantha while in summer it is Digitaria ischaemum. In general management lawn community it is Leymus secalinus that is the dominant weed in spring and fall and Digitaria ischaemum in summer.

管理水平較差的草坪群落中日韩精品更新影院在线播放视频，春季和秋季是早開堇菜占優(yōu)勢成年人黄色网站视频，夏季是止血馬唐占優(yōu)勢anjiuse在线观看；管理水平一般的草坪群落中春农村老熟女乱子视频、秋季節(jié)是賴草占優(yōu)勢亚洲一区二区黄色视频，夏季也是止血馬唐占優(yōu)勢欧美性爱有码；管理水平較好的草坪群落中整個(gè)生長季是鼠掌老鸛草、鵝絨委陵菜污黄色网站在线观看、賴草占優(yōu)勢激情亚洲国产另类图片在线观看网站，且以鼠掌老鸛草的優(yōu)勢度最大国外真实呦女酱网址。

With statistical method,the high temperature in all area of Shandong province is analyzed.The results indicate that there is apparent interdecadal variation for the estival hot days and the extreme high te...

利用統(tǒng)計(jì)方法分析山東省各地高溫多年變化特征，發(fā)現(xiàn)夏季高溫日數(shù)和極端最高氣溫均存在明顯的年代際變化欧美性爱福利，且東西部變化不盡相同人人操人人人；在60年代末70年代初全省夏季極端最高氣溫發(fā)生了一次轉(zhuǎn)折性變化。

Compared the spacial features for the estival extreme high temperature and the hot days in Shandong Province from 1961 to 1990 with that from 1971 to 2000,it indicates that there is evident regional difference for the Climatic change of it,the hot days in the eastern increased but decreased in the western.

對比分析山東省夏季1961～1990年和1971～2000年前后30年極端最高氣溫和高溫日數(shù)的分布和變化欧美性黄视频，得知山東省夏季高溫的氣候變化存在明顯的地域性差異一级a在线，東部地區(qū)高溫有所增多，西部地區(qū)明顯減少www·com啪啪啪。

By simulating river plume evolution under the combined action of tide and estival wind field averaged over many years, it is found that the modeled salinity distribution is consistent with observed rather well, which means river plume development plays an important role in adjusting the salinity distribution in surface layer of Bohai Sea.

通過檢驗(yàn)河流羽流在潮汐和渤海夏季多年平均風(fēng)場共同作用下的發(fā)展特征在线视频久，發(fā)現(xiàn)計(jì)算得到的表層海水鹽度分布與實(shí)測值相當(dāng)吻合，因此可以認(rèn)為河流羽流發(fā)展對于渤海夏季鹽度分布起著重要作用图片专区亚洲欧美另类。

By simulating river plume evolution under the combined action of tide and estival wind field averaged over many years, we have found that the modeled salinity distribution is consistent with the observed one rather well, which means the river plume develo

通過檢驗(yàn)河流羽流在潮汐和渤海夏季多年平均風(fēng)場共同作用下的發(fā)展特征先锋自拍日韩视频，發(fā)現(xiàn)計(jì)算得到的表層海水鹽度分布與實(shí)測值相當(dāng)吻合，因此可以認(rèn)為河流羽流發(fā)展對于渤海夏季鹽度分布起著重要作用超碰黄色网站99。

Bieti lost its habitat continuously in recently decades associated with the extension of rangelands and farmlands, as well as firewood collection etc. The monkey live mainly in primary fir forest and the mixed conifer forest, to evaluate the status of the monkeys' habitat, we employed GIS and RS software to identify the habitat types with five Landsat TM/ETM+ satellite imagery in winter of 1986, 1992, 1997, 2001 and 2006 years respectively. The work resulted in: 1 the size of summer grazing lands, farmlands, and fir forest was 13 100 hm2, 6 400 hm2, and 30 500 hm2 in 2006 respectively; 2 during the past 20 years (1986-2006), the size of fir forest (including primary fir forest and the mixed conifer forest) decreased by 14.6%(5 200 hm2), summer grazing lands and farmlands increased by 47.2%(4 200 hm2) and 14.3％(800 hm2) respectively; and 3, during the past 20 years, the number of firry forest patches increased by 68.4%, the mean size of firry forest patches decreased by 49.3%(from 15.1 to7.6 hm2), the largest patch index of firry forest decreased 54.9%; the patch richness had no change, but the Shannon's diversity index and the Shannon's evenness index increased by 2.7% respectively.

為了評估該物種的棲息地現(xiàn)狀和變化情況50岁国产肥女人精品区，我們通過野外調(diào)查工作，應(yīng)用GIS和RS技術(shù)在线观看国产精品第一区二区免费，分別解譯了1986年影音先锋黄色9001、1992年、1997年免费在线国产小电影一区、2001年和2006年的Landsat TM/ETM+冬季衛(wèi)星影像xxxxxcom，并對解譯結(jié)果進(jìn)行了計(jì)算和分析，得到了以下西藏種群棲息地的主要結(jié)果：1）現(xiàn)有暗針葉林（包括原始針葉林和針闊混交林）面積是30 500 hm2在线一级不卡a毛片，夏季牧場面積是13 100 hm2欧美性爱交视频，農(nóng)田面積是6 400 hm2；2）在過去20年間（1986-2006年）jinv在线观看精品，暗針葉林面積減少了14.6％（5 200 hm2）美女露出奶头无遮挡免费视频，夏季牧場面積增加了47.2％（4 200 hm2），農(nóng)田面積增加了14.3％（800 hm2）国产二级黄片视频；3）在過去20年間被操出白浆视频，暗針葉林的斑塊數(shù)量增加了68.4％，平均斑塊面積下降了49.3％（從1986年的15.1 hm2下降到2006年的7.6 hm2）www.jcwmining.com，最大的斑塊指數(shù)下降了54.9％草久免费；景觀豐富度并沒有變化，但Shannon多樣性指數(shù)和Shannon均勻度指數(shù)分別增加了2.7％无码无毒小视频在线播放。

Year hindcast experiments (1983-2002) and 5-year forecasts of summer average temperature and rainfall over China are presented by using regional climate model that is a nested global atmosphere ocean coupled model.

使用國家氣候中心全球海氣耦合模式嵌套區(qū)域氣候模式對1983-2002年中國夏季平均氣溫和降水進(jìn)行了數(shù)值回報(bào)試驗(yàn)，并對2003-2007年夏季進(jìn)行實(shí)時(shí)預(yù)報(bào)精品视频在线观看日韩AV。

The caloric values and ash contents of some mangrove woods in Dongzhai Harbor Mangrove Forest Reserve of Hainan Province were determined in Summer,and the changes of the caloric value of Kandelia candel woods at different latitudes were studied.

在夏季對海南東寨港紅樹林自然保護(hù)區(qū)一些紅樹植物木材的灰分含量和熱值進(jìn)行了測定亚洲哟哟在线网站在线观看，并研究了夏季不同緯度的秋茄木材熱值的變化国产福利导航视频。

Based on the 1950-1998 SST and NCEP/NCAR reanalysis data, the temporal/spatial variations of SSTA in the Western Pacific Warm Pool region have been analyzed in this paper by means of the methods of EOF and composite analysis. Results show that there are two main spatial patterns of the WP SSTA: one is uniform in the whole region, the other is meridionally anti-symmetric.

采用海溫資料和NCEP/NCAR 49a再分析的高度場、風(fēng)場資料禁止18岁以下观看的网站，利用EOF亚洲各国三级片网站、合成分析方法，研究了夏季暖池SSTA的時(shí)空演變91青春娱乐国产盛宴精品，結(jié)果顯示：夏季暖池SSTA具有整體一致性分布和南北區(qū)域的反對稱分布兩種空間分布型欧美性aa。

By comparing different processes in the same period, following operting modeof interactive reactor was recommend: enhanced A~2/O process fits on spring period,pre-anoxic inverted A~2/O process was recommend in dry/mizzle weather in summerperiod, step aeration process was adopted in rainy weather in summer period,alternating oxygen concentration inverted A~2/O process was appropriate in autumnperiod, and normal inverted A~2/O process was better in winter period.

通過不同季節(jié)多種工藝的比較，確定了高效生物反應(yīng)器運(yùn)行模式：春季時(shí)段采用改良型A~2／O工藝亚洲人成中文无码毛片茄子，夏季晴天／小雨時(shí)段采用預(yù)缺氧+倒置A~2／O工藝91精品国产9色，夏季連續(xù)暴雨時(shí)段采用多點(diǎn)進(jìn)水工藝，秋季時(shí)段采用低氧／常氧交替運(yùn)行的倒置A~2／O工藝国产三级精品，冬季時(shí)段采用常規(guī)倒置A~2／O工藝三级美女黄贴。