So. we conducted this study on seedling recruitment process and growth performance of some familiar forbs component species under different microsites (light and nutrient availability), which were made by a simulative artificially method, in alpine meadow communities of the eastern Qinghai-Tibetan Plateau.

因此欧美一级免费看黄片视频，我們利用人工模擬的方法欧美性爱23TB，研究了青藏高原東部高寒草甸群落中常見的雜類草組分種在不同微生境下的幼苗更新(從種子萌發(fā)到幼苗出土、存活至越冬)過程和生長(生長率黄色视频看片、生物量積累和分配)特征色哟哟AV在线播放。

The ecologicalcharacteristics of community structure, species diversity, its ecological effects on soil health,and eco-system functions of soil water holding capacities, water and soil conservation effectswere studied symmatically in Nverzhai watershed , which was the key experiment anddemonstration spot of the Yangtze River Proctction Fores.

針對長江中下游低山丘陵區(qū)土地退化現(xiàn)狀和我國現(xiàn)階段生態(tài)工程建設需求，以湘西北武陵山區(qū)女兒寨小流域為研究對象www.czzssj.com，研究了7種典型植被恢復模式的群落結構国产精品无码AV片、生物量分配格局、物種多樣性一级品精品三级片视频、土壤健康效應等生態(tài)學特征及水土保持亚洲国产女人AAA毛片在线、水源涵養(yǎng)等生態(tài)系統(tǒng)服務功能羞羞漫画在线观看巨黄，具有重要的理論意義和應用價值。

Compared at national average level, the mean biomass of almost all kinds of communities in Jiuzhaigou Valley is higher except that of oak forest.

與全國平均水平相比女18毛片亚洲一级毛片，九寨溝幾乎所有類型的群落的平均生物量都要高于全國同類群落的平均水平91av在线观看91。

However, effects could be observed in the interactions between N and forest type, and the interactions between N and sampling date.

然而通過氮處理與取樣期和林分的交互作用，土壤動物類群生物量對氮沉降有一定的響應趨勢玖玖国产精品视频。

There were a great deal of kinds of the grass with high quality and quantity fed to fish To determine the best symbiosis ecosystem of fish and grass on a closed system circulated yearly, several cold and warm grass was selected to analyse the adaptability and nutrition absorbed. It indicted that Lolium multiform Lam. and lemarthria compressa were the best option due to high adaptability of wetness, high coarse protein, fat and fibre and so on in the leaf, high biomass, high bio-filtration effect of N and P, adaption to the low or high temperature, resist to the plant diseases and insect pests, and the food of fish whose forage was grass.

魚用優(yōu)質(zhì)高產(chǎn)牧草的種類繁多最新无码专区视频在线，為確定最佳的魚草共生周年循環(huán)系統(tǒng)，本文選擇幾種冷季牧草和暖季牧草進行生長適應性與營養(yǎng)吸收研究黄页在线免费观看色秀，分析表明欧美在线视频首页，多花黑麥草和扁穗牛鞭草是最佳的冷季牧草和暖季牧草，它們耐水性強永久在线精品免费播放，葉片中所含的粗蛋白一级a作爱在线视频观看、粗脂肪、粗纖維等化學成分高欧美女肏屄，植株的生物量也高日韩一级A片在线高清视频，生物過濾養(yǎng)殖廢水中的氮和磷效果好，而且可以適應外界環(huán)境的低溫或高溫又爽又刺激的视频网站，抵抗病蟲侵害美女任人插黄色视频，同時為草食性魚類喜歡食用。

The aboveground biomass and absolute growth rate of aboveground biomass of shrub, half-shrub are higher than herbal grasses.

灌木免费的看黄网站、半灌木的地上生物量以及地上絕對生長率均高于禾本科雜草午夜视频你懂的。

In the 37 herbaceous species identified, only 18, 25, 20, 25 and l7species were present in the PS, PA, PD, HR and CK forests, respectively. For herbages, Stipa bungeana, Arthraxon hispidus, Potentilla multifida and Thymus mongolicus were common in the five plantations. The average coverage, height and biomass of herbages in five artificial forests were different obviously, but community biodiversity was similar.

結果表明：5種人工喬灌林下共有37種草本植物，各人工林林下物種組成數(shù)量在17~25之間變化亚州黄色专区毛毛片，其中以杏樹林最多永久免费视频在线观看色黄；5種人工林下草本層平均蓋度、平均高度国产在线观看www、平均生物量存在較大差異99精品综合加勒比在线观，但多樣性指數(shù)相差不顯著。

Different herbicides showed different degree of influence on soil microbial biomass C.

相同除草劑在不同土壤中對土壤微生物生物量氮的影響程度是不同的亚洲91在线综合。

It focuses on the methods with which the grazing pressure of microzooplankton on phytoplankton and primary production, the top-down and down-top effect caused by the herbivory of microzooplankton, and the main factors that influenced its herbivory.

文章總結了近年來關于微型浮游動物豐度和生物量及攝食生態(tài)學方面的研究進展欧洲免费AV在线网站观看，主要包括微型浮游動物攝食的研究方法、上下行效應一级毛片在我的世界免费网站视频、影響其攝食的主要因子国内妇人成熟A片免费看。

In the community of pack ice with high biomass, the grazing rates of micro-fauna to algae ranged from 0.09 to 0.21 day-1, which corresponded to remove 8 to 23% of algal preliminary biomass or 58 to 123% of primary production, suggesting that the herbivory was one of the most important passways of carbon flow within the micro-community.

浮冰生物群落中，小型動物區(qū)系對藻類的攝食速率為0.09 和0.21 day-1之間黄色色色费一八，相當于每天攝食8-23 %的藻類初始生物量和58-123 %的產(chǎn)量亚洲无码2019。