群落

In purplish soil, the number of dominant microbial populations in the rhizosphere was greater than in the other two soils, and the population diversities of bacteria and actinomycetes were even greater and more constant, suggesting that the community structures of microorganisms in neutral purplish soil were more reasonable than in both yellow earth and yellow rendzina, which was probably related to the low incidence of tobacco bacterial wilt in the neutral purplish soil.

烤烟根际微生物的种群多样性及其变化在不同土壤中表现也不一样，相对于黄壤和黄色石灰土，在中性紫色土中，根际微生物的优势种群数目较多，根际细菌和放线菌种群更具多样性，而且较稳定，表明其群落结构更为合理，这可能与中性紫色土上的烟草青枯病发生率较低有一定关系。

Spatial and temporal variations in soil respiration were detected in the area.

土壤呼吸的温度敏感性在各群落之间存在着一定的差异。

The maximum growth rate is 0 22 cm d , and appears in ramification period Its community structure is reasonable rhomboid structure The leaf stem ratio will increase with increasing the height of plant .

出现在分枝期末期；绝对生长速率和相对生长速率在整个生育期内呈单峰曲线，最大值出现在分枝前期；其群落结构为菱形结构，是一个合理的株型结构；叶茎比随离地高度的增加而增加，符合指数增长方程。

Although wolves dig under it, and roe deer and elk are believed to leap it, the herd of these largest of Europe's mammals remains divided, and with it, its gene pool—divided and mortally diminished, some zoologists fear.

尽管狼在地下打洞，人们也认为狍子和麋鹿能够越过这个障碍，但这个欧洲最大的哺乳动物群落还是被人为分隔开来，有些动物学家担心种群的遗传基因会遭到割裂，导致灭绝。

Microphylla plantations are obvious, such effects and the contents of soil organic matter, N, P and K are gradually increased with the growth of C. microphylla plantations. Moreover, the activities of phosphomonoesterase, saccharase, protease, urease, dehydrogenase, polyphenol oxidase and nitrate reductase and the contents of edaphon C, N and P are significantly increased at soil depth of 0~30 cm, especially at soil depth of 0~10 cm.

随着小叶锦鸡儿固沙群落发育时间的增长，其综合防风性能提高，土壤有机质、N，P，K含量和生物活性逐渐得到改善。0~30 cm土层中磷酸单酯酶、蛋白酶、脲酶、蔗糖酶、硝酸还原酶、多酚氧化酶、脱氢酶的活性和土壤微生物生物量C，N和P含量均大幅度提高，其中0~10 cm土层增幅最大。

In the beginning of foundation of S. alterniflora salt marsh, macrobenthos were mainly composed of gastropod.

大型底栖动物群落结构和多样性特征与盐沼的发育过程有密切联系。

In the beginning of foundation of S. alterniflora salt marsh, the abundance and diversity of macrobenthos were at a lower level, especial for the crabs.

互花米草盐沼发育初期，其大型底栖动物群落的物种丰度和多样性较低，特别是活动能力强的蟹类较少。

From analysis it could be seen that intercropping aromatic plants in sand soil in pear orchard had good regulatory effects on the soil microbial quantity, the ratio of the soil fungi, bacteria and actinomyees in soil microbial community and the soil available nutrients, among which, intercropping Ocimum basilicum L on the soil microbial quantity and content of the soil nutrients was better than other treatments.

间作芳香植物对于沙地梨园土壤微生物数量及其群落中真菌、细菌和放线菌的比例与土壤中有效态养分含量具有良好的调节作用，其中柠檬罗勒对提高梨园土壤微生物数量、土壤养分含量的综合效果最佳。

Results show that main microbial populations in the reservoir are saprophytic bacteria,hydrocarbon-oxidizing bacteria and ferment bacter...

结果表明，腐生菌、烃类氧化菌、发酵菌等是油藏中存在的主要微生物群落；注入玉米浆可以有效刺激内源微生物的生长与代谢，产生表面活性剂和生物气，有利于驱油；硝酸铵可以有效抑制硫酸盐还原菌的生长。

Studies on savanna are of great benefit for people to realize its grown characters and conditions, so that we could improve the ability of sustainable use and management.

对Savanna群落的研究有助于了解其植被生长状况与环境，提高可持续利用与管理水平。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。